The Project: V2™ vacuum press uses your air compressor to generate vacuum for veneering and clamping. This system automatically shuts off air flow to the vacuum generator (called a 'venturi') when the desired vacuum level is reached so your compressor does not run continuously.
No modifications are done to your air compressor. Vacuum is created using the air that comes from your compressor air line. Your compressor will only turn on as pressure is needed to refill its air tank. This 32-piece kit includes the core components of the press including the venturi vacuum generator. Some additional items will need to be purchased at your local hardware store.
In the 18th century, Giovanni Battista Venturi discovered that when compressed air is forced through a restrictive nozzle, its velocity increases and the air is compressed and when it exits the nozzle, it expands and creates vacuum. This amazing concept can be used to generate vacuum efficiently and economically on a vacuum press.
The kit instructions and parts list is not included with the kit itself. You must download the instructions (which includes the parts list) at one of the links below.
Be certain that your air compressor can generate the flow (CFM) required by the version of the V2 system that you wish to order.
@ 80 PSI
@ 90 PSI
|Vac Pro Mini™||.5 CFM||.8 CFM||1.2 CFM||2' x 4'|
|Vac Pro Basic™||
4' x 4'
|Vac Pro Plus™||
4' x 9'
The builder's kit contains all of the parts shown below. Please see the kit instructions for a list of the additional required parts which are available at most hardware stores.
Why is the Project: V2 Kit our top selling vacuum press?
Speed: The Project: V2 system will create vacuum faster than previous versions of our venturi system.
Strength: This system is designed around a very powerful venturi which is capable of creating up to 27.5" of Hg.
Pressure Storage: With an affordable ball valve and integrated barbed fitting, the system can be pre-charged with vacuum pressure to increase the initial pull down speed.
Adjustability: The vacuum controller has an adjustment screw that allows you to dial in your desired level of vacuum. You'll find that 21" of Hg is ideal for most veneering projects.
Air Efficiency: This system requires less than half of the CFM of pressurized air compared to the previous model. This means even smaller compressors can pull down average size vacuum bags. If you are concerned that your air compressor is not strong enough for a V2 system, you may find this link helpful.
Electrical Efficiency: The V2 kit uses only 6.8 watts @120 VAC when the system is recharging vacuum. Keep in mind that the electrical consumption of your air compressor will vary. When the system cycles off, there is no electrical consumption at all!
Quality: The Project: V2 system uses nearly all brass components. No flimsy plastics or cheap stamped metal parts are used.
Non-Proprietary Parts: Most of the parts used on this system can be readily found on the Internet or at your local hardware store.
Durability: The venturi comes with a full lifetime warranty. See the 'More Info' tab above for more information.
Simplicity: The entire system can be built in 2 to 3 hours and the process of building your own vacuum pressing machine is very rewarding.
Weight: The V2 system weighs only 11 lbs and can easily be carried from one location to another.
Noise: The Vac Pro venturi has one other very welcomed improvement... an integrated silencer. We've never offered a better venturi!
For a low voltage version of the system, opt for a 24v DC Mac valve which includes a 24v DC power transformer (for use with standard household current) with a 6' cord and the appropriate Mac valve. The standard voltage option adds a 10' power cord for standard household current. The high voltage option replaces the standard 120v AC Mac valve with a 240v AC unit (no power cord is included). Please note that we do not provide support for the 240v AC version of this kit. You will need to consult an electrician for this type of wiring option.
Add a metal handle with screws for only 3 bucks. You can buy this handle at most hardware stores for the same price or get it here and help support this website.
Gauge Upgrade Option
This upgrade swaps out the standard duty gauge with a stainless steel glycerine-filled gauge. Though this item is not necessary, it is definitely valuable for users who might subject the vacuum press to daily abuse.
V2 Premium Upgrade
Planning a Future Compressor Upgrade? The standard V2 and V2 Plus systems are a great value for users with small to medium sized compressors but if you want the ultimate vacuum press system, the V2 Premium is the way to go. You'll need a larger air compressor to step up to the V2 Premium. From there, you'll only need this 12-piece upgrade kit to get the maximum performance from your V2 system.
Why don't you include the kit instructions with the kit?
It would be too wasteful to print copies of the instructions. Most people have already printed a copy of the instructions before they order... something I highly recommend.
What are the warranty details?
The venturi is warranted to be free of defects in material and workmanship by VeneerSupplies.com for the life of the product. The additional components of this kit are warranted for 90 days. As defined by federal law, this is a limited, non-transferable warranty and is given exclusively to the original purchaser and applies only to Vac Pro™ vacuum generators (venturi) sold at VeneerSupplies.com by JWW Services Inc. for exclusive use in a vacuum press for veneering.
JWW Services Inc. disclaims any warranties, expressed or implied, whether of merchantability of fitness for particular use, except as expressly set forth herein. If at any time during the warranty period a Vac Pro™ venturi is found to have a defect in material or workmanship, JWW Services Inc. will, at our discretion, repair or replace it free of charge. The warranty is void if JWW Services Inc. determines that the venturi has been abused, misused, mishandled or tampered with in anyway whatsoever. Further, product malfunction or deterioration due to normal wear is not covered by this warranty. This warranty shall be declared null and void in the event that the venturi unit is found to be used in any industrial-use application. No implied warranty of this product is extended. Some states do not allow limitations of implied warranty so this limitation may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights, which may vary from state to state. This warranty only applies in the United States. JWW Services Inc. reserves the right to replace any product, which has been discontinued from its product line with a new product of comparable value and function. JWW Services Inc. shall use reasonable efforts to repair or replace any venturi unit covered by this limited warranty. In the event repair or replacement shall require more than thirty days, JWW Services Inc. shall notify the customer accordingly. The sole obligation of JWW Services Inc. under this limited warranty shall be to repair or replace the covered product, in accordance with the terms set forth herein. JWW Services Inc. expressly disclaims any lost sales, profits, general, special, indirect or consequential damages which may result from breach of any warranty, or arising out of the use or inability to use this product. Any warranties which are implied and which cannot be disclaimed shall be limited in duration to a term of 30 days from the date of original retail purchase. Warranty service products should be returned postage pre-paid to JWW Services Inc.
When returning products for warranty service include a note explaining the problem, a copy of the purchase receipt and a return shipping address. Return the unit with a check or money order in the amount of $10.00 to cover handling and return delivery charges. A return authorization number must be obtained from JWW Services Inc. in advance of return. Please call for an RMA number. This number must be displayed on the outside of your shipping container. Should a buyer provide JWW Services Inc. a delivery address that is incorrect, the buyer will be held responsible for the item(s). When sending a product back for warranty service, please be sure to get delivery confirmation or a tracking number, we will not be held responsible if a product is not received.
Review by Sam Makris
If you have a compressor, this is the way to go. It took me a couple of hours to build and the system works flawless. I am very impressed. The instructions were clear and detailed. You will not regret buying from Joe. Packing was awesome. UPS could have pulled a Ace Ventura move and kicked my package all the way to my door without anything getting touched inside.
Review by Benjamin Briggs
Being a DIY'er I ordered separate fittings and valves to make a few changes for my application. I must say that doing business with Joe has been fast and efficient and anyone that is hesitant about any of the products don't be. Order up and have fun.
Review by Bill Graham
Great kit, all the parts you need except for some scrap plywood and a trip to the home center for the PVC pipe and a switch.
Instructions are detailed and complete, easy to follow and get you through the assembly in great shape. The system works great, pulls good vacuum without causing your compressor to run continuously. I have a small compressor and once the vacuum is drawn down the compressor cycles maybe once an hour with a 24x48 bag.
Shipping s quick and the customer service at Veneer Supplies can't be beat!
Review by Luis Olivas
The Project: V2 is absolutely great. It took relatively little time to build and functioned perfectly after being built. I am mainly using this combined with one of the Polyurethane Bags on this site to laminate wood and it is wonderful.
Review by Whit
Well, it looks like another 5-star rating for the V2 project!!
I completed the build a few weeks ago and recently used it for a template routing project. It. Was. Incredible! It was SO much easier than using carpet tape and saved me probably five hours over the course of the project.
I've written a full review on www.lumberjocks.com at http://lumberjocks.com/reviews/3671
Review by David Olig
The system looks wonderful. I was looking forward to using it to stabilize wood turning blanks. Quality was top notch, as are the directions. Only problem was the directions weren't sent with the kit but are very easily extracted from the website. The website is also very well done and am looking forward to using it often.
Note from Joe: I don't include instructions with the kit. They are too expensive to print and some people use the web based instructions instead of the printable PDF file. Also, the instructions get updated fairly often so it makes it hard to have the instructions professionally printed.
Review by Dave Adae
What a great kit. It went together without out any issues. The first panel I pressed was a little worrisome. I was not used to seeing glue press out of the pin holes in the veneer. It cleaned up nicely and the panel looks great.
Review by Morgan Jones
Awesome kit! When I ordered this kit I imagined I would have some problems with the assembly but I thought I could figure it out. It turns out the parts and instructions are absolutely perfect. I had the kit together in about 3 hours. The first time I plugged it in it ran flawlessly. In fact I thought something was wrong because it ran for a short period and stopped. The only thing I had to do was adjust the vacuum switch. Also, I expected it to cycle on and off but it does not leak at all. It pulls the vacuum and never turns back on within the hour clamping time. Very nice.
Review by Ken Bowman
I just completed construction of the V2 kit; very easy to the follow instructions. Pump works great and performs efficiently; finished veneering a music box with ash burl with no issues and the results for excellent. Thank you Joe for a great product.
Review by Leland Liston
I just finished the V2 plus system. It is a fantastic vacuum press. I can't believe how small and light it is and have such a large capacity of applications. I wish I had done this years ago.
Review by Dwayne C
Very easy to follow instructions. Buy the pipe thread tap if you plan to build this. I had trouble finding the tap at my local hardware stores. Pump works great and is very quite. It works so well that I decide to buy the Podz vacuum clamping jig system to use on my Legacy ornamental mill. Joe thank you for a great product. I will tell my woodworking buddies.
Review by Earl Cowles
I purchased and built the Plus version of the V2 Vacuum Press Kit about a year ago. The unit went together quickly and easily. The unit functions flawlessly. It pulls down a vacuum in a 2'x4' bag in just a few seconds.
This veneer press is a great addition to my shop. Prior to owning this I struggled with pressing my veneer with various different methods, cauls, weight, etc. There are no more struggles making my own veneer using this vacuum press system. I highly recommend it!!!
Review by KS
This kit is easily built by anyone with even limited skills. Every stage of the build is thoroughly documented, and once completed the elegant design and use of this vacuum kit becomes readily apparent.
Review by Dan Bentley
Great instructions and easy to assemble. The hardest part about the project was that I chose to make my own threads on the PVC caps. Takes a little time and muscle (just like Joe said) but I saved $9.00.
I am a woodshop teacher and we use this system everyday to make skateboards. It is a great system and well worth the money.
Review by John W.
This is a really good vacuum kit for those that wish for fine quality results on a small scale. The kit was shipped the next day and arrived with no missing parts. I used Joe'e design and it took me about 3 hours to having it up and running. This unit really does not use that much air to build vacuum. I also built his frame press and it works like a charm. I will buy from this site again and must say that it is nice to deal with a pro!
Review by Christian Gamache
I'm more than pleased with the vacuum press I built using Joe's kit and instructions. Today I veneered my first pieces (curved doors) and using advice on veneering given on Joe's web site everything went as predicted. The V2 Plus kit is what I'm using and to my great satisfaction the bag emptied in about 15 seconds and the system didn't re-engage at all for the hour I left the doors in the bag. Pressure went from 17.75 to 17.00. I have the unit hooked to a 30 gallon compressor and the 4 times I filled and depressurized the bag the compressor started once for about 30 seconds.
A home made vacuum press that works fast, silent, efficient, easy to operate and affordable. Bliss....
Thanks Joe for sharing your knowledge!
Review by Andrew B
Like everybody else, two hours later I was in business. My unit cycles on and off a little more frequently than Joe said it would (i.e once every 4 minutes not once every 10 minutes) but I understand that is not a problem. My issue is with a small air compressor that I own, purchased for brad nailing only, maybe .8 CFM at 80 psi. Not enough CFM for the kit that I got (V2 Basic). But just like one of the Q & A's that I read suggested, I just have to "baby" the air compressor until full vacumm is reached (i.e. set it at 125 psi and turn off and on the vacuum kit a couple of times so that the compressor can catch up). Once all the air is out of the bag, both machines (compressor and vacuum press) cycle on and off as advertised.
Now just have to figure out a bent lamination project worthy of such a unit!
Review by Phil Koher
The V2 kit arrived in 2 days and with Joe's instructions it was a piece of cake to assemble in just a couple of hours.
Review by Bill Poplaski
My first thought was I spend all this money and I won't be able to do this. Fear not - you can and I did and it works great. The direction here make impossible to fail. All of my transactions with VeneerSupplies.com have been first class.
Review by Jason Beam
I ordered the V2 kit a while back and had ZERO trouble assembling it. Joe's instructions were more than I needed to get thing together. And once it was together, boy that thing performed so well. My first panel came out perfect thanks to a reliable system that Joe put together for us all :)
Review by David E
I have used this system for about two years with the vacuum press for cabinet door insert panels, bookcase shelves and end panels with perfect results. I have not needed to re-do a single item. Perfectly flat and smooth every time.
Review by Andy Pitts
I bought my "Plus" venturi kit a few years ago. I use an old Craftsman reciprocating compressor that max's out at 100 psi, and I can still pull 25+ inches quickly using a large 4x8 poly bag. The instructions on Joe Woodworker.com are all I needed to make this work great! Why buy an expensive pump when you can quickly make your own from this website?
Review by Joe Bochar
Hands down one of the best investments for my shop. The kit arrived promptly and with my two 24" pvc tubes tapped & cemented I was ready to go. In under 2 hours I had vacuum. Easy to assemble, very clear instructions, and it works!
Now... time to make a vacuum infuser.
Review by John Schumer
I bought the, V2 Auto Cycling Venturi Vacuum Plus Press Kit from Joe last week. It arrived at my door in 3 days, well packed. Everything is top quality!
Took me about 5 hours to assemble mine, with a few trips to the local hardware store for extra brass fittings. I was able to create two 21" vacuum tanks to fit into my Festool Systainer.
Under testing, with my first ever veneer panel in the bag, it created vacuum in 30 seconds, and never cycled back in in 5 hours!
Review by Darien Hobes
Yup. The title says it all. I love this system and I wouldn't trade it for anything (almost). My system took 2 hours to assemble and worked perfectly the first time.
The shipping charge for my order was under $10. You cant beat that. And just like everyone else has said, Joe's level of customer service is super.
Review by Mat Werber
I ordered the Project V2 standard.
The kit was easy and fun to build; I was worried that it would leak because I threaded the PVC chambers by hand (simply drilled a hole and screwed the brass connections in)...but the first time turning it on it worked, and there was zero leakage. I can leave it alone for half an hour or more and the pressure doesn't drop at all.
I ordered it for acoustic guitar construction...specifically, I'll be gluing the braces to the back and sides, and attempting to make a double-top using nomex and paper-thin (1mm) sheets of cedar/spruce.
Review by Aaron Petersen
Like everyone else has said, this is a great kit. I ordered on Tuesday morning, had shipping confirmation with tracking info within 2 hours, and the kit (complete with every part) was on my doorstep Thursday morning.
If you have any interest in veneer this kit is for you. It's so easy anyone can put it together in an hour and start pressing veneer. Plus, dealing with Joe is a pleasure and I can't wait to order from him again.
Review by Chuck Tade
Like many others whose reviews I've read, I've been a hobby woodworker for many years. I happened across this site by accident and was amazed by the quality of content. After surfing here a few times I decided to build the project V2-plus. Due to the accuracy and completeness of Joe's instructions, I found the press very easy to make. It took longer to make the upright style carrier than to assemble the press. I couldn't find 3" PVC where I live (unless I bought a 20 ft piece), so I decided to modify it from two 3" resevoirs to four 2" resevoirs. This means a few more joints and it took a bit more determination with silicone sealing of all fittings, but now it works perfectly. I also bought some vinyl and made my own bag using Joe's plans. Works great, and now I'm gonna make a bigger one. I enthusiastically agree with all the things others have said about how Joe is so easy to deal with (I've never seen such prompt response from an internet seller before), and what good quality products he sells. Don't hesitate to build one of these if you're thinking about it. It's fun. I'm going to do lots of veneering and add vacuum clamping to my system soon.
Review by Mark Beers
I am very new to vacuum pressing and was anxious to find an economical way to get into it. I have been woodworking for years but have not ventured into bow or bent fronted chests, but am ready to go there now. VeneerSupplies.com and JoeWoodworker.com are great resources to guide you through every step to be successful.
I built the V2 Plus kit and am very impressed with the both the quality of the kit and parts and the thoroughness of the instructions. This kit is truly a breeze to assemble. It took me less than 2 hours from receipt and opening the box to having a vacuum press ready to run. I do pride myself on my mechanical skills but did err in my initial assembly. When I e-mailed Joe to explain my symptoms he nailed the issue exactly (I had incorrectly installed the check valve) and he responded in less than 30 minutes at 7:00pm at night. I made the corrections and the system functioned perfectly. This kind of support and response is a model of how internet purchasing and support should be. Great job.
I have since ordered the vacuum clamping add-on for the vacuum press and am absolutely sure that it will be the same high quality as the V2 Plus kit.
I WILL purchase all of my veneering supplies from Joe as I am a firm believer in supporting and dealing with great on-line vendors. You should have every confidence in your dealings here. Good luck.
Review by Jeff d.
I ordered this kit after doing a fair amount of research on the Net. There are a lot of references to this site from all over and I finally came and looked and sent Joe a couple of e-mails that were returned usually that day. After getting the kit, which was shipped and received very quickly, I was able to put it together without any problems due to the great directions. After testing, which went smoothly with no leaks, the controller cycled after about 6-7" of pressure. I e-mailed Joe in the morning to ask if this was OK and got an e-mail back that afternoon saying that it would be allright to use on a panel but that it should not be like that and that he wanted to replace the controller, which he was going to send out the next day. That was on New Years day! I didn't expect a reply to the e-mail untill maybe the following Monday. Instead, that is when I got the new controller.
Everything that is written about the great service, pricing and quality of Joe and this site is right on. My system works great and I will be ordering more in the future. Thanks Joe for giving us "normal" woodworkers a place that wants our business.
Jeff D. Gilbert, Az.
Review by Dave Young
After puting off purchase of a veneer system for years due to high cost I found Joe Woodworker's system and found the web site so well organized, thorough, and simple to follow that I bought the V2 Plus kit. Assembly was straight forward, Joe's answers to questions were same day, and his tips covered every detail. To save space in the shop I wall mounted mine on a hook so it is still portable if needed. I added a 5' compressed air line to the Mac valve to take connect/disconnect force off the Mac valve. This is a well thought out system that's very affordable and works great!
Review by Dan Volman
I ordered this kit last week. It arrived in a few days and following the plans from JWW was straight forward. Probably not even the 3 hr. build time expected, but I wasn't really keeping track. It draws a vacuum in my small bag, 30" sq., more than easily. Now I'm on to building a larger bag to veneer a desk top. This is an excellent product at a very reasonable price. I am also very impressed with the timely way Joe answered my questions about gluing up a DIY vinyl bag. I emailed a question at 10:00 am and an answer was in my mailbox when I had time to check in the evening! This is superb customer service.
Review by Karl Henderson
I purchased V2-plus kit with a 4'X4' poly bag and I have to say the system works great! The kit arrived on Friday. I started construction when I returned home from work and I had the system tested and working before the 10pm news.
The build instructions are very clear and concise.
The best part of this system is that I now have a vacuum press that I can repair, replace, and upgrade.
I highly recommend this kit.
Review by Scott Noakes
I just finished pressing my 1st panel using the V2-Plus, spent less than 2 hours building the pump and had my panel glued up that night. The instruction were easy to follow and made putting it together a snap.
I've made veneer panels before using cauls and clamps, but this was so easy and quick, vacuum is definitely the way to go. I can't say enough about the customer service I received, it was great and shipping was very fast. Looking forward to doing business again.
Review by Leonard Niemi
Just finished my V2 Plus veneer press that my wife bought for me for Christmas. Kit went together very smoothly and I am amazed how VERY quiet the press operates. I though it would be loud with the compressed air but diffently not.
Review by Dan Si
Just wanted to say thanks for the great kit. Me and my 10 year old son put this one together over a few short evenings in the garage. Instructions are great and made it very easy to build. I looked around for the parts you offer in the kit and I don't think it would be feasible to get the parts cheaper than price you have the kit for, plus it was just easier to know I didn't have to go back to the hardware store 10 times because I forget this brass part or that one.
Review by Al Kelm
I just finished assembly of my new V2 press. Having bought your kit I feel like I just saved a thousand dollars for one those "other" vacuum press machines. Your instruction documentation is absolutely wonderful. The shipment's parts list & inventory was 100% accurate. I pressed my first project and the unit worked perfectly. I bought the 2' bag, but I am sure I will be back for more of the larger ones. Thanks.
Review by Larry Fox
Joe - wanted to drop you a line and say thanks for the speedy order and for all the good information available on your site. I put my unit together over the weekend and gave it a test run last night. All I can say is WOW,
very impressive results. After seeing the results I can achieve with the V2-Plus with a 4x6 bag, I am hard pressed to think of a reason why one would shell out a ton of $$ for a pre-built unit. Directions for putting together the V2 Plus kit were complete and 100% accurate and getting the builders kit as opposed to trying to source all the stuff myself was without question the right move. Rarely do I make a purchase where I am 100% satisfied but this is definitely one. I think that adding a vacuum veneering setup to my tool-set will definitely take my workto the next level. I think it is safe to assume I will be placing veneer orders fairly consistently going forward. Well done and thanks again.
Review by Rob Nolan
I never knew it could be so easy to build a vacuum press. I bought the kit for the V2 plus from Joe. Followed his instructions and presto! I had it up in running in no time. No leaks either! Works awesome!
Review by Helmut Furtner
I consider myself very lucky to have stumbled a half a year ago onto your web site. I was skeptic, but needed a vacuum system for my own shop. I worked in a shop before, where the owner got a drop down one sheet sophisticated 5x10 foot System for nearly 10,000 dollars! I ordered your V2 Plus Kit and when we got it altogether (piece of cake) the result was better than the competition. The breather mesh also makes all the difference, a must order! So I use only one sheet of 3/4 plywood with a high gloss Mica as bottom. I polished the Mica with a mold release wax, so no sticking and no residue on the veneer. It works better than perfect. I’m a professional carpenter from Germany and produce custom interiors for mega yachts now here in Fort Lauderdale. The V2 System is so good that it is even for my high end work most perfect. I am very grateful to who ever came up with that gadget.
HF Marine Carpentry
Fort Lauderdale, Florida.
Review by Dave Forbes
Got the V2 kit last week, hooked it up and bagged my first wing over the weekend. My only thought is WHY DIDN'T I DO THIS SOONER! Works better than advertised even with my $89.99 Pep Boys compressor.
Review by Victor Harlow
I'm genuinely impressed. This is an amazing piece of equipment. It took 2 hours to put together. I started after breakfast expecting to finish by mid day but actually, I had the system fully operational well before lunch. The system runs perfectly. This system sure beats the $500 version that [some one else] carries.
Review by Rolf Bergstrom
I received my V2 kit along with a bag, several adhesives (gotta try em all), some supplies and some veneer. Everything arrived quickly and intact. I built the press pretty much exactly to the plans and it went together no problem. Wanted to make sure everything worked before making any mods, though I don't think any are necessary. I'll probably just leave it as is for now. The only thing I might change is the mounting as the unit is very much top heavy. If you lift it by just the handle the manifold assembly will be the fist thing to contact the surface when you set it down, no biggie.
Being in a hurry to try it out I hooked it up to my little PC 6 gal pancake compressor just to check for leaks and such. With a 2 x 4 bag and two 3/4in, 20 x 42 platens inside that little compressor had no trouble pulling the bag down. It took no more than 30 seconds and though the compressor motor kicked on the air pressure never dropped (had it set to 80 psi). If anyone is thinking about this kit but doesn't have a large compressor I think you could easily get by as long as you do flat pieces and keep the dead space in the bag to a minimum. My PC is a newer one that runs 150 psi but it has worked harder filling my truck tires than it did on the vacuum press.
Bottom line: Highly recommended.
Review by Noah Dent
Wow! It only took about 90 minutes to put my system together. I'm completely thrilled with Joe's system and instructions. Great customer support and excellent value. Highly recommended!!!!!!!
Review by Bill Davis
I ordered the V2 Project Builders Kit, a bag, and some other supplies on Nov 14th and the complete order arrived Nov 21st. I was ready, having the reservoir tanks and carrier assembled and ready to add the rest of the parts. I didn't waste any time and had it ready to test within an hour and a half. I plugged it in and, was impressed when the MAC valve clicked as described in the instructions. Added the air connection and it sounded like it was doing its thing but as I waited for the meter to indicate it was working - NOTHING! OK, a few minutes of inspection revealed that Joe had sent me a check valve with the arrow pointing the wrong direction (just kidding). Not wanting to wait for a new one to arrive I just turned it around and the next test resulted in the vacuum climbing at a surprising (to me) rate. I adjusted the vacuum controller and I was in business. THANKS JOE!