Venturi style vacuum pump (

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Forum topic by northern9 posted 11-30-2020 01:27 PM 311 views 0 times favorited 3 replies Add to Favorites Watch
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2 posts in 55 days

11-30-2020 01:27 PM

Hello friends,
I was wondering if anyone has built the v4 vacuum pump from

For those who built the Venturi kit, what compressor model / specs are you using with it?

I’m curious to hear from anyone who has built this pump and which compressor worked well (or not so well).

Thanks for any input.

3 replies so far

View Bill_Steele's profile


748 posts in 2701 days

#1 posted 11-30-2020 06:15 PM

I built one. I think it’s a good kit—has everything you need. I chose the “Plus” size. I’m using a Porter Cable Twin stack air compressor—here are the specs:

I think my compressor works fine for this application. I don’t think you need a real powerful compressor or even anything with a large tank. The compressor should run when you first apply vacuum and then again if the vacuum drops due to leakage. My compressor only comes on once or twice in a 4 hour period during a press and runs for just a short period.

I would suggest using a PTFE paste to seal the threads rather than Teflon tape. I used Teflon at first but had more leakage than I wanted so I took it all apart or used the paste and it is very tight now.

View splintergroup's profile


4372 posts in 2192 days

#2 posted 11-30-2020 07:38 PM

I assembled the kit several years ago. My compressor is a large one, but aside from the initial blast of air to draw down the bag, I think most any compressor will suffice. You’ll need some pressure (I run at 120psi) to get the last bit of inches on the vacuum gauge, but I love mine and don’t regret it versus a pump.

View northern9's profile


2 posts in 55 days

#3 posted 12-02-2020 04:07 AM

Thank you both for the detailed responses! This is really helpful.

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