Check valve for beer engine

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Does anyone know where to get a decent check valve for my beer engine? I'm. Going to be using it with a corny set at low co2 pressure less than 5psi. Thanks

 

[peebee]

Here's what I use:

https://rlbs.ltd.uk/check-valve-high-performance-cask-ale-demand-valve.html

They correctly call them "demand valves" which makes sure they get my vote.

 

[Bigjas]

I have the same one as Peebee, works just great.

 

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Cheers, looks decent that one. Only issue is the £8 shipping they charge!

Will one of these between the corny and the beer engine be OK for it to work correctly?

For those of you with a beer engine setup, how close to a decent cask beer are your beers using a similar setup? Any tips?

 

[peebee]

I often wheel this "treatise" out for these queries: https://drive.google.com/open?id=0BwzEv5tRM-5EQUhZbDNPdmV1bWc Needs a bit of stamina to get through.

Here's some of those demand valves in use:

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(Click the little "up" arrow after "peebee said:" to go to the thread).

And this thread picked up a lot of information (for polypins, and I was fairly active here too so expect some repetition): https://www.thehomebrewforum.co.uk/threads/polypin-casking-priming.78318/​

 

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All. Sorted now. Thanks for the help guys.