I recently bought a Micromatic G coupler on ebay. I thought I was getting a deal because I got it so cheap and it looked clean. I realized when I got it in, I should've looked at the pictures a little better and maybe I would've realized what I was bidding on. It's an older MM G coupler without a PRV. I know I need 2 PRV's in my system and I'm wondering how to add one at the coupler now. Is there some kind of in-line PRV I can use?
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Coupler without a pressure relief valve?
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Maybe install a T in your gas line and install one of these in it?
Adjustable Pressure Relief Valve | MoreBeer
The relief valve looks like a standard industrial pressure relief valve. You may be able to find it at Grainger or even ebay for less.
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