Perhaps this is already well known, but this week I was excited to discover that a 1/4" barb mates up perfectly with a standard bicycle pump.
After 5 years of bottling I’ve decided to give kegging a try. Money’s tight so I’ve been scouring Craigslist. I found an ad for pin-lock kegs, clean, pressure tight and $35 a piece. The price didn’t seem that great until I called the guy and found that they came with the disconnects and as much beverage tubing as I needed.
Of the two I picked out, one ended up having a leak around the relief valve. I truly believe the seller didn’t know. Long story short, my garage was quieter than his and I could hear the hiss when I got them home. Soapy water verified it was coming from the relief valve. Before spending $10 and shipping on a new relief valve, I decided to check the O-ring first.
I couldn’t find a square tool the right size to fit the socket in the valve, but managed to jam a large enough flat-head screw driver in there and unscrew it. The O-ring was badly mangled, but I then ran into my next problem. All the kegging and brewing websites sell replacement O-rings for the beer and gas ports and the lid, but nobody sells them for the valve.
Luckily, I found an O-ring at work that fit. I wanted to test it, but haven’t bought a CO2 tank yet. I also do not own an air compressor. I set out with the goal of rigging something to adapt my bicycle pump to the keg disconnects and was ecstatic to find I didn’t need to. It fit perfectly on the 1/4 barbs.
I pumped up to about 40 psi and it’s held for several days. I’m glad I don’t have to buy a new valve, but I am wondering whether Viton is an appropriate material for this application. Does anyone know?