Post
by Brotherton Lad » Sat Sep 04, 2010 10:22 pm
They look like S30s, obviously the second one has a separate pressure release valve, so is probably about 20 years old. Unscrew them, bin the old rubbers, clean the metal with a wire brush and emery cloth or wire wool, and fit new rubbers (Hop and Grape, about 40p each), smear of vaseline. Test by filling the keg with water and squirting gas in from a HB cylinder. Put vaseline on the cap threads too.
I've never seen a gas bulb valve, is that a pin in the centre or a scar on the side?