Graz
Landlord.
Do your KK lids have round or square 'O'-rings? Did you ever find where they were leaking?
Funny you should mention that, the lids are the ones that came with the kegs with round O-rings. I saw these a while back: https://www.balliihoo.co.uk/#ballii...o-valve-pressure-test-point-gauge-p-1516.html
With square washers and wondered if it was worth a try so I've just ordered one.
The plan is to fit the valve to the lid with new inlet and pressure relief rubbers plus a new washer for the valve to lid seal. I'll also to check if the neck of the King Keg has any high spots and sand down accordingly (discussed in another thread on here). I'm then going to pressurise it empty using a bike pump through the schrader valve, my track pump has a gauge so I'll probably take it to the point where the pressure relief opens. After it has settled to a pressure I'll then check for leaks with a spray of diluted washing up liquid (or Starsan), if I don't find any then I'll leave it pressurised and still if it's still holding after a few days. Hopefully that will sort it or it will be hurled in the bin (possibly!).