Beer lines

Description

We are having trouble with a few of our beer lines and gas pressure, beers are pouring pure foam or not at all. We have tried adjusting the flow rate under the taps and the gas pressure on the lines using a flathead. The ball on one particular line keeps dropping even though there appears to be nothing wrong. We also don’t have our beer cellar plumbed in so are getting a bit of damp, would love a quote and some solutions for this without a huge plumbing job. Thanks