Airlocks

[amfisted]

Just looking for a quick resume' on the techniques for dealing with airlocks. When the kitchen cold tap is turned off--its a mixer tap-- there's a loud banging from the pipework in the vicinity of the rising main. No other tap has this effect on the pipework. I've sort of learned to live with it but I'm also aware that long term, it could result in joints leaking.
Its been happening since I replaced the copper above the plastic main; I've tried turning down the incoming pressure but its made no difference. As far as I can tell, all the pipework is secured with clips.
Cheers.

 

[petit_pablo]

Doubt its an airlock unless you have a dead leg somewhere.

Check pipe clipping and clearances around the pipes. You could fit a shock arrestor too on the rising main.

 

[denso13]

If it only happens with the one tap that is probably where the fault lies. Check the washer/jumper if it has one. If it has ceramic cartridges perhaps swap with the hot and see if there is any difference.

Could also be the main stopcock washer/jumper but it would probably be noisy with other taps/ballvalves as well.

 

[amfisted]

Thanks for the replies. I was kind of angling towards it not being an airlock but I needed expert confirmation to make that opinion stick. :0)

Would have replied sooner but I spent most of yesterday afternoon fitting two new bathroom basin taps after one of the old ones became totally clogged up with scale. Not the only reason why I replaced it: whilst trying to take it apart I managed to gouge the chrome with my spanner. It took me a while to work out why the new taps wouldn't sit properly on top of the sink, until I realised that they were of smaller diameter than the old ones and only slightly bigger than the tap holes, meaning that the rubber washer was being pushed into the hole every time I tightened up the securing washer from underneath.