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Kitchen tap would be mains. You seem to be saying that basin in bathroom is feed from CW tank. Is there a plastic mesh at the end of the spout. Remove this and clean as necessary. If this does not work turn off cold water supply from CWT. Remove cross handle, lever or head of tap then...

Try asking supplier for advice. Ph no is on website.

Why change ballcock if there is nowthing wrong with it? Drain some water uot of the systenm when it is cols and bend the long brass arm down so that the ballcock shuts off at a level just above the feed pipe. Should be a vent pipe over the F&E tank. What size is feed pipe?

Perhaps Softus. But there was a survey in the media yesterday about how poor young 20 year olds were at DIY. They have to rely on parents for basic things like plug changing etc.

When pipes are running at rightangles to joists, notches are cut into the top of the joists close to the walls to get the pipes down below flooroards. If they are not wide enough or deep enough the pipe may be in tight contact with the timber. When as pipes heat up they try to expand lengthwise...

Further to Kev's reply. There could be a problem if the ballcock adds water each time the system cools down and then overflows when hot. In this case water is being renewed diluting inhibitor. Ballcock should be set so that the level with the sysrtem cold is just a couple of inches...

Most TRVs are bidirectional and it doesn't matter whether they are fitted with the head horiz or vertically or whether on flow or return. Some aren't however and if fitted the wrong way can be noisy. Feel the two pipes at the ends of rad and identify the flow which should be noticeably...

air or gas from corrosion???

Cement paste is an alkaline material so will not be attacked by caustic soda. A strong acid will attack concrete but it will take some time to eat away the cement as well as being dangerous. A replacement trap is the way to go although if you take the trap off you may be able to dislodge or...

It was all one sketch but didn't appear as I had done it. Yep plate with holes seated in bottom of recess.

You're welcome but why replace both if only the wet one is leaking?

Do these end in a socket at or above floor level? I assume it is a solid floor? l_ _l l l If so you could possibly cut a piece of thin plastic sheet or thin metal sheet to fit the bottom of the socket with cut holes in this for your pipes. Seat this into the bottom of the socket...

This was not what was meant. The tap should be closed after the pressure is raised back to recommended value. What the poster was suggesting was that the loop was physically disconnected to avoid damage if tap was accidentally left open. In defence of the plumbers on this site (and i'm not...

Can you locate the motorised valves 3 port or 2 No. two port on your system. (if not familiar with these search for pics on web) These have sliding levers that allow them to be set manually to open. Do this for the one controlling HW run system and see what happens. Also check position and...

That's it. These caps should not be screwed shut in normal operation.

"air" may be hydrogen gas which is produced by corrosion. I've seen others recommend testing for this when bleeding off by using a lighted match but obvious danger of setting the curtains alight. Try capturing some in an upturned cup or tin (lighter than air) and applying a light with cup/tin...

Do as Kev says, change trap and dont wash your bucket and trowel in the sink. Use the dishwasher!!!!

surely its the tap body you undo not the gland nut to change the washer??

Hope it is what Chrishutt suggested. Another expensive possibility is a holed coil in the HW cylinder but in this event turning the heating off would not stop F & E tank overflowing.

Is the hot water coming out of the vent pipe (pumping over is common problem) or up the feed pipe into the F & E tank (unlikely)? It shouldn't be doing either. What is happening is that when the cylinder stat is satisfied it is closing the zone valve on the HW circuit. Water has nowhere to go...