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so you have three different stopcocks(taps) to turn off cold water in your flat? I only have one and that turns off the cold water completely

Couldn't the problem of radiators which are hot at the bottom and cold at the top and noise in the system be solved by venting(bleeding) the radiators? Is the whooshing sound made by the boiler that leads you to think that there is a blockage in the cold feed pipe oilman?

Hi jelly, Do you mean you can't find a flexi-tap connector which is already connected to an isolating valve? Try a plumber's merchants/ supply shop or buy one online.

according to the readers digest diy book outside taps require a double check valve (as close to the new tap as possible), and washing machines require single check valves on hot and cold. Put isolating valves on the hot and cold washing machine pipes but there is no mention that you need one on...

You don't need check valves. You only need a rectrictor if the water pressure is too high, I believe. You just need an isolating valve on all pipes.

Just out of interest, is it an old house? Is the WC a recent installation? I'm surprised that the WC soil pipe goes across the house under the floor. It must be a very long pipe. I wonder how you would clear it if it got blocked. Presumably the WC isn't against the outer wall? It must be a...

will you be keeping the WC as well as the shower? Does the WC waste pipe go through the wall or down into the floor then through the wall? pete

So conventional boilers don't need to be turned off but combi boilers do if the cold water stopcock has to be turned off for any reason.

What is the best way of removing scale from a hot water cylinder, cistern and pipes? Or is there no alternative to installing new cisterns, cylinders and pipes if the scale in them is causing a problem Pete

thanks for the excellent info masona

sorry I misread what you wrote. I guess if he hasn't touched any of the gas side of things then there won't be a problem for a corgi registered person to come in and connect it up to the gas and commission it.

I may be wrong but I was under the impression that corgi registered engineers aren't allowed to commission work they haven't installed themselves. Pete

how did you get the scale off, taydo?

sounds useful. What is the url of that site please?

thanks for replying. If it is a combi boiler does if have to be turned off if the mains cold water supply is turned off?

Do you have to turn off a boiler when you turn off the mains water stopcock to do basic things like changing the washer on an upstairs bath tap and running off the water in the basin below to empty the water from the pipe? If you leave the bolier on isn't there a danger that the boiler will...

Taydo or anyone else, I don't understand how changing the washer helps the tap to open up or close off the flow of water. I thought washers in taps were just to prevent water leaking out of the joints in the taps. Surely if the tap is moving sufficiently up or down then it is doing the job...

why do tap connectors have fibre rather than rubber washers? Is fibre less likely to deteriorate than rubber?

It seems a good idea. Incidentally two of my last three jobs resulted in the mains stopcock having to be changed. it seems as though old stopcocks are fine as long as they aren't touched then when they are they may start to leak or not close altogether. For someone as inexperienced as me...

is sanitary silicone the same as silicone sealant? What sort of sealant do you use to fit a kitchen sink to the waste pipe. Under my sink there's lots of dark stuff around the joint. Do you know what that could be?