[jeffod]

any plumbers out there can give me some advice on moving radiator pipes with a condensing boiler ??
basically i have knocked my toilet and bathroon into one room,i have already removed the rad from the wall which was and this has left me with the 2 pipes sticking up in the middle of the floor so what i really need to know is how to shut the water off so i can cut the pipes and move it all to the other side of the room without flooding the place

[Joe90sDad]

Turn the boiler off and then drain the system. Presuming your bathroom is upstairs, you'll only need to drain enough so the top floor pipes and rads are empty.
You should have a drain cock installed somewhere on the ground floor rads or pipework to do this.

Oh...and open the air vents on the top rads to help the water drain properly - not straight away though, only once the pressure has been released.

[jeffod]

thanks mate.
i thought i had to turn all the taps on to get rid of the water ??

the drain cock,i know what you mean,that has been a problem before i think as i dont have one on any of the ground floor rads that why im a bit stuck as i dont want any water pouring out as soon as i cut the pipe

how would i do this if i dont have the drain point ???

the condenser is an 'ideal azar' if that helps

thanks again

[Chris Muriel]

There should be a drain point somewhere near the bolier itself, usually with a slightly tapered part to which you can attach a hosepipe.

Some info :
http://www.diyfixit.co.uk/diy/index..../draining.html

Picture : http://www.toolstation.com/?r=s&feature=37798

Chris Muriel, Manchester

[jeffod]

thanks for the links chris.

i will have to have a good look tomorrow night when i get in from work but im 99% that i dont have a drain point on the rads!!!

[Joe90sDad]

Sorry, didn't have my head screwed on. Saw 'condensing' as Combi. In any case your model is a Combi so the above is still correct.

You don't need to drain your taps, that's not connected to your central heating system. The water in the heating pipes is separate and sealed.

Normally the drain cocks are fitted inline with the pipes going to the radiators or along any exposed pipe runs at the lowest possible point but if you don't have any, now might be a good time to stick one in.

Some DIYers and even plumbers will manually turn the PRV (pressure release valve) in the boiler to drain the system but it's not recommended as crud can get on the seal and cause it to leak. The PRV is like a safety valve which ejects the water in the system into an overflow pipe if the pressure should go over 3 bar.

[scooby do]

Or get yourself a bung kit, put this in the header tank in the loft (the smaller one) of the two. This way you should not need to drain the system right down as long as your system is in good order i.e. no leaks else where. Please note doing it this way you will get weeping when you cut the pipe but should not be nothing major. And of course only do one pipe at a time and maje sure once donw you seal properly before cutting the other pipe. This method works fine (suck straw and put your finger over the mouth end without looseing pressure principle) but obviously could go wrong if the bung is not tight fitting. Alternatively have a check on the outside of the property sometime there is a dead leg which is the drain point.