New radiator in loft causing problems

[Stevemarch1969]

check valve not working or wrong way round, shut rad valves on loft rad, put hot water on only if no rads get hot then its check valve. if all rads still get hot then its 3 port valve. (not sure if you already done this). if it is check valve then maybe it has been manufactured incorrectly.

Thanks again.

I will try this tomorrow but from memory when loft rad shut off all is well. But will confirm tomorrow.

what/where is the check valve?

 

[jase158]

I think you would be best shutting rad valves in loft for now, if this prevents rads getting hot then as many have said, replace return pipework

 

[jase158]

Thanks again.

I will try this tomorrow but from memory when loft rad shut off all is well. But will confirm tomorrow.

what/where is the check valve?

non return valve

 

[Best]

The cylinder return should always be the last connection to the boiler, or you will get flow down the ch return.

You can, believe it or not, have the last tee connection on return anywhere on circuit before the boiler to be for radiators. No flow in rads will occur when hot water on if it is the ONLY tee off for rads return.
Heat can however, rise up the return pipe a bit if the pipe is rising from the tee towards rads, so pipe shouldn't be rising.

 

[Stevemarch1969]

non return valve

thanks very much for all your valued help tonight. It has been very very helpful.

will report back tomorrow night when I've tried the check valve out etc.

thanks again

Steve

 

[SafeGasInstall]

Steve you have played with pump ? Which way is your pump pumping ?

 

[Stevemarch1969]

Steve you have played with pump ? Which way is your pump pumping ?

There is an arrow on the metal body of the pump pointing upwards if that answers your question?

When I had the 3 port valve changed by a different plumber he suggested it "may" be upside down but wasn't sure.

I did mention this to the plumber i am using now (who is Gas safe) and hes said it was ok?

Is there a way for me to determine which way its pumping?

Thanks

Steve

 

[Megaflo-Experts]

Arrow on pump indicates direction - should be pointing towards your 3 port valve. Pump should be on the centre branch and "A" (on the valve) goes to heating, and "B" go to hot water.
I can't believe that's piped incorrectly, but it's worth double checking!

 

[Stevemarch1969]

Arrow on pump indicates direction - should be pointing towards your 3 port valve. Pump should be on the centre branch and "A" (on the valve) goes to heating, and "B" go to hot water.
I can't believe that's piped incorrectly, but it's worth double checking!

Arrow on pump body is pointing away from 3 port valve but I believe with some pumps you can rotate them on the body so maybe this is not necessarily right?if there is a way to confirm flow direction I will gladly check.

Looking at valve face on, CH is connected to left port and HW to right

Steve

 

[SafeGasInstall]

Arrow on pump body is pointing away from 3 port valve but I believe with some pumps you can rotate them on the body so maybe this is not necessarily right?if there is a way to confirm flow direction I will gladly check.

Looking at valve face on, CH is connected to left port and HW to right

Steve

steve is time to admit it all lol