Radiator advice

[kleed]

I've installed a towel radiator in the upstairs bathroom 1metre off the floor, it bleeds fine with no air but the water doesn't circulate so the rad stays cold.
I've tried turning all other rads off in the house but no good.
Any ideas?
It's a gravity fed system btw

 

[bengasman]

You've plumbed it in wrong

 

[ChrisR]

You'll often find modern rad valves are too restrictive to get enough flow on a gravity system.

And it might well be plumbed in, er, sub optimally

 

[kleed]

You'll often find modern rad valves are too restrictive to get enough flow on a gravity system.

And it might well be plumbed in, er, sub optimally

Thanks for that, although i don't think it's plumbed in wrong....the inlet and outlet are on the same way as the previous convector radiator that was there.

Interesting you should mention modern valves being restrictive 'cos the inlet pipe gets warm up to the valve, but as mentioned i turned off all the other rads in the house you'd have thought there would be enough pressure to push the water through?

 

[D_Hailsham]

the inlet and outlet are on the same way as the previous convector radiator that was there.

Are both valves open?
Have you rebalanced the system?

 

[Biguns]

Turn the valves off one at a time and see if it still bleeds

 

[kleed]

the inlet and outlet are on the same way as the previous convector radiator that was there.

Are both valves open?
Have you rebalanced the system?

There is only adjustment on the flow valve not the return.

Not sure what 'rebalancing' is (excuse ignorance) if it's turning all the rads off and then with the boiler fired up, opening the flow valves to reach a decent temp on each valve - then, yes i've done that, all ok apart from the towel warmer

 

[kevplumb]

might be an idea for you to define what you think is a "gravity system"

thats not a poke btw

 

[kleed]

might be an idea for you to define what you think is a "gravity system"

thats not a poke btw

.....got a conventional boiler, an expansion tank in the loft, a pump and a motorised valve (CH/HW) by the immersion heater

 

[kevplumb]

ahhh thats a fully pumped system then

View media item 11149
with one of these

is there one of these near the pump / valve

View media item 11231

 

[kleed]

ahhh thats a fully pumped system then

View media item 11149
with one of these

is there one of these near the pump / valve

View media item 11231

This:

Untitled

• kleed
• 27 Aug 2010
• 1

And this is the radiator:

Untitled

• kleed
• 27 Aug 2010
• 1

 

[D_Hailsham]

This:

Untitled

• kleed
• 27 Aug 2010
• 1

The air valve is the thing on the end of the pipe sticking up on its own between the cylinder and the motorized valve.

The valve should be above all radiators. I suspect that the valve is below the top of the new rad.

Is the air valve done up tight? It shouldn't be, otherwise any air cannot escape.

 

[kleed]

This:

Untitled

• kleed
• 27 Aug 2010
• 1

The air valve is the thing on the end of the pipe sticking up on its own between the cylinder and the motorized valve.

The valve should be above all radiators. I suspect that the valve is below the top of the new rad.

Is the air valve done up tight? It shouldn't be, otherwise any air cannot escape.

Ok this might be the problem. Does it need to be extended?

Plus yes it is tight - if i loosen it to bleed the system first any air then water comes out

 

[joop1977]

There is only adjustment on the flow valve not the return.

Are you sure? On some valves you have to remove the top and adjust with an allen key.

 

[kleed]

There is only adjustment on the flow valve not the return.

Are you sure? On some valves you have to remove the top and adjust with an allen key.

Eurika!!!!!
GOOD CALL IT WORKS!!!

Many thanks to all!!!!!!