Newly Added Radiator won't get hot

[leakydave]

Can you turn pump speed up to III and close all other rads? Do your new pipes go up before they go down?

 

[45yearsagasman]

Post a drawing of exactly how you piped it up. All this guessing is doing my head in.

 

[Happyplumber]

Drain the system down and fit a drain off of to one of the pipes
Refill the system and bleed all rads and start theheating
Now put a hose pipe onto the drain off and.open it slightly also open the filling. Loop and get a happy medium where u are draining the water as.well as filling the system so it.stays above 1 bar and.wait till the pipes get hot .if there are any blockages or air locks you will know

 

[jedi]

Disconnect newly installed rad.. Power up heating system, open each new valve in turn, do you get water flow from both ends?

 

[Dan Robinson]

What difference will turning the heating on do?

 

[jedi]

Run the pump?

 

[Biggles..]

Burn your hands when the water hits it

 

[jedi]

Not if your wearing these.......

 

[Dan Robinson]

And the pump has to run in order for water to come out of the open valve?

 

[Dan Robinson]

You could always try putting those marigolds on you head then stick it into a pan of boiling water.... See how long it doesn't hurt

 

[Tony DIY]

tried fitting a one way flow valve in the new rad pipes in both directions
Tony

What do you "mean in both directions"?. Whatever the snswer, take them off again - they are more likely to get blocked in time than help the situation.
As I read the OP, my immediate thought was teeing off the same pipe. Are you SURE you gave a flow and a return?
Other 2 options are a physcial blockage or air - could be a lump of wire wool or even sabotage at the merchants. If you pushed pipe along under the boards you can pick up garbage. Does the pipework have a high point?

I have taken out the one way flow valve as I didn't like having it in for nothing or making situation worse. Haven't come across wire wool, unlikely as we cut up all the pipes manually at home from 3m lengths.

 

[Tony DIY]

What do you think of going straight from 22mm pipes to new rad ?
Should not be neccessary

Water seems to flow in new 15mm pipes so must be getting through.

Filling a circuit is not the same as circulating. You can fill through a partial blockage, but the resitance will be too great to circulate. Hence Dan's obseration and my suggestions.

I thought wouldn't make a difference but tried so many other options.

 

[Tony DIY]

Ok, stupid question time but here goes. Is the bleed valve blocked or faulty? Have you tried removing it? (I'm not sure from your original post whether you managed to actually fill the rad).

new Rad bleeds no problem.

 

[Tony DIY]

Is the water pressure high enough? is it a brand new or second hand Rad (does it need a power flush)

Water pressure seems pretty good as gets to bathroom towel rad, which is highest point of system. The rad is newly new but have flushed it out with hose, no rust or dirt in it.

 

[Tony DIY]

Can you turn pump speed up to III and close all other rads? Do your new pipes go up before they go down?

Not tried the speed pump, this is in the boiler which is new from last October; the new pipes go horizontal across from existing bathroom rad 15mm flow and return pipes then go straight down to new rad on kitchen corner below.