cannot heat new instaled radiator

[DiSlater]

Hi there I have just installed two new radiators and can only get one to heat up have bled the second one until warm water comes out but the minute I stop it goes back up the pipe to the loft. I am heating it with a solid fuel range stanley 5 with wrap around boiler, I live in a single storey and alread have three working radiators each radiator approx 4 ft x 2ft it also heats are hot water, please help its driving me made have been on this now for 4days dont know where I`m going wrong.

thanks Di

 

[hi-spec plumbing heating]

shut the others down untill the cold one get hot then reopen the others
system should be balanced when all rads are getting heat.

 

[holty]

could be the design of the extra pipework and rad. if its a gravity primary circuit then hot water will always convect to the highest point. you may need an anti gravity valve if so

 

[DiSlater]

Thank you very much don't know how to thank you enough, the whole family are well chuffed ( not to mention lovely and warm) really good of you,

thanks again Di

 

[hi-spec plumbing heating]

Thank you very much don't know how to thank you enough, really good of you,

thanks again Di

thanks ok where do i send the invoice.