I have had 5 new radiators installed and a towel rail in a bungalow and all new associated pipework. I also had a new cylinder and pump installed. Some of the radiators get warm at the top and not the bottom and a couple get warm at the bottom but not the top. The towel rail gets warm at the top but not as hot at the top. We have bled them and it helps for a few days only. The plumber has said it is air and it should settle down but its been 3 weeks since the last work was done. Does anyone have any ideas on what the problem could be? I have a conventional boiler. Thanks
