Recent content by thechasman

Is there a way to tell without tearing the floor up?

Okay we've flushed all the upstairs rads. The ones closest to the header/expansion tank, hot water tank and and pump had the most sediment. Fine black stuff in suspension. The one's at the opposite end of the building were mostly clear apart from one really old one which had flakey black...

"Your system has a fault!" Agreed. So... 1) Check ballcock not taking on fresh water all the time. 2) Get water tested periodically for dilution of the rust inhibitor. 3) Check header tank for sediment. 4) ??? We are installing the Aladdin HV30C Autovent bleed valves in all...

I gave one answer from memory so, naturally, it was wrong. The hot water tank is green and has a label saying "Grade 4". Or did you mean the header tank?

"The reason for no coating on the insides of the radiators is a simple one... if you put plastic on the inside for example, then how is the heat going to transfer into the metal of the radiator to actually give the heat off? The job of a radiator is to LOSE heat, not keep it in. Any coating you...

"If there is a fault, fresh water may keep being added, or the water may be pumped out of the vent pipe, which speeds corrosion." Thanks, I'll look into that... I'll get an inhibitor test kit and sample once a month to see if it's diluting. "You have a particular problem, which must have a...

Not being funny but everyone answered my PS but ignored the question...

Nope. 16 rads, he was in and out in half a day.

Why don't radiators have a corrosion resistant coating inside? I've seen dozens of posts on all plumbing forums about sludge, pin-holed radiators, oxygen/hydrogen problems, etc. Surely removing a large proportion of the exposed metal surfaces from the systems would solve most of this? With...