Darryl Smith

Yeah, I couldn't understand why the isolation valve was on the wrong end of the manifold either. Yes there are flow meters which show that there's flow, red indicator at the top.

Hi Dave, I've done everything you've suggested and heat gets to the manifold and into the beginning of the infeed. The outfeed pipes aren't warm but that can be expected due to heat transfer. However, the floor doesn't get warm even leaving everything on for days. As an engineer I understand how the system works but don't understand how to isolate the return manifold. This is partly due to the fact that it's very difficult to trace where the pipes go in a 400 year old cottage. The circuitust have been filled initially so I'm assuming that the return manifold can be closed off. I've tried shutting off the Magnaclean unit and hooking up a hose, etc but when I shut off the supply from the hose, which should mean no water flow in the system, there's still water coming out of the return manifold. I can only assume that it's back flowing or syphoning from somewhere else.

Hi, I recently bought a cottage which has underfloor heating supplied by a combi boiler. It doesn't work. There are two zones as can be seen in the photo and I am going to attempt to flush the system which seems pretty straightforward. The problem that I have is that there's no isolation valve on the return (lower) return manifold. I'm not sure how to isolate the system and was hoping someone could have a look at the photo and give me some advice. Thanks in advance.