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Good spot! There's none of the pipe underground. This is in our attic, and we occupy the top two floors of a 4 storey Victorian building. It heads out the back of our attic, down one story to the bathroom (I imagine), maybe 2-3m of it outside against the wall? Yep, this has definitely wasted a...

Traced the cable back and it's wired up directly to mains inside a backbox with a 13A switch screwed on top (no wire is connected to the 13A switch)... I guess someone really didn't want this pump being turned off. What are the risks involved with disconnecting this pump and turning off that...

I just read up on why you'd want a secondary circulation and it makes sense. When hot, our water does come out hot almost instantly. However, it's not been well insulated at all and it even goes outside (!?), so I can imagine this is drawing off a LOT of heat.

I think you're on to something John... When I close that isolator valve the pump does change pitch. That pump does run constantly, which I had thought is a bit strange. It's connected to a pipe that heads outside (see first post), and then back into the inlet with the isolator valve. The...

Are you referring to this (image attached, red circle)? Or the pipe that I drew a red line over in the first post? If you're referring to the thing I've circled in red, that does indeed seem to be a motorised valve, and it leads to the central heating loop. If you're referring to the pipe...

Thanks John! Yep! The valve direction seems to be out from the primary flow pipe into the primary return pipe. Images attached.

Hi everyone, looking for some advice. We had a plumber/heating engineer come round and take a look, and they just sent through a quote for an entire system replacement which might be ideal but we'd rather fix what we've got if at all possible. I've attached some images of the setup we have. It...