Hi,
The old part of our house runs a one-pipe heating system, and works reasonably well serving 3 bedroom and 2 floors. It has a grunfoss circulator that seems happy on speed 1 of 3.
The new extension has 5 radiators in it, and I've plumbed that as a standard two-pipe system.
I'm just thinking about how to join the two systems together.
* Should I fit an additional pump and then tee off the existing flow and returns (between existing boiler and pump) to keep the systems separate? A benefit here is that I could use the new pump as my zone control rather than having to fit a valve, but I guess it may be a waste of electricity?
* or would I be better off running the whole lot off the existing pump, and then install a gate valve on the one-pipe system so that I can balance it just like it's one big radiator?
I'm leaning towards the first option, but wonder if there's something I'm not considering?
Thanks
The old part of our house runs a one-pipe heating system, and works reasonably well serving 3 bedroom and 2 floors. It has a grunfoss circulator that seems happy on speed 1 of 3.
The new extension has 5 radiators in it, and I've plumbed that as a standard two-pipe system.
I'm just thinking about how to join the two systems together.
* Should I fit an additional pump and then tee off the existing flow and returns (between existing boiler and pump) to keep the systems separate? A benefit here is that I could use the new pump as my zone control rather than having to fit a valve, but I guess it may be a waste of electricity?
* or would I be better off running the whole lot off the existing pump, and then install a gate valve on the one-pipe system so that I can balance it just like it's one big radiator?
I'm leaning towards the first option, but wonder if there's something I'm not considering?
Thanks
Last edited: