Expansion pipes

mloc123

My heating system originally had two loops, we had a back boiler and oil burner... have since removed the back boiler and capped the pipes that went into it beside the chimney.

I am left with two expansion pipes into the supply tank in the attic now.. I assume it is fine to cap the second one that was originally on the solid fuel loop?

My reason being... I plan to T the supply tank feed into the other expansion pipe to avoid the system pitching. As is the system is okay but if I close off any of the TRVs it will pitch. If I T into one expansion pipe I assume the second will continue to pitch.

esox28

If you have identified which is feed and expansion is serving each heat source.! It would be fine to cap the solid fuel side if redundant.

if the system still continues to pitch or getting a cross flow circulation there maybe other issues i.e. F and e pipe work position, system blockage, pump position etc.

Maybe post some pics of hotpress and f and e tank for clarification.

mloc123

esox28 wrote: »

If you have identified which is feed and expansion is serving each heat source.! It would be fine to cap the solid fuel side if redundant.

if the system still continues to pitch or getting a cross flow circulation there maybe other issues i.e. F and e pipe work position, system blockage, pump position etc.

Maybe post some pics of hotpress and f and e tank for clarification.

I will get some pictures and a diagram together. The issue with the pitching is down to the feed pipe being on the wrong side of the pump from what I recall