2 port on UV cyl return

[gassed up]

Any thoughts on putting a 2 port on a megaflo return, which has a 3 port only set up.

There is no room or pipework space to get it on the flow to cyl after the 3 port. Whoever fitted it must have thought the 2 port was a billy bonus for stock.

My thinking is better on return than not at all.

 

[jtsplumbing]

Best bet is to ring Megaflo, cover your backside B4 you do anything

 

[townfanjon]

All unventeds set up on a Y plan, should also have a 2 port wired in.
Best thing is always to change to S -plan in the first place

 

[Worcester]

To keep life simple You could simply wire the 2 port into the overheat stat using a permanent live, that's what they are both there for.

Or replumb as S-plan with the overheat stat in series to the cylinder stat.