I stupidly forgot to label the flow and return pipe before my floor screed went down in my new extension. System was partially in use so I drained and thought I’d correctly identified the return by slowly adding water to the system (fill is attached to the return side) until water came out of one of the pipes new pipes having taken all the end caps off.
Radiators all on, lovely jubly, the entire house is warm… finally!
Except…. It seems like some how I’ve got it wrong identifying the returns as I’ve now got my lockshields on the warmer pipes attached to the rads (ie the flow side).
So, I understand that a tiny air bubble in a mostly closed lock shield could in theory stop the flow. Does this really happen?
My TRVs (Drayton TRV4) say that they should be installed vertically on the flow side, or horizontally on the return side, indicating that the valve that shuts off the water flow is designed to work in one direction.
My TRVs are definitely doing their job despite being on the “wrong” side. Should I worry about this or do the job properly and drain the system and swap them all round?
thanks in advance for any advice.