Radiator Sludge

[denso13]

He’d already dismissed the importance of flow/return possibly being wrong way around.

It's plumbing basics, the flow should go to the top of the radiator in your situation.

 

[RainTown]

It's plumbing basics, the flow should go to the top of the radiator in your situation.

I’m not questioning the plumbing aspect.

In an earlier post, someone else advised me to go to local plumbers merchant, get their recommendation. Seemed good advice. That’s precisely what I did. That recommended guy has written “as you know a flush might help the situation”, confirming what he said on phone. I’ll give him credit for the “might”, the 2 other guys, who have both physically been in the property, said the powerflush WOULD help with much more certainty. Neither identified any flow/return confusion.

Guy today has the SAME info/images as shared here. Exactly the same. I’ve told him the gist of what’s in this thread. He says it’s irrelevant, dismissively, as the TRV is bidirectional.

Don’t you see my dilemma/position? I’ve not enough knowledge, what we call in IT the relevant SME, to judge if this or that course of action is wise. So I ask a few local “professionals”, and in this forum. I get, at best reading, mixed & contradictory advice. Not a little bit contradictory, but polar opposite contradictory. Eg try to square:

“flow/return connectivity isn’t relevant”

with

“It’s plumbing basics”.

 

[RainTown]

That’s the before picture, the previous Volkera Compact 24 Boiler. All 6 pipes went straight down vertically under the floor. All were cut above floor level and rerouted to the new boiler. I’ve fotos of the “after” so I should be able to map those 6 pipes to the current connections on the new boiler. Establish if flow/return were inadvertently “swapped” by the Baxi installer. Unfortunately there is now an integrated oven / microwave / kitchen unit where the old boiler was, or else I could just look.

The after picture.

 

[endecotp]

Volkera - left two pipes are return and flow, respectively.

Baxi: leftmost pipe is flow, rightmost pipe is return.

WRONG.

 

[denso13]

He says it’s irrelevant, dismissively, as the TRV is bidirectional.

It has nothing to do with the valves, they are irrelevant. It only confirms your new plumbers misunderstanding.

The flow should go to the top, look it up if you like.