Shower temp fluctuating after new radiators installed - plumber says not his work?

[Harry Bloomfield]

Highly unlikely to be anything whatsoever to do with fitting new radiators/ taps/ showers.
It's invariably caused by a build up of magnetite within the primary circuit of the plate hex.

Could the cold water flow perhaps be restricted, as in the stop valve not having been reopened properly?

 

[terryplumb]

Could the cold water flow perhaps be restricted, as in the stop valve not having been reopened properly?

That would result in lower flow rates from all taps ,somewhat higher temperature of hot water at taps ,but not the hot/cold repeatedly cycling Harry.

 

[terryplumb]

It would be a little coincidental when it didn't do it before and has now just started it since the new rads were installed. Could some sediment/crud that was sitting in the pipework/rads have been picked up by the drain and fill and it then ran itself into the plate HEX by the rad work, I could certainly see that as being a possibility. Hard one to prove though.

Is there a system filter and how clean is the system?

Its a possibility ,but highly unlikely in my opinion. Anyways if the system contained such crud ,that could hardly be attributed to the plumber .

 

[Madrab]

Been there, seen it and done it a couple of times unfortunately. Luckily it was found as part of our systems testing post install and only took a back flush of the plate to clear it both times. The usual black flakes blocking the plate inlet.

that could hardly be attributed to the plumber

It's one thing I always consider now, especially if the system was looking dirty and would certainly highlight it to the client as a possibility. I would even recommend at least a mains flush as part of the radiator install works, if the system required it. Could avoid possible issues and callbacks.

I would consider that as part of a 3 rad install work TBH, if it was needed and priced accordingly of course.

 

[BlueLoo]

Its a possibility ,but highly unlikely in my opinion. Anyways if the system contained such crud ,that could hardly be attributed to the plumber .

You would think that isolating the boiler might be thing eh?

 

[A1983]

Just seen this pipe to side of house!! Could this be related to the hot water/boiler?! It's been broken by the building materials that were propped here during the build. Thank you

 

[Madrab]

Just seen this pipe to side of house!! Could this be related to the hot water/boiler?! It's been broken by the building materials that were propped here during the build. Thank you

Nope, it just means you have condensate running all over the place, wouldn't affect the boiler really as long as the condensate doesn't back up

 

[terryplumb]

Is the boiler on the other side of that wall ,the pipe that's broken may be from a basin ,what is on the inside wall , in the vicinity of the broken pipe ?

 

[A1983]

Yes the boiler is on the other side of that wall

 

[A1983]

That's the only thing, and the stairs, no radiators or bathrooms