New boiler - Radiator valve fitted instead of bypass valve - is this legit ?

[interesting100]

Hi
I have recently had a 24Ri boiler fitted to an older system
It needed a bypass valve fitting to allow the pump to run on after the boiler is turned off to help the boiler cool down

Instead of a differential bypass valve, the plumber has fitted a radiator valve, (opened 2 turns out of 4.5) to a 15mm bypass tube between the flow and return pipes, to bypass the valve.
Its an Eclipse BS2767

Is this a legit thing to do? or will it reduce the efficiency of pumping water round the system, if it is always partially bypassing

This is now extra relevant as we are adding rads to the second floor, so any loss of pressure is undesirable

advice appreciated

 

[Howsie]

It'll do some of the job but its not right. Why didn't he fit a bypass?

 

[Meady]

He probably didn't fit it cos it was cheaper to supply a single rad calve than a by-pass

 

[interesting100]

I can see that its £20 cheaper - but is it an incorrect thing to do, regs-wise ?

 

[Howsie]

Follow the manufactures instructions is the right thing to do and no excuse for fitting what he has.

 

[Meady]

I'm not saying its right because its cheaper, just it's probably the reason he did it.

 

[Meady]

I'm not saying its right because its cheaper, just it's probably the reason he did it.

 

[gassafe]

Do you have a s plan or y plan system?

 

[AWheating]

sounds like the plumber is either a penny pincher or needs to update his brain on the regulations.

 

[interesting100]

It is S plan, with 2 x two port valves
My main concern is that it will reduce the pressure to get the HW to the second floor

 

[phpaul]

does the boiler have a byass built in all vaillants do

 

[Howsie]

24 is a WB, no?

 

[interesting100]

Yes it is