New builds zone valves on combi

[Ricardo Napoli]

Hi everyone, if anybody is out there that can give a little help would be great. I’m going from domestic plumbing into house bashing end of the month now I’ve been told the heating on new builds is zoned off even on combi boilers. Could anybody just shine some light on how to pipe this system up. The zone valves would be in a cupboard upstairs. Thanks.

 

[chris watkins]

We're supposed to have lives outside of our careers? Can someone please tell my boss that . You are right though, they do keep changing, they need to make their mind up and just stick to it. Trvs for example, when changing a boiler, used to be recommended, then went to mandatory and now back to strongly reccomended. You can understand when changing a rad that as a drain down isn't required you can't force the customer to have a trv. But why it isn't mandatory for them while the system is drained for a boiler swap is just stupid.

I am sorry Craig but where does it state TRVs are only recommended ?
a. Each space heating circuit should be provided with:

1. independent time control, and either:
2. a room thermostat or programmable room thermostat located in a reference room[6] served by the heating circuit, together with individual radiator controls such as thermostatic radiator valves (TRVs) on all radiators outside the reference rooms, or

individual networked radiator controls in each room on the circuit.

I can't ever remember a time there couldn't be installed if they were not where before.

You are the pro's guys, why is it so difficult to say up to date with what is required ?

The link I posted is the proper current Part L requirements, it just requires a small amount of reading.

I am not being funny bogrodder but why would you be relying on an architect to tell you the requirements for a heating system? I can understand your frustration with BCO you should know but seem to no be interested in any of it.

 

[Aire]

Page 19 of your document. When replacing a boiler, upgrading to trvs is only deemed good practice and isn't actually a requirement.

 

[Mastermixlee]

As Craig has just said above. For existing central heating systems if the boiler is changed then its only classed as good practise to fit TRV's and. Not a requirement as per table 4.

I have uploaded the snapshot of the document as some may find it useful.

It does however state that if a new heating system is installed (even if existing pipework is retained) then it does require TRV's to be installed on every radiator that isn't a reference room (one with an interlocked thermostat control).

Which I'm assuming would be the scenario where the boiler is being changed and new radiators etc at the same time utilising the existing piping that is already in place.

 

[Mastermixlee]

Then again it does also state in the document that every system should be flushed through thoroughly before a replacement boiler is installed... And that seems to often get avoided by many to offer a cheaper quote and win a job which also voids customers warranty on the boiler.

 

[Riley]

I think based on all the contradicting and conflicting opinion we can probably agree that until the profession is correctly policed then you are going to get constant discrepancy and differing opinion of what is a nice to have and what is mandatory. I would love to see this job licensed the same with gas. None of this “competent” rubbish if you haven’t got the ticket you can’t do the work. Simple

 

[chris watkins]

I am sorry Craig but where does it state TRVs are only recommended ?
a. Each space heating circuit should be provided with:

1. independent time control, and either:
2. a room thermostat or programmable room thermostat located in a reference room[6] served by the heating circuit, together with individual radiator controls such as thermostatic radiator valves (TRVs) on all radiators outside the reference rooms, or individual networked radiator controls in each room on the circuit.

I can't ever remember a time there couldn't be installed if they were not where before.
You are the pro's guys, why is it so difficult to say up to date with what is required ?
The link I posted is the proper current Part L requirements, it just requires a small amount of reading
I am not being funny bogrodder but why would you be relying on an architect to tell you the requirements for a heating system? I can understand your frustration with BCO you should know but seem to no be interested in any of it.

"Hoist by his own Petard" I think is the correct response here Craig! You were quite correct & I was wrong (very red faced ).

It is a good job I no longer teach the Part L and I promise to do CPD on it in the future.

Just to be clear that the option to not install TRVs (or similar) applies just to a straight boiler swop only. If it is a new install or heating pipework is altered or rads are replaced they must be added.
Sorry Craig, (I am sitting here stuffing my face with humble pie)

 

[Aire]

You have nothing to apologise for Chris. Enjoy the pie though

 

[chris watkins]

You have nothing to apologise for Chris. Enjoy the pie though

............................. Oh........... but.........I................do. . .. . . Craig ...
& I am absolutely stuffed... can I stop now.

Every days a school day.

 

[Sharp Point]

I am not being funny bogrodder but why would you be relying on an architect to tell you the requirements for a heating system? I can understand your frustration with BCO you should know but seem to no be interested in any of it.

What do you currently do for a living Chris?

 

[chris watkins]

What do you currently do for a living Chris?

Anything I can, but had to give up the street corners, in the end I was paying them

 

[Sharp Point]

Don’t need riddles, what’s your employment? Have you ever been on the tools?

 

[Harvest Fields]

Anything I can, but had to give up the street corners, in the end I was paying them

Didn’t realise that was you. Cheers for the money mate.

 

[chris watkins]

40+ years, how about you ?

 

[chris watkins]

Didn’t realise that was you. Cheers for the money mate.

It was after you I gave up.

 

[Sharp Point]

40+ years, how about you ?

Still talking riddles chris

 

[Harvest Fields]

Still talking riddles chris

I read that, as he has been on the tools 40 + years?

 

[Sharp Point]

I read that, as he has been on the tools 40 + years?

Great. Now what’s the answer to my other question?

 

[Harvest Fields]

Great. Now what’s the answer to my other question?

Maybe he doesn’t want to tell you? I heard he picks peanuts out of poop and the local
Zoo? But I have been wrong in the past.

 

[Mastermixlee]

Some say he isn't machine washable, and all his potted plants are called Steve... all we know is, he's called the Stig.


Oh wait... Chris Watkins* ... Hes called Chris Watkins.

 

[chris watkins]

Some say he isn't machine washable, and all his potted plants are called Steve... all we know is, he's called the Stig.

Stig is me twin bro, all mine are call Cedric as I like sages.

 

[Sharp Point]

Chris Watkins sounds like a modern day ‘pimpernel’ by all accounts.