22mm or 28mm direct from the meter.

messina1 · 11 Oct 2013

Hi all,Im thinking of installing a worchester bosch 42cdi in my kitchen on the extended side of my house.From the meter under the stairs to the position on the wall in the kitchen there is about a 2 to 2 half meter length.My question is whether the connecting pipe is ok at 22mm or should be 28mm as this would be quite a short run for the gas.
Any help would be much appriciated!

steve32 · 11 Oct 2013

You need to register and post this in the combustion chamber you will not receive a reply in an open forum

I assume you are an rgi and not a diyer

messina1 · 11 Oct 2013

Ok,will do thanks!
Im just keen for the information before I get an installer,fitter to get a quote.cheers!

messina1 · 11 Oct 2013

Oops,looks like I wont be able to do that!

Agile · 11 Oct 2013

Your gas reg. installer will be able to calculate the size of gas pipe required.

Why did you want to know yourself?

Tony

messina1 · 12 Oct 2013

Hi,just for my own curiosity I want to make sure whoever I get to install it knows what they are doing and also so the boiler works perfect.
Thats it!

Agile · 12 Oct 2013

It needs to be seen as depends on number of elbows!

Why don't you want to trust your installer?

All you need is to ensure the pressure loss is less than 1 mbar. You can ask him to demonstrate that to you but he can only do that if he has a digital manometer!

I like my customers to trust me!

Tony

ianmcd · 12 Oct 2013

Agile said:
It needs to be seen as depends on number of elbows!

Why don't you want to trust your installer?

All you need is to ensure the pressure loss is less than 1 mbar. You can ask him to demonstrate that to you but he can only do that if he has a digital manometer!

I like my customers to trust me!

Tony

Not actually the case, your installer could demonstrate this to you using a water filled u guage he doesnt need a digital one , and the normal way to test is using the boilers gas valve inlet pressure test point which the manufacturer states very clearly in the installation instructions that there shouldnt be more than a 2.5 mbar differential, personaly if you started asking me questions like that before I started the job then I d just walk awayl

messina1 · 12 Oct 2013

Gentlemen,thanks for your replys and information,as I said this is not a trust issue with regards the installer its me knowing for my own piece of mind,I don't think there should be a problem with a customer knowing something about the job that he is asking to be done.
I have the upmost respect for your profession,but it does not help if when you ask a question some of your colleges are prepared to walk away from the job,why???

ianmcd · 12 Oct 2013

Quite simply because when I give a quote it is to install the said appliance legally and to all current regulations and dont expect to be questioned on my professional ability by my customer

messina1 · 12 Oct 2013

Look at my original question.Does that question your professional ability?

Dan Robinson · 12 Oct 2013

messina1 said:
Hi,just for my own curiosity I want to make sure whoever I get to install it knows what they are doing and also so the boiler works perfect.
Thats it!

sooey · 12 Oct 2013

Dan_Robinson said:
messina1 said:

Hi,just for my own curiosity I want to make sure whoever I get to install it knows what they are doing and also so the boiler works perfect.
Thats it!

Click to expand...

Sadly, that's a legitimate concern for prospective customers to have. What else can you expect when there are so many cowboys riding about?

Agile · 12 Oct 2013

I am always very happy to explain everything to my customers and to demonstrate pressures and other aspects of the operating.

A digital manometer is needed in order to measure to an accuracy of 0.1 mbar

Tony

Galoka · 13 Oct 2013

sooey said:
Dan_Robinson said:

messina1 said:

Hi,just for my own curiosity I want to make sure whoever I get to install it knows what they are doing and also so the boiler works perfect.
Thats it!

Click to expand...

Click to expand...

Sadly, that's a legitimate concern for prospective customers to have. What else can you expect when there are so many cowboys riding about?

Exactly.

I reckon most people, if they have employed many tradesmen have had bad experiences with the quality of work sooner or later.And if they haven;t then they will have heard about problems their friends/family have had. Even a personal recommendation is no guarantee, as a friend who had some work done recently found out.

So for me, like the OP says, researching and understanding what a job is going to entail is one of the ways of making sure that the job is done in the right way. It's not impugning anyone's professionalism, just a way of protecting yourself.

For the OP, it's easy enough to find out the necessary info on the net anyway. The boiler installation manual will have the boilers requirements. The pipe sizing procedure is documented in various places

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22mm or 28mm direct from the meter.

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