Current gas boiler has 15cm feed

Sue_S

We've been told that when we replace the boiler with a new condensing boiler (which we don't want to do but our 20-year-old current boiler may be dead...) that we'll have to have all the piping from the gas meter replaced with 22cm piping.

The gas piping goes under our patio/path the full width of the house, then comes into the kitchen about 4 metres away from the boiler. This is going to be major work and expense!

Is there any way round this?

Thanks for any help/advice.

MX5huggy

Move the boiler location. Or run the new pipe along the wall outside.

casper_g

Sue_S wrote: »

22[STRIKE]cm[/STRIKE] mm piping

Fixed it for you.

Gloomendoom

I've got the same problem. I can't argue with the boiler manufacturer's recommendations, however, I don't understand why my new boiler that should use half as much gas as my old one needs a supply pipe twice as big. :huh:

Sue_S

casper_g wrote: »

Fixed it for you.

Thanks for that, I knew there had to be an easy solution:rotfl:

keystone

Its all about flow rate and no there isn't a way around the core requirement to upgrade the supply pipework. As suggested find another route if the current one is inconvenient.

Cheers

gas4you

What boiler are you having fitted?

If it happens to be a combi, then the distance you describe sounds as though 22mm will not be big enough.

Sue_S

gas4you wrote: »

What boiler are you having fitted?

If it happens to be a combi, then the distance you describe sounds as though 22mm will not be big enough.

No, it won't be a combi. Luckily it won't be anything at the moment because my boiler has been fixed :jbut the problem is going to rear its ugly head in the next few years...

Thanks everyone for your help.

ukjoel

We had our combi replaced last week with a new one. We had the same issue but I did a bit of research and it turns out you dont need to upgrade from 15mm to 22mm unless there are issues with water pressure. Also its possible that just replacing a portion of the pipework will often lift the pressure so its doesnt all need to be done. We had a new vaillant combi put in, certificated, powerflushed, and a new vaillant wireless thermostat all put in for £1450. Guys arrived at 7.30am and were done by early afternoon. 5 year warranty on the boiler as well so Mrs is very happy.

British Gas quoted £2400 (if we signed up on the day).

John_the_Boy

Just had my boiler replaced - what hassle!

Firstly check if the gas pressure can be increased at the mains - if you only have a small amount of thin pipe it might just be ok, the larger the boiler the less chance this option will work. It was borderline for me so I was advised to upgrade the pipe work (no extra cost so it wasn't a sales pitch). If it can, you just ring up the Gas emergency line and report a low pressure problem and they come out within two hours (didn’t like ringing the emergency line but apparently this is the only way). Got my gas pressure up a couple of points but just not quite enough for the size of boiler I wanted.

In the end I had a pipe up the side of the house through the loft and down the back to the boiler. British Gas (expensive I know) include this as part of the price but I was quoted approx £600 - £1000 by a local gas fitter so in the end it was only a little dearer to go with British Gas.
Have to say they did a reasonable job in the end.

Hope the above helps.

Mankysteve

ukjoel wrote: »

We had our combi replaced last week with a new one. We had the same issue but I did a bit of research and it turns out you dont need to upgrade from 15mm to 22mm unless there are issues with water pressure.

Nothing to do with water pressure it do with gas pressure. As the above poster says it may be able to get around if you can get them to take a reading at the end of the pipe run and see if its high enough for the boiler.