Boiler question

heating-eng

Leif wrote: »

Thanks southcoastrgi and Ted. I have emailed Worcester Bosch customer support to clarify the pipe size issue i.e. what are the consequences. The plumbers have replied, and they have offered to inspect and if necessary replace the pipe. So that is a good response. I suppose it could go straight though the wall, and then run down the wall to the meter, leaving the existing pipe in place behind the kitchen units. It would not be hard for me to patch and paint the damaged area of kitchen wall.

It's very clear in the instruction ,no need to contact WB, as I have said phone GasSafe

keystone

Hello AH - back again then? Nice to see you.

Cheers

southcoastrgi

heating-eng wrote: »

Undersized gas is classed as AR if it affects the appliance
You need to contact gassafe and ask them to come out and check the installation.
Did the plumber register the boiler ?

heating-eng wrote: »

It's very clear in the instruction ,no need to contact WB, as I have said phone GasSafe

There is no proof that is was AR when they installed it, but what is certain is if the gas pipe is only 15mm then it was installed to NCS, I know the MI states the boiler needs a min of 18mb at the test point but given the fact that you could have 19mb (or could have been 22mb at the time of the install) at the meter 1mb loss on the pipework & a possible 3mb loss on the GV I would be surprised if WB classified it as AR at 13mb at the GV (I haven't spoken to them & stand to be corrected if I am wrong).

cyclonebri1

Leif, I have the same issue.

My boiler is 16 years old and has had low gas pressure for the whole of that time.
I don't know the actual pressures but it runs vertically from the incoming main and across the house in 15mm pipe for about 12 to 13 metres, only the drop into the utility is in 22mm. I can only guess that 16 years ago the installers weren't as well educated as they are now.

I'm going to get a new main run across the house this summer, not too difficult in my case, and a new boiler fitted.

I have to admit it ain't right by a long chalk, but it was checked by a corgi guy about 8 years back and said the combustion appeared OK but advised I get it sorted.

Being a tight git and given the fact that it had worked OK for a number of years I didn't take action.

Not advising you at all, I'm wrong in not sorting it, but I'm still here.

Leif

Thanks cyclonebri1, hopefully when WB get back to me, I will know that the consequences are, and whether or not there are any real dangers. And that will give me some bargaining power with the original plumbers, in case they try to fob me off with technobabble/plumbobabble. If WB say that heating costs will be 20% higher, for example, then that is a reason to fix it.

southcoastrgi

Leif

I have spoken to WB today, 1mb drop across the pipework & 1.5mb drop on the GV so the working pressure at the boiler should be no less than 16.5mb (assuming 19mb at the meter), they DO NOT consider it AR & it is not un-safe, it means you won't be operating the boiler as it was designed & will give you less output than you could have (the WB engineer was correct), however it is NCS as I said due to the wrong size gas pipe being used (see post #9), so depending when it was installed either get them back to do the job properly (foc) or you could ask GS for a free inspection in which case they will prob get the installer back for you.

Leif

Thank you southcoastrgi. Good idea about Gas Safe, I think I will do that.

Leif

A quick update. The installers said they'd come round yesterday morning. They did not show up. Apparently the chap was ill. So he came this morning, and put in a new pipe, straight through the wall, and down the outside to the supply. He offered to send someone round to repair the plaster, but being retentive, I'll do it myself. Thanks again for the advice. I was pleased they agreed to rectify the work without argument.