Does this job look legitimate?

[steve369]

Hi.

After a visit for a boiler service a plumbing company has presented me with the problem/solution below. They have been on Checkatrade for a few years and have good reviews, yet I thought I would check for some independent advice as it is a lot of money to part with. Does this look legitimate to you? The cost includes a mixer tap replacement for which we have the new one.

On inspection it was found that when using the boiler and hob together, the hob reduces the pressure to almost turning off the gas completely. We call this insufficient gas pressure.

I have checked the regulator on the gas meter and it is within 21 millibar +-2. This means it's ok as it's within the correct working pressure. This is to maintain gas flow when one or more appliance is on.

As this is ok, it is therefore down to the gas pipe sizing being incorrect and existing mild steel/ barrel pipe work.

In order to repair this we have to install a new gas run in copper from the gas meter in 28mm to the first appliance and then in 22mm to the hob, and then reconnect.

We will need a new meter union, copper and fittings to complete this. Once this is done, a service can then be carried out.

With regards to the taps, they require reducing connectors. These have already been obtained and upon second visit and are ready to install.

The total cost to complete all the above is £620. This will include all materials needed, taps being installed and service carried out. No deposit is required.

Let me know your thoughts and look forward to hearing from you.

Thanks very much for your time.

Steve

 

[ShaunCorbs]

In principle it sounds ok I’m guessing you have an old gas supply in the floor and a combi boiler has been connected to it ?

 

[Pickwickpick]

It does sound right, if the working pressure at the meter is ok but not at the appliance then its one of two things, either the pipes weren't sized appropriately to start with (which happens more often than it should) or there is a partial blockage. Had a job recently where corrosion in the old steel pipes was restricting the gas flow and had to repipe.

 

[steve369]

In principle it sounds ok I’m guessing you have an old gas supply in the floor and a combi boiler has been connected to it ?

yes, it is a combi and it does appear to be supplied in the floor
[automerge]1601656885[/automerge]
Thank you both for your replies.

Are we gas safe though, with the pressure dropping like this?

 

[Pickwickpick]

No, it definitely needs fixing. The description isn't 100% clear but if, as I am reading it, the pressure drop when the boiler is on is impacting the hob noticeably, to the point where it could cut it out temporarily if on simmer, I'd be putting it down as immediately dangerous and capping it. If it's just outside the allowable drop would still need fixing and would be at risk imo. With the caveat that have not seen it myself.

 

[steve369]

No, it definitely needs fixing. The description isn't 100% clear but if, as I am reading it, the pressure drop when the boiler is on is impacting the hob noticeably, to the point where it could cut it out temporarily if on simmer, I'd be putting it down as immediately dangerous and capping it. If it's just outside the allowable drop would still need fixing and would be at risk imo. With the caveat that have not seen it myself.

Thanks. If you're near Banstead you're welcome to visit and give us a quote along with a couple of other jobs.

 

[Scott_D]

You should only have a 1mb drop in pressure from the gas meter to each appliance.
it may Still operate correctly but it’s not to regulations and any warranty will be void.