Gas inlet pressure at boiler

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Just had an annual service and the pressure is below the manufacturer’s recommended minimum level. Level is not tallying with what the original installation levels were recorded as.

Am I going to have to get the floor ripped up to get a bigger pipe? It’s currently a 22mm pipe. Just trying to learn as much as possible before the next engineer arrives.

It’s a how long is a piece of string question. Could be down to a leak (let’s assume not or you’d smell it). Pipe degraded. Original installer lied. Installation of extra pipe at some point introducing more legs? Something causing increased friction somewhere. You’re gonna need a gas safe person out.

Thanks. A gas safe engineer is attending next week. But the original man was also a gas safe person. Who can you trust?! I’m trying to find out if the best way to progress would be a power flush of the system to see if that clears any blockages because I doubt the installer actually did what he said. How do you determine what the problem is?

Hang on. Are you talking about the gas pressure or the water pressure? Very different things. You said gas inlet pressure in the title but? You can’t power flush the gas. If it’s a new boiler install then the engineer will have done a flow rate test and if not within specs wouldn’t or at least shouldn’t have commissioned it. If you are talking about the pressure for the water in the system then that is a different question.

Gas inlet pressure. Yes I believe the engineer filled out the figures on the safety sheet incorrectly. I also suspect he didn’t do any of the aspects of the job like the magnacleanse flush etc because the service engineer said the filter was extremely dirty (I used a different company for the service). Apparently the installer no longer works for the company so they are sending another person. It’s still under the installation guarantee. I just want to know what to expect because I hate dealing with these guys and I’d like to avoid my floors being taken up if possible.

The flush in my experience is an optional add on. They didn’t do it with our new boiler as an example. Sludge in the system isn’t going to be impacting your gas inlet flow. That is related to the gas feed and if the pressure has changed since installation that’s worrying. See what they say when then come round. Floors taking up will depend on what the issue is
and where your piping runs. Nobody here can tell you that.