David Graham

05/06/2026

In response to all the comments on my recent post about the two boilers and undersized gas line. this is what an undersized gas line can result in so it is vital that it is done properly!!!

04/06/2026

I was at an interesting one today. For context, I was at a property to service two boilers, a 30KW and a 29KW.

I went straight to the meter and noticed they had the outlet in 22mm, to supply 59KW 🤦‍♂️ if both boilers were very close to the meter you’d maybe get away with it.

For engineers out there the photographs are as follows;

1st OP at meter

2nd OP at farther away boiler

3rd OP at farther away boiler with second boiler in operation

Needless to say a call to gas safe was needed as I was panicking I would have to shut them down until gas line had been upgraded. Now, according to gas safe;

The line as it stands, as long as FGA and gas rate at each boiler is ok, is classed as NCS. I thought AR at minimum but I was wrong! Enables me to make the customer aware and book in to come back and upgrade the gas line.

No matter how long you have been in this game there is always more to learn! Thought I’d share this incase any other engineer runs into a similar circumstance.

This is why I always go on about doing gas line calculations properly, it really burns my custard when I see this kind of thing 🤦‍♂️

02/06/2026

One of those afternoons, silly wee complications in this line of work do happen. In hindsight I’d imagine the boiler was fitted first as it was not possible to access FGA/flue integrity test points without some butchery to the top panel above 🤦‍♂️

03/05/2026

Definitely my funniest birthday present 😂

16/04/2026

Em….. is that an order or a request?! Can’t see that washing anywhere that parking is at a premium but if it does work I know what I want for my birthday

07/04/2026

02/03/2026

Well that’s a lot of nonsense 😢

To be fair the result is in “no mans land” but i suppose a strip down it is

06/02/2026

I think there might be a wee escape of fumes there 🤦‍♂️

06/02/2026

Nearly 8 years my old Rothenberger torch lasted, feels like a milestone having to get a new one 😢

Doubt it’ll improve my soldering skills any but here’s hoping!

Sorry but I’m not ready to get on the press parade just yet. I know they have their uses and sometimes easier than soldering but nobody in the industry is going to tell me that a press fitting is more reliable than one that has been soldered. This is just my opinion but with press tools at the end of the day you are relying on an o-ring.

Curious what other people’s thoughts on this?

05/02/2026

Time to get rid of these nuisance manifolds and get it piped properly! Don’t get me wrong, these were spot on back in the day but the flow through them isn’t great and they do tend to get blocked.

Ok let’s get involved!