0.5mb drop on tightness test - Should I be worried?

[EastMidsTiler]

Hi everyone,

Just looking for some advice/reassurance. My boiler had its second annual service today and the (gas safe) engineer recorded a 0.5mb drop on the tightness test. He assured my partner that this was nothing to worry about but as I wasn't home at the time I just wanted reassurance that this is okay? British Gas did the first service and it was nowhere near as comprehensive as carried out today. I suspect this result would have appeared first time around but either the test wasn't carried out or it wasn't recoreded.

As we only have the boiler and hob running on gas is there anyway this "leak" can be located? Isolate the applicances indivually? Sniffer test? Or is this harder to find than a needle in a haystack?

And lastly, is this likely to be increasing our gas bill?

I should say the engineer was in no way worried and has signed off job sheet as safe so I'm probably worrying about nothing.

Thanks,

 

[townfanjon]

Its within tolerance pal , strange you can have a gas leak but its ok .

 

[JTplumbingservices]

Hi everyone,

Just looking for some advice/reassurance. My boiler had its second annual service today and the (gas safe) engineer recorded a 0.5mb drop on the tightness test. He assured my partner that this was nothing to worry about but as I wasn't home at the time I just wanted reassurance that this is okay? British Gas did the first service and it was nowhere near as comprehensive as carried out today. I suspect this result would have appeared first time around but either the test wasn't carried out or it wasn't recoreded.

As we only have the boiler and hob running on gas is there anyway this "leak" can be located? Isolate the applicances indivually? Sniffer test? Or is this harder to find than a needle in a haystack?

And lastly, is this likely to be increasing our gas bill?

I should say the engineer was in no way worried and has signed off job sheet as safe so I'm probably worrying about nothing.

Thanks,

There are permissible drops depending on meter and installation as long as you can’t smell gas.
However if the test was carried out with all appliances isolated and it dropped it’s not allowed.

 

[ShaunCorbs]

Nope it’s fine and depending on how he did the test eg water gauge it’s not even readable/ notable at 0.5 mbar

 

[Sharp Point]

You can get much severe drops than that, from the sun hiding behind the clouds on external pipe runs

 

[EastMidsTiler]

Thanks for the reassurance!

Is it possibe to locate the "leak" if we get someone back to isolate the boiler and gas hob?

 

[JTplumbingservices]

Thanks for the reassurance!

Is it possibe to locate the "leak" if we get someone back to isolate the boiler and gas hob?

Did he do a tightness test before he started ?

 

[Scott_D]

Thanks for the reassurance!

Is it possibe to locate the "leak" if we get someone back to isolate the boiler and gas hob?

It’s a tiny amount and it’s possible it was just a change in temp. You can employ someone to test again and find the leak if you wish

 

[ShaunCorbs]

I wouldn’t tbh tho

 

[quality]

That is only if there is an actual leak which unless the same method was used a number of times it could the temporary connection made to do the test