drop in gas pressure

[blueskythinking]

Hello - wonder if anyone could help please. We recently had a new boiler fitted and after test the gas system, the engineer found there was a 2 percent drop in pressure.

After checking pipe work he had installed and also other appliances he was unable to find a leak. He said as there was no leak or smell of gas, this shouldn't be a problem.

But is this true? About five years ago we had a new cooker installed and had the same problem, the people then shout everything down and we had to replace the gas pipes but even then, when tested there was still a 2 percent drop in pressure!!

thanks

 

[Agile]

Leaks are not measured by professionals in percent!

Generally no leaks should be present.

Very small leaks can be tolerated on an appliance if there is no smell of gas but the appliance should have been identified.

Are you sure that he is gas registered? Have you checked him? Has he completed the Benchmark Certificate with the boiler?

Tony

 

[blueskythinking]

thanks. It was hard to read his writing on the certificate he gave us but he did say there was a 2 something drop in pressure and this is what the previous people said who installed the cooker...

I will check him out but this there anything we can do...the gas refit cost us £1,500 five years ago

 

[transam]

I would suggest that your engineer , is refering to a 2 millibar drop in gas pressure , over a 2 minute test . there should be no pressure drop in pip ework , but with appliances connected a drop is allowable providing there is no smell of gas , U6 meter 4 mbars, E6 meter 8 millibars .

Never shoot the messenger cause U dont like the message .

 

[kevplumb]

Leaks are not measured by professionals in percent!

Generally no leaks should be present.

Very small leaks can be tolerated on an appliance if there is no smell of gas but the appliance should have been identified.

Are you sure that he is gas registered? Have you checked him? Has he completed the Benchmark Certificate with the boiler?

Tony

jeez get offa your freakin high horse

 

[namsag]

Nothing to worry about it is perfectly legal and acceptable . It is that small a leak you would have to have your nose right on it to smell it.

 

[kirkgas]

Hello - wonder if anyone could help please. We recently had a new boiler fitted and after test the gas system, the engineer found there was a 2 percent drop in pressure.

After checking pipe work he had installed and also other appliances he was unable to find a leak. He said as there was no leak or smell of gas, this shouldn't be a problem.

But is this true? About five years ago we had a new cooker installed and had the same problem, the people then shout everything down and we had to replace the gas pipes but even then, when tested there was still a 2 percent drop in pressure!!
not sure if it your explanation or your guys poor work so have a read and try to explain it better to me, "your guy found a drop THEN tested the pipe he fitted and said there was no leak or smell"
firstly: he should have tested first, recorded any allowable drop then retested after he was finished which confirms the leak was there before he started and is no worse now he is finished,
secondly: if there is a drop there is a leak, maybe a small leak but there is a leak,
depending on whether it is your explanation or your guys poor procedures but i'm not overly keen on the whole thing

 

[blueskythinking]

thanks for your reply kirkgas.

what he did first was replace our old boiler and associated pipes and then did the test, which found the drop in pressure.

He then went on to check all his work and the other gas appliances in the house to see if the leak could be found - even lifting up floor boards to check the pipes we had replaced 5 years ago.

after all this he said we must have a very small leak somewhere but as there was no smell and the leak was so small, it was ok

Should I ask for the system to be tested before and after fitting and gas applicances and will this stop fitters will saying we have a leak and shut everything down again!