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Gas Works

Gas Leak - bad connection, or due to bad work?

Anonymous user 28/02/2024 - 3.29 PM

I had a new combi boiler system installed on 5th April last year. As part of the installation, the gas connection for the property was checked and was found to have a drop of 3.75mbar, which was explained to me as being just about acceptable, as regulations state that a drop of 4mbar is the limit before new pipework would be required. I've come to have the boiler have its first service, and the plumber advised me that the gas leak is now at 7mbar, so I have had my supply cut off until the pipework can be replaced. My main question is - is this a higher than average amount of additional leakage that could occur on its own within this period (an extra 3.25mbar)? Should the replacement pipework have been done at the time of installing the new boiler? Could the leak have gotten worse because of the work that was done (they had to put in new pipes and go underneath my flooring on the first floor to do this)?

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4 Answers

Anonymous user

Bad workmanship and potentially a danger... The gas supply should have been changed when the installation of the boiler was done.. Best thing to do is have a full drop test done again and see what the figures are and go from there, I recommend having a brand new gas feed to the boiler installed and all other as appliances checked. Craig.

Answered21 July 2017

D & R Property and Plumbing Maintenance

Rating: 4.9 out of 5

New Romney

at that reading it would have been prudent to have gas pipework sorted out when new boiler was fitted.gas leaks do not get better with age,it could have just got worse,it could be they made it worse while working on gas pipes,was test done before boiler installation ?,or after installation,they should have done both.

Answered21 July 2017

Smart Heating Control

Rating: 5 out of 5

Wakefield

Dear poster, The permissible tightness test pressure lose of a E6 or U6,G4 gas meter is 4.0mbar with gas appliances attached with no smell of gas. And a 0mbar permissible tightness test pressure lose with no gas appliances attached to the installation. The 4mbar drop is allowed due to the size of the meter, the size of the installation and the appliances attached (eg some gas taps on cooking appliances leak and solenoid valve on boilers pass gas slightly dependant on the age of the appliance.) In my experience most if not all gas safe registered company's would investigate this 3.25mbar drop due to it been so close to the allowance, this would firstly mean turning of the appliances ware possible and retesting, if still dropping in pressure then isolation of the gas pipe work to the appliances would be done, this way it eliminates the appliances from the leak. Once the appliances have been disconnected and isolated from the gas pipe work and there is still a drop. Once no appliance is attached to the pipe work and still a pressure drop, the installation would be redeemed as ID immediately dangerous, and the gas supply from the meter isolated and a warning notice issued for the remedial work to be done. As for the answer to your second part yes, gas leaks can only get worse (eg more leakage into the boiler, more gas valve/tap leakage on the cooking appliance) My recommendation would be to get a gas safe resisted company in to test the tightness of the whole system again and get a full report of the situation. I hope the above helps. Regards Mark Smart heating control. And remember trust the triangle.

Answered24 July 2017

CCH Leeds LTD

No reviews yet

Leeds

Personally i wouldnt want to leave such a drop but it sounds like the first person has done what is required.

Answered7 August 2017