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Andrew Smith
Andrew Smith, Plumber
Category: Plumbing
Satisfied Customers: 3757
Experience:  City and Guilds qualified plumber
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Has anyone heard of testing a sealed system using high pressure

Customer Question

Has anyone heard of testing a sealed system using high pressure (8bar) as a method of sealing push fit polyplumb connectors that may not have been initially installed properly and were leaking. We have recently had a massive underground leak in a new build that initially showed slow pressure loss during testing at 1.5bar but then was tested a 8bar and miraculously the leak and pressure drop seemed to have disappeared thereafter. The damage was massive and although drying out now, the insurance company wont pay out because current leak detection shows no pipe leak. Any advice would be greatly appreciated. Regards jhk
Submitted: 4 years ago.
Category: Plumbing
Expert:  Andrew Smith replied 4 years ago.

Plumbers_Mate : Yes, the pressure can make the fittings grip tighter as they are forced apart.
Plumbers_Mate : new pipework should be pressure tested up to 10 bar anyway
Customer :

So you believe it is possible that a fairly serious leak or even several leaks at push fit joints could have been sealed by pressurising the system to 8bar.

Plumbers_Mate : Yes, I have had it before with a joint that was not socketed correctly, the pressure straightened it against the o ring