Are newly installed underground storage tanks intended for fire water suppression storage required to go through a leak testing procedure prior to being put into service?
I take fiberglass?
It says fill with water, let stand, see if level goes down.
Your reply is welcomed and important because we offer fiberglass underground storage tanks (UST) across the USA for fire water suppression storage. So that we can properly advise our customers, the issue around the testing USTs once they are in the ground is a critical detail for us.
One additional question – are there any requirements for the tanks to be put under pressure, up to 5 psi, when they are going the leak detection testing?
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I would say only if the manufacture requires it.
I am thinking not a good idea doing hydro and pneumatic together.
My understanding then, is that filling the tank with water and letting it set full for a minimum of 2 hours is the basic requirement from NFPA 22.
Just to confirm - no added pressurizing of the tank is required?
That is what the good book says.
Yes it is required as per NFPA-22. Tank will hold the water for 2 hours during the hydro test.
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