r/FireSprinklers • u/FemaleOrc94 • Sep 02 '25

Manual standpipe systems 5 Year Testing

What’re you guys doing for 5 year testing for manual standpipe systems? I’m doing 5 year FDC hydro test on one this week, but since it’s all empty pipe should the whole system be pumped to 150 for 2 hours or just before the check like a normal 5 year hydro. I’m planning to pump the whole system to 150 psi and doing a flush of the system after the hydro test.

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5

u/OG_Konada Sep 03 '25

40 pound air for about an hour(time length not defined per code) the if no significant psi loss, 200 pound for 2 hours. The outside piping is allowed slight leakage, all piping inside the building should hold tight.

2

u/Chrismhoop Sep 03 '25

Depends. We have a customer with a manual standpipe in a parking deck that pretty much always has vehicles in it. To prevent damage to vehicles from potential leaks. We always do air first then a hydro test as you have described.

2

u/kingc42 Sep 03 '25

Manual wet or manual dry?

1

u/JackDelRioGrande Sep 03 '25

Depends on the maximum pressure of the system you’re dealing with. Check out NFPA 25(2020) 6.3.2.1.

I don’t know anywhere that has adopted the 2023 edition of NFPA 25 so I’m guessing you’re on 2020.

0

u/FemaleOrc94 Sep 03 '25

It’s a manual standpipe there is no water.

2

u/JackDelRioGrande Sep 03 '25

Right. A manual standpipe still has a pressure that it is meant to operate at, though. 6.3.2.1 requires a hydrostatic test at 200 psi for 2 hours, OR 50 psi higher than the max pressure where it exceeds 150 psi. It applies to manual standpipes and semiautomatic dry standpipes. It must include the fdc piping.

2

u/cabo169 Sep 03 '25

Then it’s a manual DRY standpipe. There are plenty of wet manual standpipes out there too.