Search results for query: *

Alright thanks, it was just something that has been on my mind lately.

yes, NYC does allow 65 psi. The particular buildings im talking about do not have firepunps. The mention buildings only have gravity tanks. What I have noticed while performing inspections is that I get a base pressure of 75-125 psi ( standpipe base near riser control valve ) at various...

Yes I have performed many times. When the flow test is performed while FDNY inspector is present, they only ensure that the siamese connections are working with flow. During the hydro pressure test system is pumped usually 50psi above static pressure then system pressure is locked.

Thank you everyone for your thoughts I have those certifications, I have read that book multiple times once I noticed this scenario at places I inspect...i suspect the buildings systems are grandfathered in...Im asking because I dont wanna make a stink about it at work and its something...

yes I understand it doesn't get the required pressure, what im saying is I inspect alot of buildings with this going on. A gravity tank feeding a single building or multiple buildings and there is no Firepump.. How would the system get the required pressure or is there something im missing?

Alright, I live in New York City & I have inspected many residential buildings that have gravity tanks and DO NOT HAVE FIREPUMPS. 15fls x 8 ft = 120 Lobby =12 ft basement =12 ft tank above roof = 15ft (17) 16 inch slabs =272 inch / 12in = 22.6 ft =181 ft 181 ft x 0.433psi = 78.373psi water...

500 gpm stand pipe @ 100 psi....250 additional gpm @ same 100psi for every additional standpipe... 4 in pipe minimum... if combination system, 500 gpm @ 100psi...plus above additional if additional stand pipe is needed, then add hydraulic calc for sprinklers.... pipe riser is minimum 6in FOR...