rth
Bronze Member
Applicable codes per build:
IBC - 2015 IFC - 2012
800,000 square foot tire manufacturing plant
350,000 gallon ground tank feeding twin 4,000gmp pumps supplying the system and the hydrant loop separately with a pressure reducer (80psi) on the hydrant side. Incoming water feeding the tank is 10" main that has typically has a static pressure above 80psi and often 100psi.
The incoming feed line to the tank does not bypass the tank/pump or feed the system in any way at all. It just goes to the tank only. I've pointed out the risk of this to FM global and all involved with the tank/valve/pumps being a single point of failure for the entire system (hydrant loop included) with no other way of getting water into the system. FM global wrote me back saying they are restricted by fire codes and do not see a problem with it.
Found 2016 NFPA 20 4.15.4.1 "Where the suction supply is of sufficient pressure to be of material value without the pump, the pump shall be installed with a bypass."
I'm getting push back that this does not apply to a pump/tank system, that this is just for a pump system that is directly fed by muni water.
What do you guys think?
IBC - 2015 IFC - 2012
800,000 square foot tire manufacturing plant
350,000 gallon ground tank feeding twin 4,000gmp pumps supplying the system and the hydrant loop separately with a pressure reducer (80psi) on the hydrant side. Incoming water feeding the tank is 10" main that has typically has a static pressure above 80psi and often 100psi.
The incoming feed line to the tank does not bypass the tank/pump or feed the system in any way at all. It just goes to the tank only. I've pointed out the risk of this to FM global and all involved with the tank/valve/pumps being a single point of failure for the entire system (hydrant loop included) with no other way of getting water into the system. FM global wrote me back saying they are restricted by fire codes and do not see a problem with it.
Found 2016 NFPA 20 4.15.4.1 "Where the suction supply is of sufficient pressure to be of material value without the pump, the pump shall be installed with a bypass."
I'm getting push back that this does not apply to a pump/tank system, that this is just for a pump system that is directly fed by muni water.
What do you guys think?