None. You can only get what the hydrant will provide. The 4-way valve is used to provide the ability to boost the pressure without having to interrupt the water flow.
I would say 200 GPM or some were in that range. Fully tapped out and pumping you can squeeze just a little more out of the hydrant. Takes a little bit to get it set up but could be worth the time for major fires.
( Static – residual) x100
divided by static = % drop
10% or less– 3 more setups / 4 times the amount of water
11% to 15%– 2 more setups / 3 times the water
16% to 25%– 1 more setup / 2 times the water
more than 25%– less than 1 more setup is avaiable
..
We had close to that setup at the Orlando Fire Conference minus the humat. had the attack pumper flowing 1600 gpm with compound zeroed out ( it started at 60psi before flowing). Opened up the side discharges on the plug and relay pumped everything relay pumper could give. While 1600 gpm was flowing the attack pumper compound returned to 60 psi. So in theory we could have flowed another 1600 gpm or so. BIG WATER!!!! Thanks for that evolution Chief Isakson
None. You can only get what the hydrant will provide. The 4-way valve is used to provide the ability to boost the pressure without having to interrupt the water flow.
I would say 200 GPM or some were in that range. Fully tapped out and pumping you can squeeze just a little more out of the hydrant. Takes a little bit to get it set up but could be worth the time for major fires.
( Static – residual) x100
divided by static = % drop
10% or less– 3 more setups / 4 times the amount of water
11% to 15%– 2 more setups / 3 times the water
16% to 25%– 1 more setup / 2 times the water
more than 25%– less than 1 more setup is avaiable
..
We had close to that setup at the Orlando Fire Conference minus the humat. had the attack pumper flowing 1600 gpm with compound zeroed out ( it started at 60psi before flowing). Opened up the side discharges on the plug and relay pumped everything relay pumper could give. While 1600 gpm was flowing the attack pumper compound returned to 60 psi. So in theory we could have flowed another 1600 gpm or so. BIG WATER!!!! Thanks for that evolution Chief Isakson