Fire in Tuftonboro

wifi · 11-21-2012, 09:11 PM

When I was working for the FD, we were taught the theoretical max lift was 30 feet. That's from the top of the water surface to the pump. Drilling/chain sawing a hole in the ice helps a lot, but you still can't overcome the 30 foot limit. Obviously the practical is much less, depending on pump conditions and how well the seal is on the hoses/hydrant, etc.

This is on draft, drop a submersible in and the rules change. Relay pumping is to overcome the friction loss of the hose, terrain height differences, etc, etc, etc.

11-21-2012, 09:11 PM	#13
wifi Senior Member Join Date: Jul 2007 Location: Lakes Region Posts: 1,321 Thanks: 282 Thanked 287 Times in 169 Posts	When I was working for the FD, we were taught the theoretical max lift was 30 feet. That's from the top of the water surface to the pump. Drilling/chain sawing a hole in the ice helps a lot, but you still can't overcome the 30 foot limit. Obviously the practical is much less, depending on pump conditions and how well the seal is on the hoses/hydrant, etc. This is on draft, drop a submersible in and the rules change. Relay pumping is to overcome the friction loss of the hose, terrain height differences, etc, etc, etc.