overflow

[CHOMPERS]

There is a problem with running two pumps on a system. If one pump dies, slows down, or cloggs (etc.) then the sump or tank will overflow. I have been beating around the idea of float switches to shut down the pumps in the event of an overflow or underflow (draining). I haven't fully thought it through but a float switch in the sump could shut down both pumps. Float switches are considered 'normally open' or 'normally closed' meaning that when they hang from the cord, the switch will be open or closed. The switch will be opposite when floating. If a wet/dry or sump (would require freeboard) were filled over a preset level, a normally closed switch would open the circuit and shut off the pumps. You would need to make sure that both plumbing lines have syphon breaks so that the flow does not continue after the pumps are shut down.

 

[zennzzo]

There is a problem with running two pumps on a system. If one pump dies, slows down, or cloggs (etc.) then the sump or tank will overflow. I have been beating around the idea of float switches to shut down the pumps in the event of an overflow or underflow (draining). I haven't fully thought it through but a float switch in the sump could shut down both pumps. Float switches are considered 'normally open' or 'normally closed' meaning that when they hang from the cord, the switch will be open or closed. The switch will be opposite when floating. If a wet/dry or sump (would require freeboard) were filled over a preset level, a normally closed switch would open the circuit and shut off the pumps. You would need to make sure that both plumbing lines have syphon breaks so that the flow does not continue after the pumps are shut down.

That's alot more gear and more places to have trouble. Looks like I need to rethink my system and go back to the gravity return style if I am to get any increase in tank turnover...