Septic system with three floats

Old 03-24-22, 03:46 AM
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Question Septic system with three floats

Say, I'm having a similar issue and question. Please let me know if I should create a new thread. When the ON float comes on, the control panel runs one of the pumps (2 pump 3 float system) and when the level reaches the OFF float, the pump will sometimes turn off normally. Unfortunately, most of the time it short cycles on and off for about 10 seconds very rapidly before finally staying off. I purchased a new float thinking it was the off float but have yet to install it. Based on your comments above, it sounds like this may be the ON float not recognizing it is hanging and keeping the pumps off. The distance between the ON and OFF float was very minimal so I moved the ON float up 2 inches to make sure it has enough time to know it should be OFF, but the same thing is occurring.

I guess I should just replace both floats, but I was curious in what order they communicate with the relay/control panel.

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Last edited by PJmax; 03-24-22 at 08:48 PM.
Old 03-24-22, 08:58 PM
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Welcome to the forums.

Moved you to your own thread.

The top float should be the high level alarm. As long as it's tipped the alarm sounds.

The middle float is the start float. When that is activated it closes the circuit and causes a relay to latch and the pump runs. So moving it around will have no effect on the system.

The bottom float is the stop float and it opens the circuit to the relay and the pump stops. If the pump is chattering that would indicate the start float is trying to re-latch the relay. Since the stop float is open.... the relay won't stay latched.

I'm guessing you have an alternate pump system where it runs 1 then 2 then 1 and 2, etc.

You can put a meter on the float to watch its operation.
Measuring 120v across the float would mean open.
Xergxies voted this post useful.

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