two float switch for gray water tank

[bkelly]

We have a gray water tank and need to pump water out. We need a two float system to implement the concept of run the pump when full and stop when empty. There is a strong preference to not penetrate the walls of the tank so we need two float switches that are completely submersible. The water is to be pumped about 50 feet through ¾ in inch pipe, but less than 5 foot head. I have been advised that a ½ hp motor is preferred. The duty cycle will be well below 5 percent and each run time is expected to be a minute or less.

We have drawn up a one relay connection and can put that in an external box. I suspect someone sells a two float kit of this nature but cannot find it.

My searches have been in vain. Where can I find float/switches that will suffice for this? The submersible pump seems to be easy enough but am happy to hear any advice on that.

Thank you for your time.

 

[Geofd]

your best bet would be to talk to a pump co...they could give you all that info (zoeller) is one pump little giant I think is another co

 

[bkelly]

your best bet would be to talk to a pump co...they could give you all that info (zoeller) is one pump little giant I think is another co

Good point. Sent email to both.
Thank you for your time.

 

[FishScreener]

The last few effluent pumps I bought came with the float. Typically, small systems use one float, It turns the pump on when it goes high enough, and shuts it off when it drops again. A little more complex, is the addition of a latching or delay relay, which either latches in the pump in the on position for a period f time after the float drops, or delays it for a time after it rises.

Do a search for effluent pump. Most of them come with the float assembly.