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kevin13952 Member	# Posted: 7 Jul 2025 02:39pm - Edited by: kevin13952 Reply So I'm pumping water from a creek. I have a submersible pump in the creek. That pump has it's own automatic switch and will turn off when the water is low, and turn on when the water gets 1.5 inches deep. I pump from the creek to a 1500 gallon cicstern tank. I want to be able to put a float switch into the cistern tank which will turn off power to the creek pump, when the cistern tank is full. Then provide power to the creek pump when the cistern water level drops. The problem I'm finding is float valves seem to all be designed to turn ON when water is low, and turn OFF when water is high. That's REVERSE of what I need. Can someone please tell me where to find a float switch that turns OFF when in the raised position and ON when in the lowered position? Thank you in advance for any assistance!

gcrank1 Member	# Posted: 7 Jul 2025 03:36pm Reply Not to that question, but another....How to you envision running the wiring from the tank float switch to the pump?

Brettny Member	# Posted: 7 Jul 2025 03:39pm Reply You dont need a float switch per say. A float valve and a pressure switch on the pump would work with existing wireing prob.

MtnDon Member	# Posted: 7 Jul 2025 08:43pm Reply Search for a Pump Up Float Switch, also known as a 'Normally Closed" pump switch. They allow a tank to be filled and shut off the pump when full.

travellerw Member	# Posted: 7 Jul 2025 10:07pm Reply If you are using a switch in this way, it would be submerged pretty much %100 of the time. I'm not sure that is the best solution as I highly doubt you could find one that is sealed well enough to last. What you are trying to do is sorta common with people who have cisterns and water delivery. However, they usually power an alarm when the tank gets low. I have seen a device like this used. https://www.amazon.ca/Motoforti-Universal-Sending-Sender-Stainless/dp/B0CT5C4HDS?crid =ORUXPVE30VD7&dib=eyJ2IjoiMSJ9.ekx02suArDH2AAogU5R0_nGaV0CzWXzlzd8kkfvN3VkhSN8KCwVyBP ELkBJgnJx6bER9VBUTT-cU5vro5oMN-6iWfLv4sHMwnMpl9Dd8kY1r-49TFG-dtv8xfdlNh3hSNJGkYPNWeN0 L9xRzz3IR-Y6CBpxo1L_mchK3sT7iuHt8nuLBblTQGAmr4XfZwhGKXCt53nbP9v_B-r1fi08UPuhb9jAfqKb6 Cb9W-mGbvtm7o-GcSOJ9wFdGOAcrTu9du2PifpJY88XjrJOf54LAPDEU-Kcji-Q_jL7HEZLSvAU.THunvOY7Q Hfi_t6n_JsSFU3BuvkTileJRclqO3gFMJ4&dib_tag=smacab-20&keywords=Sensor%2BStainless%2BSteel%2BS ending%2BUnit&qid=1751940276&sprefix=sensor%2Bstainless%2Bsteel%2Bsending%2Bunit%2Cap s%2C147&sr=8-26&th=1 Its unusually hooked up to a control board that sounds the alarm at a certain level. It could be easily modified to switch a relay instead (that could power the pump). It could also easily integrate into an arduino for a DIY solution if you have those skills.

MtnDon Member	# Posted: 7 Jul 2025 10:40pm - Edited by: MtnDon Reply An explanation of the switch An example of one you can buy