I honestly can't say enough good things about the Avast Marine ATO set-up. The level sensor has no moving parts and doesn't need to be clean, it works off a pressurized tube.
Link for the ATO https://www.avastmarine.com/collections/avast-built/products/ato-kit
Link for the 12v switch. https://www.avastmarine.com/collections/avast-built/products/solenoid-valve-12v
The switch looks a little different that what I have but it's the same.
Link for the ATO https://www.avastmarine.com/collections/avast-built/products/ato-kit
Link for the 12v switch. https://www.avastmarine.com/collections/avast-built/products/solenoid-valve-12v
The switch looks a little different that what I have but it's the same.