Review on ⛵ Rule 40A Rule-A-Matic Plus Moisture Tight Seals Bilge Pump Float Switch, Small, White, 12/24/32 Volt by Kevin Henry

I bought this hoping it would use the same holes as the control switch I replaced. Same concept but the old one was a mercury switch. I think they should have made it more for the mercury free design. That's why I gave it a 4 instead of a 5. I also wish there was some way of knowing they aren't working before you see your boat sitting lower in the water. I assume some kind of alarm would go off.