RoyalTank – Automatic Controller for Submersible Pumps No more overflow or motor issues! RoyalTank turns off the pump automatically when your water tank is full. ✅ Works with all submersible pumps ✅ Auto cut-off when tank is full ✅ Protects motor from dry run ✅ Easy to install with 6-month service support ✅ Perfect for homes and apartments Upgrade your water system with RoyalTank — save water and power.