This model is for 1 1/4" pipes. Water heaters are under constant pressure and rust from the inside out so you don't know there's a problem until it's too late. And when they go, they release a huge amount of water very quickly. The Floodstop auto water shut-off runs on AC power, batteries, or both. There are also a set of normally closed (NC) alarm outputs / contacts that can be connected to an alarm panel, automation system or an auto-dialer if desired! Floodstop FS11/4-NPT -- 1 1/4 inch Water Heater Flood Detector Auto Shutoff Features: - Floodstop valve connects to the water heater 1 1/4 inch supply line
- AC powered or battery powered, or AC powered with battery back-up
- 4 "C" Batteries last for up to 1 year
- Solid brass "full port" non-restricting valve body, DC 6V motor driven ball-valve
- When leak is detected, alarm sounds and water supply is automatically shut off
- Can be connected to alarm or automation system with the on-board alarm output if desired
- Controller mounts on wall, sensor is placed at the base of the water heater
 
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