Coates Heater Electric Pool/Spa Heater Replacement Parts 23000105 Flow Switch 1/2 inch - Q-12DS (P07G000 & up PHS) / (P07H000 & up CE) CPH PHS CE ST

The Coates Heater Replacement Part 23000105 (Flow Switch, 1/2 inch – Q-12DS) is a critical safety and control device designed for Coates electric pool and spa heaters.

This flow switch ensures the heater operates only when proper water circulation is present, protecting heating elements from dry firing and potential damage. Specifically engineered for compatibility with PHS models from serial number P07G000 and up, and CE models from serial number P07H000 and up, it also integrates with CPH and ST series heaters. Its 1/2-inch Q-12DS design provides reliable monitoring of water flow, supporting safe operation, consistent heating performance, and long-term durability in both residential and commercial aquatic environments.