Direct Replacement: Designed for rapid field installation to minimize downtime on residential high-efficiency HVAC systems

providing superior signal strength compared to standard 18-22 mV alternatives

making it a reliable drop-in replacement for maintenance and repair

Always verify the mounting bracket profile before installation

Watts 0066606 Expansion Tank Els PW 17895 Direct Replacement: Designed for rapidThe Watts 0066606 (Model ETX 30) is a high performance hydronic expansion tank designed specifically for closed loop heating and cooling systems. As a veteran grade direct replacement for 0067411 and the legacy ETX 30 series, this 4. 5 gallon unit effectively manages thermal expansion by absorbing excess water volume to protect the boiler and system piping. Built with a rugged carbon steel shell and an epoxy finish, it features a heavy duty butyl