a differently sized OEM valve must be used

The curved sensing surface must maintain direct contact with the copper pipe

What should I check if I am getting a zero-voltage output

verifying the physical mounting footprint is recommended for non-Johnson Controls equipment

Resideo V8043J1037 Valve THPU32HP7Y a differently sized OEM valveThe Resideo V8043J1037 Zone Valve is a heavy duty, 2 way normally open zone valve engineered specifically for controlling the flow of low pressure steam and hot water in hydronic systems. Built with a rugged brass body and a stainless steel stem, this motorized valve is rated for a maximum close off pressure of 20 psi and a static pressure of 125 psi. The 3. 5 Cv flow coefficient ensures efficient delivery through 3 4 inch NPT threaded connections,