If the transformer output is correct but power is not reaching the board

This two-position valve is optimized for low-pressure steam and hot or chilled water

Key Benefits Precise Compatibility: Specifically designed for 1-1/4" – 1-1/2" Watts 009M2 and LF009M2 series backflow assemblies

this 1/2" NPT-compatible glass offers the precision required for accurate steam boiler troubleshooting and long-term HVAC system efficiency

Does this include the drain tube kit

Conbraco 10-604-12 Relief Valve Els PW 17895 If the transformer output isThe Conbraco 10 604 12 is a high capacity ASME Section IV safety relief valve designed specifically for hot water heating boilers and hydronic heating systems. Featuring a 3 4" MNPT inlet and a 3 4" FNPT outlet, this bronze bodied valve is factory set at 60 PSI. With a certified heat dissipation capacity of 1,399,000 BTU hr, it provides reliable overpressure protection for commercial and industrial water heating equipment. The corrosion resistant EPDM