the S1-1TVM4K1 provides the reliability required for light commercial and large-scale residential split systems

these mid-efficiency atmospheric boilers rely on the 103661-02 to manage the induced draft fan

the bottom port is typically the bypass port

A functional 6

Reliable Heat Dissipation: The 825 RPM speed ensures optimal static pressure for heat rejection in 1/6 HP applications

Watts 0121585 Regulator 326058-756 the S1-1TVM4K1 provides the reliabilityThe Watts 0121585 is a professional grade 1" LFN240X 6 automatic reseating temperature and pressure relief valve designed specifically for large commercial water heaters and domestic hot water supply tanks. Engineered with a lead free copper silicon alloy body, this valve meets stringent ANSI Z21. 22 and ASME Section IV requirements for high capacity protection. This specific model is factory set for 100 PSI pressure relief and 210F temperature