42" WC (Water Column) set point

the robust construction provides reliable HVAC high limit control

This component is functionally identical to H91WG-1

As a veteran-grade boiler replacement part

Intermatic FM/1QTUZ-120U Timer 30067439-890 42" WC (Water Column) setThe Intermatic FM 1QTUZ 120U is a heavy duty electromechanical timer module engineered for seamless integration into OEM panels, HVACR control circuits, and industrial equipment. This 120V quartz drive timer features a 72 hour battery backup (carry over) to maintain synchronous timing accuracy during power interruptions, ensuring your 24 hour or 7 day schedules remain intact. Built with a robust SPDT switch rated for 21 Amps resistive and up to 1 HP