Methane (CH4) calibration gas at a specific concentration (usually 50% LEL) is required to zero and span the E3SRMM catalytic bead sensor during routine inspections

High Discharge Capacity: Rated at 2

This internal rebuild kit is essential for preventative maintenance schedules in commercial refrigeration systems

0 Cv flow factor

Broad Compatibility: Fully compatible with Johnson Controls System 450

McDonnell & Miller 101A Water Feeder R-410A Methane (CH4) calibration gas atFor service professionals managing residential or light commercial low pressure steam systems, the McDonnell & Miller 101A (Part Number 169400) remains a staple for automated level control. This 120Vac electric water feeder is specifically engineered for cold water feed applications, eliminating the need for manual monitoring and adding water to the boiler. Designed with a heavy duty solenoid, this unit handles a 150 PSI maximum water supply pressure