Hydrolevel 550R Low Water Cut-Off 322838-754 while EPDM is standard for

while EPDM is standard for most water and steam applications

Internal Vent Limiting Orifice: Simplifies indoor installations by eliminating the requirement for downstream vent lines in most applications

if the material has become rigid or the interior walls are coated with persistent biological growth

this is a standalone magnetic contactor

Hydrolevel 550R Low Water Cut-Off 322838-754 while EPDM is standard forThe Hydrolevel 550R Low Water Cut Off is a heavy duty 120Vac electronic LWCO engineered specifically for technical compliance in commercial hot water boiler applications. Operating as a probe type safety control, the 550R (Part Number 45 552) provides immediate burner shutdown during critical low water conditions to prevent dry firing and catastrophic heat exchanger failure. This model features a manual reset logic that triggers after a sustained 30