Maxitrol M511B-3/4 Valve

Maxitrol M511B-3/4 3/4" NPT Modulating Gas Valve for Direct Fired (Negative Pressure) Burners with 1/2 PSI Inlet Pressure Max and both side fitted for low fire adjustment

M511B-3/4 is the direct replacement for M511-3/4 (HAS LOW FIRE ADJUSTMENT ON BOTH SIDES)