Garretson Impco KN 039-31173-1


Inlet NPT Outlet NPT Max Inlet
Spring Primer Tamper
039-31173-1 3/4″ 3/8″ 8 oz 4 oz / Red Manual Yes 7/16″

Manual Primer

Tamper Resistant


Fuel Type                                        LPG Vapor or Natural Gas Vapor

Operating Temperature          -40°F to +250°F (-40°C to +121°C)

Mounting Position                     As close to the carburetor as possible with the arrow on the back cover pointing up to minimize the effects of gravity on diaphragm travel. Horizontal position can be used when fuel contamination can be controlled with HD-5 or HD-10 specified LPG fuel.

Diaphragm Material                  Silicone

Applications                                  Stationary

Certification                                  UL (AU1502) – inquire for specific ECE approval

Inlet Pressure

Maximum                                        13.84” Water Column (3.44 kPa)

Nominal Outlet Pressure           -0.12 kPa (-0.5” or below Water Column)

Initial Flow Pressure                    -0.05 to -0.35 Water Column

Horsepower Rating

LPG (standard)                              40 HP (30 kW)

LPG (high flow)                             50 HP (37 kW)

Natural Gas (standard)              25 HP (19 kW)

Natural Gas (high flow)              30 HP (22 kW)

Weight 1.242 lbs