Dayton 1MDA9


Pressure Washer Pump, 2500 PSI

1MDA9 428410
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ItemPressure Plunger Pump
Flow Capacity (GPM)2
HP Required @ 500 PSI1.1
HP Required @ 1000 PSI2.2
HP Required @ 1500 PSI3.3
HP Required @ 2000 PSI4.4
HP Required @ 2500 PSI5.6
Shaft Dia.3/4"
Inlet Port (In.)3/4GH
Discharge Port (In.)22 mm
Outlet22 mm
Length (In.)7.2
Width (In.)6.8
Height (In.)6
SealCotton Duct, Buna N Chevron and Lip Seal Packing
BearingsPremium Needle and Ball
Max. Fluid Temp. (F)140
Max. Inlet Pressure (PSI)100
Driver TypeGasoline Engine
CrankcasePrecision Die Cast
Discharge Pressure (PSI)2500
Manifold MaterialForged Brass
Pump HeadForged Brass
Application High Pressure Water Applications, Including Car Wash, Pressure Wash, Sewer Jetting and Cooling Misting
Weight 8.750000


Pressure Washer Pump, Plunger, Shaft Dia. (In.) 3/4 Hollow Shaft, Inlet Port (In.) GHA, Outlet 22mm, Seal Cotton Duct, Buna N Chevron and Lip Seal Packing, Premium Needle and Ball Bearings, Max. Fluid Temp. 140 F, Max. Inlet Pressure 100 PSI, Driver Type Gasoline Engine, Precision Die Cast Crankcase, Discharge Pressure 2500 PSI, Manifold Material Forged Brass, Steel Plunger, Splash Lubrication, Aluminum Crankshaft, Forged Brass Pump Head

High-Pressure Triplex Pumps
  • Suitable for high-pressure water applications, including car wash, pressure wash, sewer jetting, and cooling misting. Forged brass manifold has high-grade head bolts for added protection and strength. Feature a precision die-cast crankcase and stainless steel valves, plus oversize bearings and connecting rods for heavy load disbursement. 1MDB2 and 1MDB3 have 316L stainless steel manifold and Viton seals. Direct-Mount, Electric Motor Pumps have standard C-face mounting. Belt-Drive Pump accessories are available: See page 157 for 24mm and 35mm split taper bushings and sheaves. See page 1848 for pressure washer accessories. For new installations a mounting kit rail is available from your local branch or .
  • Max. fluid temp: 140 F Concentric ceramic plungers Continuously lubricated seals

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