Pressure washer replacement pumps
SIMPSON replacement pump kits by shaft size, orientation and rating, with the washers each one matches.
Replacement pump kits listed by shaft size and rating. Match your engine's shaft size and orientation first, then a rating close to your washer's original.
| Pump kit | Type | Pressure | Flow | Shaft | Outlet |
|---|---|---|---|---|---|
| SIMPSON 90038 | AAA triplex plunger | 3,800 PSI | 3.5 GPM | 1 in horizontal | Quick connect |
| SIMPSON 90039 | AAA triplex plunger | 4,000 PSI | 3.5 GPM | 1 in | Quick connect |
| SIMPSON 90034 | AAA triplex plunger | 4,400 PSI | 4.0 GPM | 1 in | Quick connect |
| SIMPSON 90036 | AAA triplex plunger | 3,200 PSI | 2.8 GPM | 3/4 in horizontal | M22 |
| SIMPSON 90029 | OEM Technologies axial cam | 3,300 PSI | 2.4 GPM | 3/4 in horizontal | M22 |
| SIMPSON 90052 | AAA AX300 axial cam | 3,500 PSI | 2.5 GPM | 3/4 in horizontal | M22 |
| SIMPSON 90037 | AAA triplex plunger | 3,700 PSI | 2.5 GPM | 3/4 in horizontal | M22 |
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