Compatibility – Quick List
The Graco 164249 Housing Piston (also known as Piston Body) is used in the pump section of professional airless sprayers. Confirm against your model’s parts manual.
- Graco Ultra Max II 1095
- Graco Ultra Max II 1595
- Graco Mark V HD (3-in-1)
- Graco Mark X HD (3-in-1)
- Graco GMAX II 3900
- Graco GH 230
- Graco GH 300
Overview & Key Details
The Graco 164249 is a precision-machined Housing Piston that supports the reciprocating piston motion inside the pump assembly, helping generate and maintain spraying pressure while reducing wear in the fluid section.
| Technical Snapshot |
| Part Number | 164249 |
| Part Name | Housing Piston / Piston Body |
| Category | Pump & Fluid Section Components |
| Function | Guides the piston’s back-and-forth motion and helps seal/maintain pump pressure. |
| Typical Application | Professional airless sprayers (large frame units). |
Why choose the genuine part?
- OEM geometry for correct piston alignment and long service life.
- Consistent fit in compatible Graco pump assemblies.
- Helps restore prime/pressure performance after pump wear.
Fit & verification tips
- Match by part number 164249 in your sprayer’s exploded diagram.
- Inspect related wear parts (seals, packings, balls, seats) during replacement.
- If your unit has a different pump revision, verify supersessions before ordering.
Frequently Asked Questions
Check your model’s parts manual or the pump assembly diagram. Look for the exact 164249 listing in the fluid section/bottom end. If your pump revision differs, confirm any superseded part numbers before purchase.
Loss of pressure, inconsistent spray pattern, difficulty priming, or abnormal pump noise can indicate piston/housing wear. Inspect related packings, seals, and balls as a set for best results.
Clean mating surfaces, lubricate per the manual, and torque fasteners to spec. Bleed air and test at low pressure first. Always follow the official Graco procedure for your exact pump model.
