Graco 164249 Housing Piston

The Graco 164249 Housing Piston (aka Piston Body) guides the piston in the pump to maintain pressure and smooth spraying. Confirm by matching 164249 in your sprayer’s parts manual.

Part No.: 164249
Role: Supports piston motion & helps seal pump pressure
Type: OEM Graco pump/fluid-section component
Fitment: For compatible pro airless units & pump revisions (verify in manual)
Replace If: Low pressure, hard priming, or uneven spray pattern

Retail Price: $161

You save: $6.44 (4.00%)

Our Price: $154.56

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Description

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 If your pump revision differs, confirm any superseded part numbers before purchase.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.