Graco 16U803 Outlet Housing

Graco 16U803 Outlet Housing – Replacement Pump Lower Component

The 16U803 Outlet Housing is an OEM outlet body used in specific Graco pump-lower assemblies. It directs fluid from the pump chamber toward the outlet port and houses key sealing and valve components essential for maintaining proper pressure and flow.

Compatible Machines

• Graco GH™ Series Big Rig Sprayers (including models such as GH1017, GH2570, GH5040, GH733, GH933)
• Pump lowers where the 16U803 is listed as the factory-specified outlet housing

Key Functions

• Forms the main fluid-outlet path within the pump lower assembly
• Holds outlet valve seats and supports sealing components
• Ensures stable flow and pressure during pump operation
• Connects with the displacement rod, cylinder, and other fluid-section parts

Before You Order

• Verify that your pump-lower assembly lists 16U803 as the correct outlet housing
• Confirm the pump serial/ID plate for matching component numbers
• Inspect related parts such as valve balls, seats, O-rings, and packings for replacement
• Using mismatched housings may cause leakage or performance loss

Technical Details

Frequently Asked Questions