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Graco 166064 Valve Seat

The Graco 166064 Seat, Valve is a genuine replacement part designed to maintain a tight seal in the pump valve assembly for consistent spray pressure and durability.

  • OEM-quality valve seat for select Graco pump lowers
  • Ensures leak-free performance under high pressure
  • Precision-machined for long service life

Retail Price: $218.5
You save: $13.65 (6.25%)
Our Price: $204.85
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Overview & Key Details

Compatible Machines

This list is based on Graco parts documentation for pump lowers. Always confirm against your sprayer’s parts manual before ordering.

  • Graco Stainless Steel 1000 cc Lower — Model 253596 (Series A)

Genuine Graco 166064 Seat, Valve used in select Graco pump/lower assemblies to provide a precise sealing surface for reliable, leak-free operation.

Part Details

Part Number 166064
Item Name Seat, Valve
Category Pump Lower / Valve Components
Function Provides the sealing surface for the valve element inside the pump lower.
Typical Assembly Stainless Steel 1000 cc Lower (and other verified lowers per manual)
Notes Replace when seating surface is worn, pitted, or leaking under pressure.

Why Choose This Part

  • OEM quality for proper fit and sealing performance
  • Helps restore prime, pressure, and smooth flow
  • Built for high-pressure, professional spraying environments

Installation Tips

  • Clean the valve housing before install; remove debris and old residue.
  • Inspect mating components (ball/plate/poppet) and replace if worn.
  • Tighten to manufacturer specifications and test for leaks/prime.

Frequently Asked Questions

Match the valve seat part number in your sprayer’s parts manual or the pump lower’s exploded diagram. If your manual lists 166064 for the valve seat, this is the correct replacement.

Replace if you notice loss of pressure, hard priming, backflow, visible pitting, or scoring on the seating surface. Always inspect the matching valve element and springs at the same time.

It’s good practice to inspect and replace complementary wear parts in the valve stack (ball/plate/poppet, springs, gaskets, and O-rings) as specified in your pump lower kit to ensure a complete, lasting repair.

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