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Graco 166204 Inlet Adapter

The 166204 inlet adapter connects the suction tube/hose to the pump inlet. Verify compatibility in your model’s parts manual before ordering.

  • Part No.: 166204
  • Function: Maintains a sealed fluid path for reliable priming
  • Fitment: Use only if your parts list specifies 166204
  • Benefit: Minimizes air leaks and improves suction performance
  • Install: Clean mating faces; follow the service manual

$200.16
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Product Overview & Fitment Guidance

Compatible Machines

Use the list below to verify fitment before ordering:

  • Any Graco sprayer that lists part number 166204 as the “Adapter, Inlet” in its official parts manual/breakdown.

What This Part Does

Graco 166204 Adapter, Inlet is the fluid-side adapter that connects the suction assembly (pickup tube or hose) to the pump inlet, ensuring a sealed path for coating to enter the pump and maintain prime.

Quick Specs

Part Number 166204
Item Name Adapter, Inlet
Function Joins suction tube/hose to the pump inlet; maintains seal to prevent air leaks and loss of prime.
Typical Location Pump inlet side (fluid section).
Fitment Check Confirm your model’s parts list explicitly calls out 166204 as the inlet adapter.

Key Benefits

  • Restores proper suction and priming when the original inlet adapter is worn or damaged.
  • Reduces risk of air intrusion and material leaks at the inlet connection.
  • OEM geometry for reliable sealing and alignment with mating components.

Fitment & Installation Notes

  • Match the part number in your sprayer’s manual; do not rely on appearance alone.
  • Inspect mating threads and sealing faces; clean and replace worn gaskets/O-rings as required by the manual.
  • Use only the thread sealant (if any) specified by the manufacturer.
  • After installation, prime and check for bubbles or seepage at the inlet connection.

Frequently Asked Questions

Open your model’s parts manual or breakdown and look for the inlet adapter call-out. If it specifies 166204, you have a match. If it lists a different number, use the exact part listed for your model/serial range.

Difficult priming, loss of suction, visible bubbles in the return line, or coating leaking at the inlet connection point. These issues typically indicate wear, damage, or a sealing problem.

Follow the service section of your model’s manual. Some assemblies rely on an O-ring/gasket; others may call for specific thread sealant. Using the wrong method can cause leaks or air draw.

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