Graco 218070 Gun Needle-Diffuser Seat Kit

The Graco 218070 Gun Needle-Diffuser Seat Kit restores proper shut-off and spray performance for select Graco Contractor and FTx series airless spray guns. Perfect for repairing leaks or poor diffusion at the gun tip.

Includes needle, diffuser/seat, gasket, and locknut.
OEM Graco parts ensure durability and leak-free performance.
Fits models like 220955, 235990, 217593, 820165, and others.
Replaces worn components to maintain spray quality and safety.

Retail Price: $155

You save: $43.32 (27.95%)

Our Price: $111.68

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Description

Needle–Diffuser Seat Kit Details (Graco 218070)

The Graco 218070 Gun Needle-Diffuser Seat Kit restores proper sealing and spray performance in select Graco contractor-type airless spray guns by replacing the high-wear needle, diffuser/seat, and related seals.

Compatible Machines / Spray Guns

Fits the following Graco spray guns and assemblies (verify model & series on the gun ID plate):

Contractor / FTx family guns (e.g., FTx, FTx-E, Contractor ST, SG2, SG3)
220955 (Contractor Gun with RAC IV) – Series D
235990 – Series C
217593 – Series E
820165 – Series D
244161 (Contractor In-Line Valve Gun)
244364
244365
238350 (FTX gun with RAC IV) – Series A
824004 – Series A
289385
287030
Also commonly referenced with assemblies: 243285 (FTX with RAC V), 243282 (Contractor with RAC V), 824950 (Contractor with RAC V, SW).

Why Choose the Graco 218070 Kit

OEM components restore shut-off and diffusion for a consistent spray pattern.
Prevents leakage at the tip end by renewing the needle and diffuser/seat as a matched set.
Maintains safety: proper diffuser function reduces high-pressure stream hazards when spraying without a tip.
Designed for popular Contractor/FTx/SG-series Graco guns for quick, reliable service.

Kit Contents & Specs

Kit Number	218070
Includes	Needle (assembly), Diffuser/Seat, Gasket, Locknut
Install Note	Replace needle and diffuser/seat together; mixing old/new parts can cause leaks.
Typical Torque*	Diffuser/seat assembly: ~26–32 ft-lb (35–43 N·m)
Supersedes	Commonly listed as replacing 177222, 107109 (check your model/series).

Installation & Service Tips

Perform a full Pressure Relief Procedure before disassembly.
Remove tip/guard, then the old diffuser/seat and needle components.
Clean mating surfaces; install new gasket and diffuser/seat, then the needle assembly.
Tighten to spec; verify trigger shut-off and no seepage at the tip end.
Test spray into a grounded metal pail; confirm proper diffusion without the tip installed.

Safety Notice: Airless equipment operates at very high pressure. Follow all Graco instructions to prevent injection injury. Use only genuine OEM parts like the Graco 218070 to maintain safety and performance.

Frequently Asked Questions

Yes—this kit is referenced for Contractor/FTx-family guns (including SG2/SG3) and for specific models listed above. Always confirm your gun’s exact model and series (e.g., 220955 Series D) before ordering.

These parts wear together. Using an old needle with a new seat (or vice-versa) can prevent proper sealing and cause leaks at the tip end. The Graco 218070 bundles them as a matched set to restore shut-off and diffusion.

Persistent dripping after releasing the trigger, difficulty achieving a clean fan pattern, or fluid jetting without proper diffusion (especially when the tip is removed) are common signs that the needle and diffuser/seat are worn.

Torque values can vary slightly by gun model/series. Use the typical range provided above as guidance, but always follow your specific Graco manual for final torque specifications and procedures.

Many catalogs list 177222 and 107109 as superseded by 218070. Still confirm against your gun’s parts list and series to ensure a correct match.