Graco 100721 Pipe Plug

The Graco 100721 Pipe Plug is a durable 1/4-18 NPTF socket-head plug used to seal unused air or fluid ports in Graco spray guns and regulator assemblies. Ideal for preventing leaks and maintaining pressure integrity.

Thread Size: 1/4-18 NPTF
Used in Fusion AP spray gun and air regulator manifolds
High-quality steel construction for long service life
OEM replacement part – ensures perfect Graco fit

$18.12

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Description

Product Overview & Key Details

The Graco 100721 Pipe Plug is a 1/4-18 NPTF socket-head plug used to securely seal unused air or fluid ports across Graco spray equipment. It’s commonly installed in gun handles and air regulator manifolds to prevent leaks and maintain system pressure integrity.

Compatible Machines / Equipment

Verified applications where 100721 is utilized.

Graco Fusion AP Spray Gun — bottom handle plug (pipe plug location).
Air Regulator Assemblies (Graco): Models 206849, 203716, 244844.
Mastic/Low-Volume Air Regulators & Kits: Model series 246687, 262549; Air Regulator Kit 902412 (uses 1/4-18 NPTF plug).

Why choose this plug

Correct thread: 1/4-18 NPTF for tight, leak-resistant seal.
Service-friendly: Socket-head design for easy install/removal.
Versatile: Fits guns and regulator manifolds where a 1/4-18 NPTF port must be sealed.

Installation & Use Tips

Confirm port thread is 1/4-18 NPT(F) before installation.
Apply suitable thread sealant where specified by your equipment manual.
Tighten with the correct hex key; avoid over-torque that may damage threads.

Frequently Asked Questions

Yes—100721 is a 1/4-18 NPTF pipe plug specified by Graco for sealing designated ports in guns and regulator assemblies. Always follow your model’s parts manual to ensure it’s the correct plug for the location.

It installs in the bottom of the Fusion AP handle to close an unused threaded port as specified in the gun’s parts diagram.

This plug is broadly used where a 1/4-18 NPTF port needs sealing. Many applications are in air regulator assemblies and Fusion AP guns. Check your sprayer’s specific parts list to confirm the plug location and part number before ordering.

Use the thread sealant specified by your equipment manual (e.g., PTFE tape or approved pipe sealant). Avoid over-application and always clean threads before installation.

Locate your model’s parts manual and search for the plug at the relevant port. If your diagram lists 100721 for that location, it’s the correct part. If not, note the called-out part number (plug size may differ).