Graco 15G331 Pipe Plug

The **Graco 15G331 Pipe Plug** is a durable OEM component designed to securely seal unused ports in fluid systems, preventing leaks and contamination.

Thread Size: 1/4″ NPT
Material: Heavy-duty metal construction
Use: Seals unused pump or manifold ports
Ensures: Leak-free and pressure-tight system

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Description

Graco 15G331 Pipe Plug

The **Graco 15G331 Pipe Plug** is a high-quality OEM sealing component designed for use in fluid handling and spray systems where secure closure of unused ports is required. Made to withstand demanding conditions, this plug ensures leak-proof performance and system integrity across a range of applications.

Key Features & Specifications

Thread Size	1/4″ NPT male thread for standard pump and manifold ports
Sealing Face Diameter	0.320″ — precision-machined for reliable contact and minimal leakage
Length	Approximately 0.75″ overall
Material & Finish	Durable metal construction (OEM standard) for high pressure and repetitive use
Application	Used to plug unused ports or access points in fluid systems, maintaining pressure and preventing contamination

Why Use This Pipe Plug?

In complex pump, manifold or spray gun systems where multiple ports or service access points exist, the 15G331 plug offers a trusted solution to seal off unused or temporary openings. By choosing the OEM part you ensure exact fit, correct materials and geometry — reducing the risk of leaks, contamination or premature wear. Properly sealed systems maintain efficiency, reduce maintenance and help ensure consistent performance.

Installation & Maintenance Tips

Ensure system pressure is relieved before installing or removing the plug.
Clean all surrounding surfaces and threads to remove old sealant, debris or corrosion.
Apply a thin layer of recommended thread sealant or tape if required by your system specification.
Hand-tighten the plug until the sealing face seats squarely, then apply correct torque — avoid over-tightening to prevent thread damage.
During regular maintenance, check the plug for signs of thread wear, corrosion or leakage; replace immediately if any faults are found.

Frequently Asked Questions

Reuse is possible provided the threads and sealing face show no damage, corrosion or wear. Always inspect before reuse and apply fresh thread sealant to ensure proper sealing.

While the 15G331 is designed for many Graco fluid systems and manifolds, always verify compatibility by cross-checking your equipment’s service manual or parts list to confirm thread size and port dimensions.

Key factors include thread size and type (NPT vs others), sealing face diameter and geometry, material suitability for your fluid and pressure conditions, and ensuring the plug fits flush and seals properly in the port.