Graco 104813 Plug, Pipe – Steel 3/8″‑M Seal Plug
Compatible Machines
- Graco mobile and stationary spray rigs with unused fluid ports
- Graco proportioner and fluid transfer modules requiring sealed pipe openings
- Graco pump assemblies and manifolds where 3/8″‑M steel pipe plugs are specified
- Graco service kits and maintenance panels needing standard OEM pipe plug replacements
Product Description
The Graco 104813 Plug, Pipe – Steel 3/8″‑M is a reliable, heavy‑duty steel pipe plug designed for sealing unused or service ports in Graco fluid‑handling systems. Its 3/8″‑M thread specification makes it ideal for closing off pipe or manifold openings while maintaining the integrity and system cleanliness of high‑performance spray and pump equipment.
Key Features
- Steel material construction offers robust durability in demanding industrial environments.
- 3/8″‑M thread size ensures a snug, standard fit for associated ports in Graco systems.
- Head‑style plug that can sit flush or slightly recessed, maintaining safe clearance.
- OEM specified part for compatibility with Graco equipment and service routines.
- Provides reliable port sealing — protecting against leaks, contaminants and maintaining pressure integrity.
Technical Specifications
| Specification |
Details |
| Part Number |
104813 |
| Component Type |
Steel Pipe Plug |
| Thread Size |
3/8″‑M (male) standard pipe thread |
| Material |
Steel (industrial grade) |
| Usage |
Seals unused or service ports in fluid‑handling equipment |
Applications
This plug is ideal for closing off unused pipe ports, access openings or maintenance points in Graco spray rigs, fluid transfer systems and pump cabinets. By sealing these ports properly with the 104813 plug, system pressure integrity and cleanliness are maintained, reducing potential downtime and contamination risks.
Performance Advantages
- Prevents fluid or air leakage from unused ports, supporting safe and efficient system operation.
- Maintains system cleanliness by sealing openings that could introduce contaminants.
- Simple installation facilitates fast maintenance and reduces service time.
- Durable steel construction holds up under vibration, pressure, and industrial use.
- OEM compatibility ensures correct fitment and helps preserve the integrity of Graco equipment.
Maintenance Tips
During inspection or service, verify the port threads are clean and undamaged, apply suitable thread sealant if required, then screw in the 104813 pipe plug until it is snug and seated. Avoid over‑torquing to prevent thread damage or port distortion. Replace the plug if you notice leakage, thread damage or corrosion to maintain system reliability.
Frequently Asked Questions
It refers to the standard 3/8″ male pipe thread size used for the plug, matching ports in equipment that require that specification.
While the thread size is standard, the plug is specified as a genuine OEM Graco part — using it in other systems may be possible if dimensions match, but OEM parts ensure proper fit and performance.
Replace the plug if you detect leakage, corrosion, thread damage, or if the port has been modified and the plug no longer seats correctly.
Use a compatible thread‑sealant or tape as specified in your equipment’s manual to ensure leak‑free installation, especially in high‑pressure applications.
