Compatible Machines (Top)
- Any Graco system with 3/4″ NPT pipe ports on the fluid path (verify your thread size/style).
- Graco pressure tanks / pressure pots using 3/4″ NPT manifold or outlet/inlet connections.
- Graco fluid supply lines & hard-pipe runs on finishing systems that require a 3/4″ NPT pipe coupling.
- Graco hose manifolds, tees, and headers configured with 3/4″ NPT female threads.
- General Graco finishing accessories where a 3/4″ NPT coupling joins two pipe-threaded components.
Product Summary
The Graco 100385 Fitting, Coupling, Pipe is a universal 3/4″ NPT pipe-thread coupling used to join two pipe-threaded components in Graco fluid systems. It’s ideal for hard-pipe sections, manifolds, and transitions on finishing and fluid delivery setups where a standard 3/4″ NPT interface is required.
Key Specifications
| OEM Part Number | 100385 |
| Description | Fitting – Coupling – Pipe |
| Thread Size / Standard | 3/4″ NPT (pipe thread) |
| Typical Connection | Joins two 3/4″ NPT pipe-threaded components in the fluid path |
| Application | Finishing systems, pressure tanks/pots, manifolds, hard-pipe runs, headers |
| Package Contents | 1 × Graco 100385 coupling |
Notes
- This is a generic coupling used across many Graco setups that employ 3/4″ NPT ports.
- For model-by-model confirmation, match port size & thread standard in your unit’s parts manual.
Frequently Asked Questions
No. It’s a 3/4″ NPT pipe coupling used wherever your Graco system uses 3/4″ NPT ports. Always verify thread size and standard in your parts manual before purchase.
Check your sprayer’s or accessory’s parts manual/spec sheet for 3/4″ NPT. If unknown, measure the fitting and compare to NPT sizing charts; NPT is tapered and measured by nominal pipe size, not outside diameter.
Yes—use thread sealant or PTFE tape compatible with your coating/solvent. Follow Graco’s guidelines and allow cure time if using liquid sealant.
Only if the connected components are rated for the system’s maximum working pressure and are specified as NPT pipe connections. Never mix thread standards or exceed rated pressure.
This part is NPT only. Using it on BSPP/BSPT/metric ports can cause leaks or damage. Source the exact thread standard or use a rated adapter from the OEM.
