Graco 157350 Hose Fitting 1/4 x 3/8 NPT Connector Nipple
- Type: Precision-engineered nipple reducer fitting designed to connect a 3/8" MNPT to a 1/4" MNPT connection.
- Material: Heavy-duty steel construction ensures durability and leak-free performance under pressure.
- Pressure Rating: Handles up to 6000 PSI, ideal for Graco airless sprayers and high-performance coating systems.
- Application: Used to securely join hoses of different sizes, improving fluid flow and pressure stability.
- Compatibility: Works with multiple Graco, Titan, and Wagner spray systems.
What the Graco 157350 Hose Fitting Is & Where It Fits
Compatible Machines (Examples)
This is a universal 1/4" x 3/8" NPT male-to-male connector used across many airless systems. If your sprayer or hose run uses NPT ports in these sizes, this fitting is suitable.
- Graco Magnum Series (e.g., X7, X9, ProX7, ProX9)
- Graco Nova & Classic (e.g., 390/395/490)
- Graco Ultra & Ultra Max II (e.g., 395/495/595)
- Graco Contractor/FinishPro units with 1/4" or 3/8" NPT hose runs
- Titan airless sprayers using NPT hose manifolds (select models)
- Wagner professional airless units with NPT adapters (select models)
Tip: Always confirm your exact port sizes in the machine manual before ordering.
Overview
Graco 157350 is a durable hose fitting / connector nipple that adapts a 1/4" NPT line to a 3/8" NPT line. Designed for professional airless paint sprayer setups, it’s commonly used to bridge main supply lines to whips or filter blocks, or to integrate accessories that require the alternate NPT size. Its male-to-male profile streamlines tight installs and minimizes leak points when properly sealed.
Specifications
| Part Number | Graco 157350 |
|---|---|
| Type | Nipple / Reducer Fitting (male-to-male) |
| Thread Size (Side A) | 1/4" NPT (male) |
| Thread Size (Side B) | 3/8" NPT (male) |
| Typical Working Pressure | Up to 5,000 psi* |
| Material | Heavy-duty steel (corrosion-resistant finish) |
| Use Case | Connects/steps between 1/4" and 3/8" NPT hose/manifold ports in airless systems |
Always match system pressure ratings; never exceed the lowest rated component.
Fitment & Installation Tips
- Confirm both mating ports are NPT (tapered) threads: 1/4" and 3/8".
- Use appropriate thread sealant or PTFE tape suitable for paints/solvents; avoid over-wrapping.
- Hand start threads to avoid cross-threading; tighten to spec—do not overtighten.
- Pressure-test after install; check for seepage at startup and after first use.
Frequently Asked Questions
Compatibility list is representative; verify port sizes and thread type (NPT) on your specific machine.
