Description
GROCO 1-1/2" NPS/NPT Thru-Hull Fitting SS | Boat Supply Store
For reliable and versatile plumbing connections in demanding marine environments, this GROCO thru-hull fitting ensures superior performance. Constructed from corrosion-resistant #316 stainless steel, it meets the rigorous standards for longevity on saltwater vessels. The fitting features a unique 1-1/2" NPSM/NPT combination thread, facilitating direct connection to a wide array of marine-grade hoses and fittings, and is UL Listed 647B for verified safety and quality. This makes it an ideal component for bilge pump outlets or raw water intakes on custom builds or refits operating in coastal waters.
Key Features
- Unmatched Versatility with NPSM/NPT combination thread
- Superior Corrosion Resistance from premium #316 Stainless Steel
- Certified Reliability with UL Listing 647B
- Robust Construction for extreme marine conditions
- Standard 1-1/2" Sizing for broad compatibility
- Included Nut simplifies installation
- Engineered for Longevity in harsh saltwater
- Authoritative Marine Standard for plumbing integrity
Specifications
| Product Specifications | |
|---|---|
| Thread Type | NPSM / NPT Combo |
| Material | #316 Stainless Steel |
| Size | 1-1/2" |
| UL Listing | UL Listed 647B |
| Includes | Nut |
Who This Is For
Ideal for boat owners, marine mechanics, and DIYers undertaking plumbing projects on vessels requiring a durable, corrosion-resistant thru-hull fitting with versatile threading options. Ensures a secure and reliable connection for various marine applications.
How It Compares
| Feature | GROCO 1-1/2" NPS/NPT Thru-Hull Fitting SS | Competitor |
|---|---|---|
| Material | #316 Stainless Steel | Bronze, 304 Stainless Steel |
| Thread Type | NPSM / NPT Combo | NPT, NPT |
| Size | 1-1/2" | 1-1/2", 1-1/2" |
| UL Listed | Yes (647B) | No, No |
Common Concerns Answered
Is it difficult to find adapters for the dual thread type?
While the NPSM/NPT combination offers great versatility, specific adapters may be required depending on your existing plumbing. It's essential to confirm the thread specifications of your current components prior to installation.
Why is this fitting more expensive than others?
The GROCO TH-1500-WS utilizes premium #316 stainless steel for superior marine-grade corrosion resistance, and incorporates a specialized NPSM/NPT combo thread. This construction and dual threading capability contribute to a higher initial cost compared to less robust materials or single-thread options.
What if I have trouble finding the exact thread adapters?
For specific adapter needs with the NPSM/NPT combo thread, consulting marine plumbing supply catalogs or directly contacting GROCO technical support can help identify compatible fittings and adapters to ensure a seamless installation.
Frequently Asked Questions
What is the thread type of the GROCO TH-1500-WS thru-hull fitting?
The GROCO TH-1500-WS features a unique NPSM (National Pipe Straight Mechanical) and NPT (National Pipe Taper) combination thread.
What material is the GROCO TH-1500-WS thru-hull fitting made from?
This thru-hull fitting is constructed from premium #316 stainless steel, renowned for its exceptional resistance to saltwater corrosion.
What is the size of the GROCO TH-1500-WS thru-hull fitting?
The GROCO TH-1500-WS is a 1-1/2 inch size fitting.
Is the GROCO TH-1500-WS thru-hull fitting UL listed?
Yes, the GROCO TH-1500-WS is UL Listed under number 647B, indicating compliance with specific safety and performance standards.
What are the NPSM and NPT threads used for on this fitting?
The NPSM thread provides a parallel (straight) connection often used with fittings that have a gasket seal, while the NPT thread is tapered and designed for a self-sealing mechanical joint, offering broad compatibility with various plumbing components.
