Description
GROCO 1" SS Thru-Hull Combo Fitting | Boat Supply Store
This GROCO thru-hull fitting addresses the critical need for reliable hull penetrations in demanding marine environments. Constructed from robust #316 stainless steel, it ensures exceptional resistance to saltwater corrosion. The integral NPSM/NPT combination thread provides versatile connectivity for diverse plumbing systems and meets UL Listed 647B safety standards.
Key Features
- Superior Corrosion Resistance with #316 Stainless Steel construction.
- Versatile Connectivity via NPSM / NPT combination thread.
- Certified Safety with UL Listed 647B rating.
- Durable Installation designed for long-term hull integrity.
- Leak-Free Performance ensured by precise engineering.
- Broad Application Range available in sizes from 1/2" to 3".
- Marine Grade Quality from a trusted manufacturer.
- Secure Sealing for all onboard plumbing needs.
Specifications
| Product Specifications | |
|---|---|
| Thread Type | NPSM / NPT Combination |
| Material | #316 Stainless Steel |
| Size | 1" |
| UL Listing | UL Listed 647B |
| Included | Nut |
Who This Is For
Marine boat owners, builders, and maintenance professionals requiring a durable, corrosion-resistant, and versatile thru-hull fitting for various plumbing applications. This fitting is engineered for longevity and secure hull penetrations on any vessel.
How It Compares
| Feature | GROCO 1" SS Thru-Hull Combo Fitting | Competitor |
|---|---|---|
| Material | #316 Stainless Steel | Bronze, Brass |
| Thread Type | NPSM / NPT Combination | NPSM/NPT Combination, NPSM/NPT Combination |
| Size | 1" | — |
| UL Listed | Yes (647B) | No, No |
Common Concerns Answered
Why is this fitting more expensive than brass or bronze options?
The higher price point reflects the superior durability and long-term corrosion resistance of #316 stainless steel, which offers greater value and reliability in harsh marine environments over time compared to less robust materials.
I'm having trouble finding specific sizes, what should I do?
While availability can fluctuate with demand, check with authorized GROCO dealers or our Boat Supply Store for the most up-to-date stock on all available sizes, ranging from 1/2" to 3".
Is the investment in stainless steel justified over cheaper materials?
Absolutely. The #316 stainless steel construction provides unparalleled resistance to galvanic corrosion and environmental degradation, significantly extending the lifespan of your hull's plumbing and preventing costly future repairs.
Frequently Asked Questions
What is the thread type of the GROCO TH-1000-WS?
The GROCO TH-1000-WS features a combination NPSM (National Pipe Straight Mechanical) and NPT (National Pipe Taper) thread.
What material is the GROCO TH-1000-WS made from?
This thru-hull fitting is constructed from high-grade #316 stainless steel.
What is the size of the GROCO TH-1000-WS thru-hull fitting?
The GROCO TH-1000-WS is a 1-inch thru-hull fitting.
Is the GROCO TH-1000-WS UL listed?
Yes, the GROCO TH-1000-WS is UL Listed under certification 647B.
What are the advantages of a combo NPS/NPT thread?
The combo NPSM/NPT thread allows for direct connection to both straight-thread fittings (NPSM) and tapered fittings (NPT), offering enhanced plumbing flexibility and simplifying system integration.
