Product Overview
Thru-Hull with Nut 1 1/8" Hose

Ensure a rock-solid, leak-free connection for your 1 1/8" hose with the Groco Thru-Hull with Nut. Crafted from robust marine-grade stainless steel, this fitting offers superior corrosion resistance and long-lasting durability, even in harsh saltwater environments. Designed for a seamless fit and easy installation, the Groco thru-hull provides peace of mind knowing your critical boat systems are reliably connected to the sea. Upgrade your plumbing with confidence and enjoy years of trouble-free performance.
Key Features
- **Durable Stainless Steel Construction:** Built with marine-grade 316 stainless steel for exceptional corrosion resistance and a long service life.
- **1" NPS Thread:** Ensures a secure and standardized connection to your hull.
- **1 1/8" Hose ID:** Designed for a precise fit with your 1 1/8" ID hose, preventing leaks and maintaining optimal flow.
- **Includes Nut:** Simplifies installation and provides a watertight seal against your hull.
- **UL Listed 647B:** Meets stringent safety standards for marine plumbing, providing added assurance of quality and reliability.
- **Compact Design:** Minimizes protrusion inside the hull, maximizing space and reducing the risk of snags or damage.
- **Precise Dimensions:** Careful engineering and manufacturing ensure a perfect fit and easy installation (A 2.8 B 0.3 C 2.3 D 1.2 E 1.3).
What's in the Box
- Groco Thru-Hull Fitting
- Nut
Specifications
The Captain's Take
After years of battling corrosion and leaky fittings, I switched to Groco thru-hulls and haven't looked back. The HTH-1125-S is a workhorse. The stainless steel construction is top-notch, it installs easily, and the included nut makes for a truly watertight seal. Trust me, when you're miles offshore, the last thing you want to worry about is a failing thru-hull. Invest in Groco for reliability and peace of mind.