Groco TH1000WS 1" Stainless Steel Thru-Hull Fitting

The Groco TH1000WS is a premium 1-inch thru-hull fitting constructed from marine-grade #316 stainless steel for superior corrosion resistance in harsh saltwater environments. This UL Listed (647B) fitting is engineered to provide a reliable, leak-free connection for through-hull applications on boats and marine vessels.

Key Features:

• Marine-grade #316 stainless steel construction resists corrosion and provides long-lasting durability
• NPSM/NPT combination thread design offers versatile installation compatibility with standard plumbing connections
• 1-inch nominal size for medium-flow applications such as livewell systems, washdowns, and bilge pump intakes
• UL Listed 647B certified for marine use, meeting stringent safety and performance standards
• Precision-machined threads ensure secure, watertight seal

Ideal for below-waterline installations where reliability and corrosion resistance are critical. The dual-thread design simplifies installation by accommodating both NPSM and NPT threaded fittings without adapters.