Groco HTH Series Stainless Steel Hose Barb Thru-Hull Fitting - Available in 1" to 1-1/8"

The Groco HTH Series thru-hull fitting is a marine-grade stainless steel hose barb fitting designed to pass plumbing hose through the hull below or above the waterline. Machined from corrosion-resistant stainless steel, it stands up to constant saltwater and freshwater exposure while providing a secure, leak-resistant connection point for bilge pumps, washdown systems, livewells, engine cooling, and other onboard plumbing runs. Each fitting is supplied complete with a backing nut for a proper, watertight through-hull installation.

Specifications

• Brand: Groco
• Connector Type: Hose Barb
• Thread Type: NPS
• Material: Stainless Steel
• Exterior Finish: Stainless Steel
• Includes: Backing nut
• Available Sizes: 1 Inch, 1-1/8 Inch

Sizes & Options

The HTH Series is available in two hose barb sizes: 1 Inch (HTH-1000-S) and 1-1/8 Inch (HTH-1125-S). Match the fitting to the inside diameter of the hose you are running through the hull -- an undersized barb will not seal properly under clamp pressure, while an oversized barb will not seat into the hose. Confirm your existing hose diameter or the requirement of the equipment (pump, intake, or drain) being plumbed before ordering, and always pair the fitting with a properly rated hose clamp for the barb size selected.