GROCO 1.5-Inch Bronze Hose Barb Thru-Hull Fitting

The GROCO HTH-1500 hose-barb thru-hull combines the hull penetration and hose connection in one compact fitting. That direct arrangement reduces the number of adapters needed when a flexible hose will connect immediately inside the hull. It is a straightforward choice for drains and other marine plumbing runs where the hose can approach the fitting without a sharp turn. The threaded body secures through the mounting surface, while the hose end provides a dedicated clamping area for the connected line.

The HTH-1500 uses C83600 bronze and carries a UL 647B listing for marine use. Correct hose sizing remains important so the clamp can secure the line without deforming or overstressing the hose. Its NPS-threaded hull section is paired with the formed hose connection, keeping the assembly simpler than a separate thru-hull and barb adapter. The one-piece layout also removes an extra threaded joint that could otherwise require sealing and later inspection.

• NPS threaded hull section
• One-piece thru-hull and hose-barb connection
• UL 647B listed for marine installation
• Reduces the need for an additional hose adapter

Fit the HTH-1500 through a properly prepared opening and use bedding compatible with the hull and fitting materials. Route the hose with enough slack for service but without a sag or bend that places continuous load on the barb. Use suitable marine hose clamps and inspect the connection after commissioning, particularly if the fitting is near or below the waterline. For other thru-hulls, drains, and hull-side plumbing components, browse Thru-Hulls & Drains.