Groco Bronze Thru-Hull Fitting with Ground Nut, 1-1/4 Inch, TH-1250-W

The Groco TH-1250-W is a 1-1/4 inch bronze thru-hull fitting supplied with a matching ground nut, designed to provide a secure, corrosion-resistant through-hull connection point below or above the waterline. Bronze construction gives this fitting long-term resistance to saltwater corrosion, making it suitable for below-waterline plumbing runs such as raw water intake, cooling, drain, and discharge lines where a reliable seal against hull penetration is required. The included ground nut threads onto the fitting from the inside of the hull, allowing it to be drawn up tight against the hull material to create a watertight, mechanically secure installation. As a thru-hull fitting, the TH-1250-W is typically paired with a matching seacock or hose barb adapter on the interior side to complete the plumbing connection, and its 1-1/4 inch size should be matched to the hose or valve diameter used elsewhere in the system. Because it is a hull penetration component, proper bedding compound and regular inspection are recommended as part of routine haul-out maintenance. This fitting is sold as the thru-hull body and ground nut only.

Specifications

• Brand: Groco
• Manufacturer Part Number: TH-1250-W
• Size: 1-1/4 inch
• Material: Bronze
• Included Components: Thru-hull fitting and ground nut
• Item Dimensions: 12 x 6.25 x 6.5 inches
• Weight: 1.19375 pounds
• UPC: 742985064126

Frequently Asked Questions

What size is the Groco TH-1250-W thru-hull fitting? The Groco TH-1250-W is a 1-1/4 inch thru-hull fitting, sized to match 1-1/4 inch hose or valve connections.

What material is this thru-hull fitting made of? Bronze construction is used on the TH-1250-W, chosen for its resistance to corrosion in saltwater marine plumbing applications.

Does the TH-1250-W come with a ground nut? Yes, the ground nut is included with the Groco TH-1250-W and threads onto the fitting from inside the hull to draw it tight and create a secure seal.

Is the ground nut sold separately or included? The ground nut ships together with the thru-hull body as part of the Groco TH-1250-W, so no separate purchase is needed for that component.

What are the overall dimensions of this fitting? Item dimensions for the Groco TH-1250-W are 12 x 6.25 x 6.5 inches as packaged.

How much does the TH-1250-W weigh? This thru-hull fitting weighs 1.19375 pounds.

Can this thru-hull fitting be used below the waterline? Bronze thru-hull fittings like the TH-1250-W are designed for through-hull plumbing connections, including below-waterline installations such as raw water intake or discharge lines.

Does the TH-1250-W include a seacock or valve? No, the Groco TH-1250-W is the thru-hull fitting and ground nut only; a seacock or valve is a separate component that connects to the interior side of the fitting.

What is the UPC for this Groco fitting? The UPC for the Groco TH-1250-W bronze thru-hull fitting is 742985064126.

Why choose bronze over other thru-hull materials? Bronze resists the corrosive effects of saltwater exposure better than many other metals, which is why the TH-1250-W is manufactured from bronze for below-waterline durability.