Groco Bronze Thru Hull Fitting with Grounding Nut, 1 Inch (TH-1000-W)

The Groco TH-1000-W is a 1 inch bronze thru hull fitting with an integrated grounding nut, designed to provide a secure, corrosion-resistant through-hull connection point below the waterline. Thru hull fittings like the TH-1000-W create the watertight passage where seacocks, strainers, or hose barbs connect to plumbing, cooling, or drain systems that pass through a boat's hull. The built-in grounding nut allows a bonding wire to be attached directly to the fitting, helping protect underwater hardware from galvanic corrosion by tying it into the boat's bonding system.

Bronze construction gives this fitting strong resistance to saltwater corrosion, making it suitable for long-term below-waterline installation. The 1 inch size refers to the fitting's thru hull opening, so it should be matched to hose, seacock, or strainer components rated for the same 1 inch size. As a component sold with its grounding nut included, it is ready to be wired into a bonding system during installation.

Specifications

• Brand: Groco
• Manufacturer Part Number: TH-1000-W
• Size: 1 inch
• Material: Bronze
• Includes Grounding Nut: Yes
• Weight: 0.83125 pounds
• Package Dimensions: 9.5 x 4.63 x 4.8 inches
• UPC: 742985064119
• Category: Thru Hull Fittings and Strainers

Frequently Asked Questions

What size is the Groco TH-1000-W thru hull fitting? The TH-1000-W is a 1 inch thru hull fitting, so it should be paired with hose, seacock, or strainer hardware rated for the same 1 inch size.

Does the TH-1000-W come with a grounding nut? Yes, the Groco TH-1000-W includes a grounding nut built into the fitting, allowing a bonding wire to be attached for corrosion protection.

What material is the Groco TH-1000-W made from? This thru hull fitting is made of bronze, chosen for its resistance to corrosion in saltwater and below-waterline marine environments.

How much does the Groco TH-1000-W weigh? The TH-1000-W weighs 0.83125 pounds.

What are the package dimensions of the TH-1000-W? The Groco TH-1000-W ships in packaging measuring 9.5 x 4.63 x 4.8 inches.

What is a grounding nut used for on a thru hull fitting? A grounding nut on the TH-1000-W provides an attachment point for a bonding wire, tying the underwater fitting into the boat's bonding system to help reduce galvanic corrosion.

Is the Groco TH-1000-W suitable for below-waterline installation? Yes, thru hull fittings such as the TH-1000-W are designed to be installed below the waterline as the through-hull connection point for plumbing or drain systems.

What category of part is the TH-1000-W? The Groco TH-1000-W is listed under thru hull fittings and strainers, the category of hardware that creates watertight hull penetrations for onboard systems.

What is included with the Groco TH-1000-W? The TH-1000-W thru hull fitting is supplied with its grounding nut as a single unit.

Can the TH-1000-W be used with a seacock? The TH-1000-W is a 1 inch thru hull fitting intended to connect to matching 1 inch seacock or strainer hardware at the hull penetration point.