Groco Bronze Thru-Hull Fitting NPS Thread

The Groco TH Series bronze thru-hull fitting is a standard-length through-hull with an NPS thread. It gives you a dependable through-hull opening for raw water intakes, discharges, and other below-waterline or deck-drain plumbing on boats. Each fitting comes with its mounting nut.

Key Features:

• NPSM / NPT combination thread works with common marine seacocks, valves, and fittings
• Cast bronze construction (C83600 bronze, with C84400 bronze used in the largest sizes) resists corrosion in marine service
• UL Listed 647B marine thru-hull
• Nut included (the -W suffix means "with nut")
• The series is also offered without a nut (-L), in BSPP threads, and in stainless steel

Installation Notes:

• Cut the threaded portion to the right length for your hull and butt block thickness.
• Allow for thread depth when you pair the fitting with a seacock.
• Use sealant between the hull and the thru-hull flange.
• Not for use in potable water systems.

Groco is a well-known name in marine plumbing. This thru-hull is a long-lasting choice for new boat builds, refits, and replacement work.