Perko Garboard Drain Plug, 1/2 in NPT, Cast Bronze, Brass Plug

Overview

The Perko 0714DP1PLB is a garboard drain and drain plug assembly for boats that use a 1/2 inch NPT drain at the transom or another low point in the hull. It uses a cast bronze flange with a brass plug, and the flange outer diameter is 2 inches.

This is the style many boat owners use when they want a threaded drain that can be opened while the boat is on the trailer, lift, or hardstand and closed again before launch. It mounts on the outside surface with three #8 screws, so the footprint and fastening pattern are straightforward to check against an existing drain location during replacement.

Bronze and brass are a sensible combination for wet bilge and transom areas where fittings see regular exposure to water, salt, and vibration. For a replacement job, the key fit points are the 1/2 inch NPT size, the 2 inch flange, and the three-screw outside-mount layout.

Key features

• 1/2 inch NPT pipe size for boats rigged with this common threaded garboard drain size
• Cast bronze flange with a brass plug for service in wet transom and bilge drain areas
• 2 inch outer flange diameter, which helps confirm flange clearance before ordering
• Outside-surface mounting with three #8 screws for a straightforward replacement layout
• Complete drain and plug assembly, so the drain body and plug are matched as one set

Installation and fit

A garboard drain like this is normally installed where the hull can empty fully once the boat is out of the water. On many small powerboats, skiffs, and utility hulls, that means the lower transom area. Before ordering, confirm that your existing opening or threaded drain size is 1/2 inch NPT and that the mounting area gives enough room for a 2 inch flange.

Because this assembly mounts from the outside with three #8 screws, it is worth checking the screw pattern and the landing surface for a clean seal. When replacing an older unit, compare the flange diameter and hole spacing with what is already on the boat so the new assembly beds cleanly and covers the previous footprint.

Use on board

This part is a good match for owners replacing a worn or corroded threaded garboard drain on a trailer boat, skiff, runabout, or workboat that uses a simple screw-in plug. It also suits refit work where bronze hardware is preferred in a drain location that sees regular washdowns, standing water, and seasonal draining.

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