Plastic Drain Plug with Locking Cap – Ø23 mm

This compact drain plug with a Ø23 mm diameter is designed for boats with smaller drain openings and is a typical size for many production small craft. The non-removable cap is attached to the plug’s body, meaning when you unscrew the plug to drain water, the cap stays tethered and cannot fall overboard. When screwed back in, the cap fits snugly thanks to its rubber gasket, preventing any water from seeping in. This gives peace of mind during your voyage – you know the transom drain hole is securely plugged.

Installation involves inserting the plug assembly into the hull opening and fastening it. Usually, this model features a threaded body with a nut on the inside for tightening. Note: The cut-out diameter (around 30 mm) must match the unit; the Ø23 mm refers to the internal drain passage. The included gaskets ensure a watertight interface with the hull once installed.

Recommended use: This plug is an excellent choice for small boats up to about 5 m, including dinghies, inflatables with transom boards, small fiberglass boats, and even jet skis. For example, if you have an inflatable boat with a wooden transom or a small skiff that accumulates rainwater, this product lets you easily drain water after use. The Ø23 mm size is standard for many factory transom plugs, which also makes it a suitable spare or replacement part.

In operation, simply unscrew the cap (it will hang on its tether), let the water drain out, then screw it back in until the gasket is snug. No tools are required – the entire process is done by hand in seconds. The plastic material withstands heat, cold, and UV rays, so it won’t become brittle or fade easily. Maintenance is minimal – just rinse with fresh water occasionally. With this drain plug in place, your boat is protected from unwanted water accumulation, and you avoid the hassle of misplaced plugs.