Drain Plug with Base (Stainless Steel or Brass) – 25 x 50 mm

This drain plug with base combines sturdy metal construction with a universal design suitable for a variety of boats. The 25 x 50 mm size means that when you mount the base (flange) on the hull, it covers a hole about 45–50 mm in diameter, and the plug itself (the inner male screw) is ~25 mm (1 inch) across. This is a common size for garboard drain plugs – often found on yachts and cruisers.

Two material options are available:

• Stainless Steel (Code 00916): Made from marine-grade AISI 316 stainless steel, this version is virtually immune to corrosion, even with constant exposure to saltwater. It retains its shine and structural integrity for years. It’s recommended for boats that stay in the water for extended periods or operate in full saltwater environments.
• Brass (Code 00916-1): Made from solid brass with a nickel/chrome plating, this variant offers excellent strength and corrosion resistance. Brass has been traditionally used in marine hardware for its reliability. The nickel plating adds extra protection and an attractive finish (silver-colored, similar to stainless steel). It’s ideal for freshwater use or for owners looking for a cost-effective yet quality alternative.

Installation & Construction: The plug’s base has a flat circular flange with pre-drilled screw holes – position it on the transom and mark the screw positions. Ensure a rubber gasket (if provided, or use marine-grade sealant) is placed between the flange and the hull. Fasten the screws (use stainless screws for the stainless version, and brass or stainless screws for the brass version) firmly, but do not over-tighten to avoid squeezing out all sealant or damaging the gasket. Once installed, the interior of the base provides a threaded socket for the plug. The plug itself has a wide head – some models have a slot (for a screwdriver/coin), others a folding T-handle or a square for a wrench. Tighten the plug (with its O-ring in place) until it seats firmly. Once you feel the gasket compress, the plug is sealed enough.

Usage & Recommendations:

• Stainless Steel version: Ideal for saltwater yachts, offshore fishing vessels, and any boat where top-tier durability is required. For example, an ~8 m sailboat that stays in the water year-round will benefit from stainless steel’s resistance – you won’t have to worry about a rusted drain plug.
• Brass version: Suitable for motorboats, power cruisers, and fishing boats that operate mainly in freshwater or are pulled out of water after use. It will provide the needed strength and reliability while being slightly more economical. For instance, if you have a 6 m lake boat or runabout, the brass drain plug will perform perfectly for many years.

Both versions operate on the same principle – this is a threaded plug that must be fully unscrewed to drain water. During normal use, keep the plug screwed in and snug; periodically check the seal (O-ring) – if you notice wear or flattening, replace it to ensure 100% watertight performance. When the boat is on land or you want to drain the bilge, unscrew the plug: water will gush out quickly through the wide opening. After draining, clean any sand or debris from the threads and screw the plug back in.

This drain plug with base brings peace of mind and security – its metal construction means it’s unlikely to break or pop out unexpectedly. Whether you opt for the premium stainless steel or the classic brass, you’re getting a reliable product that will keep your boat dry and protected.