Scupper Drains

Scupper Drains
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Scupper Drains

Boat scuppers facilitate the drainage of water from a boat's deck. They are typically located along the edges or corners of the deck, where they help to maintain a dry and safe environment on board.

Scupper Shapes and Sizes

Scuppers can be round or rectangular to accommodate different boat designs and drainage requirements. The choice of scupper size depends on factors such as the mounting location and the volume of water it needs to drain. Common variations include floor scuppers, which are flush with the deck, and other designs that incorporate a ball valve or flap that allow water to exit out and not backflow in.

Scupper Materials

West Marine offers scupper drains in a variety of materials, including stainless steel, bronze, nylon and high-impact plastic.

Types of Scuppers

Direct Overboard Drainage: In this setup, scuppers enable water to drain directly over the side of the boat. Examples include openings in the toe rail of a sailboat, or in the gunwale that surrounds a boat’s cockpit.

Plumbed to an Above-the-Waterline Thru-Hull Fitting: Cockpit drains are often plumbed to a hose that leads to an above-the-waterline thru-hull fitting installed in the transom or side of the boat.

Recommended Scupper Size

The size of scupper drains varies based on the specific boat requirements. The ABYC (American Boat and Yacht Council) recommends that scupper drains be large enough to drain the water out of the area they serve in less than 90 seconds. So, for example, if you have a sailboat that takes a wave over the stern that fills your cockpit with water, that water must drain out of your cockpit in 90 seconds or less.

Keep Your Scuppers Free of Debris!

For boats berthed in marinas surrounded by trees, one common issue is the potential for leaves and debris to block scupper drains. In locations subject to heavy rain, more than one boat has been sunk at the dock because a blocked scupper drain caused their cockpit to fill with water that overflowed the companionway, filling the boat. Regular maintenance is essential to ensure scuppers remain clear and functional, preventing water-related complications on board.

Brands of Scuppers

West Marine offers many different brands of scupper drains. Examples include Marine East, Perko and T-H Marine.

Scupper Drains FAQ

A scupper drain is designed to allow water that enters the boat to drain out, preventing the deck from flooding. They are typically found on the sides or transom of the boat and allow excess water from waves or rain to escape, keeping the deck dry and safe for passengers. Properly functioning scupper drains are essential for maintaining the buoyancy and stability of your boat.

Signs that your scupper drains may need replacement include water pooling on the deck, slow drainage, or visible cracks or leaks around the drain fittings. If the scupper drain is clogged or damaged, it can cause water to accumulate on your boat, leading to potential safety hazards. Regular inspection can help identify issues early and prevent further damage.

Scupper drains are not universal and should be selected based on your boat's make and model. You need to choose a scupper drain that matches the diameter of the holes on your boat and is compatible with the deck layout. Always refer to the boat manufacturer’s specifications or consult with a marine professional to ensure you select the correct scupper drain for your boat.

Yes, installing scupper drains is generally a simple task that can be done by those with basic boating maintenance knowledge. You’ll need to remove the old drain, clean the area, and install the new one with the appropriate sealant to ensure no water leaks. If you're unsure about the installation process, it's advisable to consult a professional to ensure a secure and leak-free installation.

To maintain your scupper drains, regularly inspect them for blockages, cracks, or corrosion. Clean the drains and their fittings to ensure they are free from debris such as leaves, seaweed, or sand. Periodically check for any signs of leakage and ensure that the seals are intact. Keeping the drains clear will help prevent water accumulation and keep your boat's deck dry and safe.

Scupper drains can be used in most types of boats, including recreational, fishing, and pontoon boats. However, the size and design of the drain may vary depending on the boat's design and deck configuration. It's important to select a scupper drain that is compatible with your specific boat type to ensure proper drainage and fit.
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