1 Inch Screw Type Drain Plug – Fits Skeeter Boats and Kayaks
This universal marine drain plug is designed for a 1-inch diameter drain hole and is compatible with a wide range of watercraft, including Skeeter boats, kayaks, livewells, and coolers. It features a reliable screw-in design with an O-ring for a watertight seal and a self-retaining flange to prevent the plug from being lost when opened.
This part is a direct replacement for the following part numbers: Universal Boat Drain Plug, Sea-Lect K520021-1, Sea Dog 520021-1, and Hobie 10091000.
- Features a convenient retention system to prevent plug loss.
- Made from durable, marine-grade Nylon PA66 plastic to resist corrosion.
- Installs easily on boat transoms, hulls, or cooler drains.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across different brands.
Brand |
Part Number |
Universal |
Boat Drain Plug |
Sea-Lect |
K520021-1 |
Sea Dog |
520021-1 |
Hobie |
10091000 |
Aftermarket |
DP1-DP, 50-18781 |
Compatible Applications
Confirm your application and drain hole size in the table below.
Application |
Notes |
Skeeter Boats |
Transom drain plug |
Boat Transoms |
Universal application |
Kayaks |
Compatible with most kayak models |
Livewells |
For drainage applications |
Water Tanks |
For drainage applications |
Coolers |
For drainage applications |
Technical Specifications
Specification |
Value |
Product Type |
Screw Type Drain Plug |
Installation |
Self-Retaining Transom Mount |
Connection |
1 inch (25.4 mm) diameter hole |
Housing Material |
Marine Grade Nylon PA66 Plastic |
Housing Color |
Black |
Dimensions |
Length: 5.7 cm (2.2 inches), Outside Diameter: 2.6 cm (1 inch), Base Plate: 5.6 x 3.1 x 1.4 cm (2.2 x 1.2 x 0.6 inches) |
Fitting Type |
Screw-in with O-Ring Seal |
Thread Size |
Coarse thread (exact thread pitch not specified) |
Warranty |
1 Year |
Other Technical Attributes |
Retention system to prevent plug loss when removed |
Package Contents
- 1 x Screw Type Drain Plug with Rubber O-Ring (Note: Some sellers may offer pairs)
- 4 x Mounting Screws (Note: Included hardware may vary by seller)
Installation Guide
- Ensure the mounting surface around the 1-inch drain hole is clean, dry, and free of debris.
- Apply a marine-grade sealant to the back of the drain plug's base plate for a secure, waterproof fit.
- Position the base plate over the hole, aligning the screw holes with your desired mounting points.
- Secure the base plate to the transom or hull using the four provided mounting screws. Do not overtighten.
- Screw the plug into the base and tighten by hand until snug. The O-ring will create the final seal.
Troubleshooting & FAQ
Q: How do I know if this drain plug will fit my boat or kayak?
A: This plug is designed for a standard 1-inch (25.4 mm) diameter drain hole. Please measure your existing hole to confirm compatibility. It's a common replacement for Skeeter boats, many kayak models, livewells, and coolers.
Q: My drain plug is leaking. What should I do?
A: First, ensure the plug is screwed in tightly to engage the rubber O-ring seal. Check that the O-ring is seated correctly and is free of cracks or damage. Also, inspect the mounting surface and base flange for any debris or irregularities that could prevent a proper seal.
Q: How does the retention system work?
A: The base plate has a retaining flange that prevents the screw-in plug from being completely removed and lost when it's loosened to drain water. It will hang from the base until you are ready to secure it again.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
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Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
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Fast Global Shipping: Free delivery worldwide in 5–15 days.
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Direct from Manufacturer: Competitive pricing without compromising quality.