1 Inch Screw Type Drain Plug – Fits Skeeter Boats & Kayaks (Replaces Universal Boat Drain Plug)
1 Inch Screw Type Drain Plug – Fits Skeeter Boats & Kayaks (Replaces Universal Boat Drain Plug) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This 1 Inch Screw Type Drain Plug is a universal marine replacement designed for boats and kayaks with 1-inch diameter drain holes. It features a secure screw-type mechanism with a retaining system that prevents the plug from being lost when open. It is commonly used as a transom drain plug on Skeeter boats, various kayaks, livewells, and coolers.
This part is a direct replacement for multiple universal drain plugs, including Sea-Lect K520021-1, Sea Dog 520021-1, and Hobie 10091000.
- Features a self-retaining transom mount to prevent plug loss.
- Constructed from marine-grade Nylon PA66 plastic for durability in wet environments.
- Includes a rubber O-ring to ensure a watertight seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Sea-Lect | K520021-1 |
| Sea Dog | 520021-1 |
| Hobie | 10091000 |
| Aftermarket | DP1-DP |
| Aftermarket | 50-18781 |
Engine & Model Compatibility
Confirm your application requires a 1-inch drain plug by checking the table below or measuring your existing hardware.
| Application | Notes |
|---|---|
| Skeeter Boats | Transom drain plug |
| Boat Transoms | Universal application for 1" holes |
| Kayaks | Compatible with most kayak models |
| Livewells | For drainage applications |
| Water Tanks | For drainage applications |
| Coolers | For drainage applications |
Technical Specs
- 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
What’s in the Box
- 1 x Screw Type Drain Plug with Rubber O-Ring (Note: Some listings may offer packs of 2)
- 4 x Mounting Screws (Note: Quantity and inclusion may vary by seller)
Installation Notes
- Ensure the mounting surface around the 1-inch drain hole is clean, dry, and flat.
- Position the drain plug flange over the hole and mark the locations for the mounting screws.
- Drill appropriately sized pilot holes for the screws.
- Apply a marine-grade sealant to the back of the flange to ensure a watertight seal.
- Align the flange with the pilot holes and secure it firmly with the screws. Do not overtighten.
- Wipe away any excess sealant and allow it to cure as per the manufacturer's instructions before water exposure.
Troubleshooting & FAQ
Will this drain plug fit my boat?
This is a universal plug designed for a 1-inch diameter hole. It is a confirmed fit for many Skeeter boats and various kayaks, but you must measure your boat's drain hole diameter to ensure compatibility before ordering.
How does the retention system work?
The base is designed to hold the plug even after it's fully unscrewed, preventing it from falling into the water or getting lost in the bilge when draining.
What sealant should I use for installation?
We recommend a high-quality, marine-grade adhesive sealant (such as 3M 5200 or a similar product) suitable for below-the-waterline applications to ensure a durable, waterproof bond.
My drain plug is leaking. What should I check first?
First, ensure the plug is screwed in tightly. If it still leaks, inspect the rubber O-ring for cracks, dirt, or deformities and replace it if necessary. Also, confirm the sealant around the flange is intact.
How often should the O-ring be replaced?
Inspect the O-ring annually for signs of wear, cracking, or compression. Replace it as part of regular maintenance or immediately if you notice any damage to prevent leaks.
When should the entire drain plug assembly be replaced?
Look for cracks in the plastic housing, stripped threads that prevent proper tightening, or damage to the flange. Any visible structural damage warrants a full replacement to prevent potential failure.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window if the item is unused and in its original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.
Payment & Security
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