Sea-Dog Thru-Hull Drain Fitting White | 520790-1
Sea-Dog Thru-Hull Drain Fitting White | 520790-1 — Product description
A simple, corrosion-proof thru-hull drain fitting from Sea-Dog. Molded in white polypropylene, it hooks to a hose and carries drainage overboard above the water line. 2-7/8 inch outside diameter, 4-3/16 inches long.
The Sea-Dog thru-hull drain fitting is one of those parts you install once and forget about. It's molded from white polypropylene, so there's nothing to corrode, nothing to seize up, and nothing to stain your topsides after a season in the sun. You mount it through the hull, connect a hose on the inside, and let it carry drainage overboard.
This one is built for above-the-water-line use. Think cockpit scuppers, livewell overflow, sink drains, anywhere water needs a clean path out that sits above your waterline. It is not a below-waterline fitting, so keep it above the load line and you're good.
The barb accepts a hose on the inside run, and the 2-7/8 inch outside diameter with a 4-3/16 inch overall length covers a common drain opening. White finish blends into most hull sides and deck edges. It's an honest, no-drama piece of plumbing hardware from a brand that's been making deck fittings for a long time.
Key Features
- White polypropylene construction, won't corrode or stain
- Thru-hull mount for above-the-water-line drainage
- Barbed inside connection accepts a drain hose
- 2-7/8 inch outside diameter fits a common drain opening
- 4-3/16 inch overall length
Why Buy from NVN Marine
- Authorized Sea-Dog reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Use With Hose For Drainage Above The Water Line; Thru-Hull Mount; 2-7/8 Inch Outside Diameter; 4-3/16 Inch Length; Polypropylene; White; Single |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 520790-1 |
| UPC | 035514520263 |
| Material | Polypropylene |
| Color | White |
| Outside Diameter | 2-7/8 Inch |
| Length | 4-3/16 Inch |
| Mount Type | Thru-Hull |
| Application | Drainage Above The Water Line |
| Connection | Use With Hose |
| Sold As | Single |
Frequently asked questions
Can I use this below the water line?
No. This fitting is rated for drainage above the water line only. For anything below your load line you want a proper seacock or below-waterline thru-hull.
What is it made of?
White polypropylene. It won't corrode, and it holds up well to sun and salt without staining the hull.
Does it connect to a hose?
Yes. The inside run is barbed for a drain hose, so you run your hose from the drain point to this fitting and it carries the water overboard.
What size opening does it need?
The fitting has a 2-7/8 inch outside diameter and is 4-3/16 inches long overall. Size your hull cutout to the fitting's threaded body per the instructions.
