Sea-Dog Black Waste Deck Fill Replacement Cap, Keyless, Part 357094-1

The Sea-Dog 357094-1 is a black replacement cap for waste deck fills, designed to restore a secure, color-coded seal after the original cap is lost, cracked, or worn out. It is molded entirely from fiberglass filled injection molded nylon, so it contains no metal and never requires grounding to the boat's electrical system, eliminating corrosion concerns common with metal deck fill caps.

The cap features a built-in key for easy removal and installation. The key can be locked in the upright position for quick opening and closing, or recessed into the cap for a flush surface when not in use. The cap measures 1-7/8 inches in diameter with an 11-1/2 NPSM straight thread pitch, matching Sea-Dog waste deck fill bodies. Black is the designated color for waste system deck fills, keeping tank fittings clearly identifiable and helping prevent misidentification and cross-contamination between waste, water, fuel, and gas fill points.

This is a cap-only replacement part; it does not include the deck fill body, mounting fasteners, or an attachment chain (chains are included with gas, diesel, and water replacement caps, but not with the waste cap). It is compatible with Sea-Dog hose deck fills and will not work with pressurized oil injection systems.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 357094-1
• Color: Black
• Application: Waste Deck Fill Replacement Cap
• Cap Diameter: 1-7/8 inches
• Thread Pitch: 11-1/2 NPSM straight
• Material: Fiberglass filled injection molded nylon
• Weight: 0.09 pounds
• Grounding Required: No
• Attachment Chain Included: No
• Cap Removal: Built-in key, locks upright or recesses flush
• UPC: 035514357074

Fitment

Fits Sea-Dog waste hose deck fills using a 1-7/8 inch diameter, 11-1/2 NPSM straight thread cap opening. Will not work with pressurized oil injection systems.

Frequently Asked Questions

What does the 357094-1 cap fit? The Sea-Dog 357094-1 is a replacement cap sized for Sea-Dog waste hose deck fills, with a 1-7/8 inch diameter and 11-1/2 NPSM straight thread that matches the deck fill body opening.

Why is this cap black? Black is the designated color for waste system deck fills in the Sea-Dog lineup, while red marks gas, green marks diesel, and blue marks water, so the color coding on the 357094-1 helps prevent misidentifying which tank a fitting connects to.

Does the 357094-1 cap include an attachment chain? No, the waste replacement cap does not include an attachment chain. Sea-Dog includes attachment chains with the gas, diesel, and water replacement caps, but the waste cap is supplied without one.

What material is the 357094-1 cap made from? It is molded entirely from fiberglass filled injection molded nylon, so the cap contains no metal and does not require grounding to the boat's electrical system.

How do you open and close the cap? The 357094-1 has a built-in key for easy removal: lock the key in the upright position for quick opening and closing, or recess it into the cap for a flush surface when it is not in use.

Does this cap include the deck fill body? No, the 357094-1 is a cap-only replacement part. The deck fill body itself is a separate part, and mounting fasteners are not included with either.

What is the thread size on the 357094-1 waste cap? The cap uses an 11-1/2 NPSM straight thread with a 1-7/8 inch cap diameter.

Can this cap be used with a pressurized oil injection system? No, Sea-Dog states that these deck fill caps will not work with pressurized oil injection systems.

How much does the 357094-1 cap weigh? The Sea-Dog waste replacement cap weighs 0.09 pounds.

Is the 357094-1 an OEM Sea-Dog part or an aftermarket copy? It is a genuine Sea-Dog replacement cap, part number 357094-1, manufactured to match Sea-Dog's own waste deck fill bodies.