Sea-Dog Blue Water Deck Fill Replacement Cap 357093-1, Keyless Design

The Sea-Dog 357093-1 is a blue replacement cap for water deck fills, designed to thread directly onto Sea-Dog hose deck fill bodies. The cap uses a built-in key for removal instead of a separate loose key, so there is nothing extra to lose overboard. The key can be locked in the upright position for quick opening and closing, or recessed into the cap for a flush surface on deck.

The cap is color-coded blue to identify water service, matching Sea-Dog's color system across gas (red), diesel (green), oil (black), and waste (black) caps. This color coding helps prevent the wrong fluid from being added to the wrong fill, which can cause costly contamination problems. The cap includes an attachment chain to keep it tethered to the deck fill body when open.

Construction is fiberglass filled injection molded nylon, so the cap contains no metal and does not require grounding to the boat's electrical system. The cap has a 1-7/8 inch diameter and a straight 11-1/2 NPSM thread pitch to match Sea-Dog hose deck fills. It connects to the boat's water reservoir through the deck fill body via hose (hose not included).

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 357093-1
• Color: Blue (Water)
• Product Type: Deck Fill Replacement Cap
• Cap Diameter: 1-7/8 inches
• Thread Pitch: 11-1/2 NPSM straight
• Material: Fiberglass filled injection molded nylon
• Key Type: Built-in, keyless removal
• Chain Included: Yes
• Grounding Required: No
• Weight: 0.096 pounds
• UPC: 035514357067

Fitment

Fits Sea-Dog hose deck fills with 1-7/8 inch, 11-1/2 NPSM straight thread caps.

Frequently Asked Questions

What does the color blue mean on this Sea-Dog deck fill cap? Blue indicates water service on Sea-Dog deck fill caps, part of a color-coded system that also uses red for gas, green for diesel, and black for oil and waste, so the 357093-1 cap should only be used on a water fill.

Does the Sea-Dog 357093-1 cap need a separate key to open? No, the 357093-1 has a built-in key that can be locked in the upright position for opening and closing or recessed into the cap for a flush deck surface, so there is no loose key to carry or lose.

What size thread does this replacement cap use? The Sea-Dog 357093-1 cap has a 1-7/8 inch diameter and a straight 11-1/2 NPSM thread pitch, matching Sea-Dog hose deck fill bodies.

Is a chain included with the cap? Yes, the 357093-1 blue water cap includes an attachment chain to keep the cap tethered to the deck fill body when it is open.

What material is the cap made from? The 357093-1 is made of fiberglass filled injection molded nylon, so it contains no metal and does not require grounding to the boat's electrical system.

How much does the Sea-Dog 357093-1 cap weigh? The blue water replacement cap weighs 0.096 pounds.

Will this cap work with a pressurized fuel or oil injection system? The 357093-1 is intended for water deck fills; consult Sea-Dog's fitment guidance for oil injection compatibility before use on a fuel or oil system.

Can this cap be used on a diesel or gas deck fill instead of water? The 357093-1 is color-coded blue specifically for water; for diesel or gas fills, Sea-Dog offers separate green and red replacement caps under different part numbers.

How does the deck fill cap connect to the water tank? The deck fill body connects to the boat's water reservoir through a hose, which is not included with the 357093-1 replacement cap.

What is included in the box with part 357093-1? The package includes the blue water replacement cap with its built-in key and attachment chain; the deck fill body and mounting hardware are sold separately.

Is the 357093-1 an OEM Sea-Dog part? Yes, 357093-1 is the genuine Sea-Dog manufacturer part number for the blue water replacement cap.

Does the cap sit flush with the deck? Yes, the built-in key on the 357093-1 can be recessed into the cap so it sits flush with the deck surface when not in use.