Skip to content
Now offering free shipping on all orders over $99! See details.
Now offering free shipping on orders over $99!

Marine Deck Fill Cap – Boat Water & Fuel Hatch Cover with Stainless Steel Chain

Original price $5.90 - Original price $5.90
Original price
From $5.90
$5.90 - $5.90
Current price $5.90
Availability:
100 in stock, ready to be shipped
Availability:
98 in stock, ready to be shipped
Availability:
100 in stock, ready to be shipped
Availability:
100 in stock, ready to be shipped

Free returns on all eligible orders

You have 14 days to request a return. All sale items are final sale.

No More Lost Caps or Leaking Hatches — Built for the Harshest Marine Conditions

A missing deck fill cap or a cracked, ill-fitting hatch cover is more than an inconvenience — it's a contamination risk and a safety hazard. This PUM + Nylon marine deck fill cap fits a standard 50mm cutout and connects to a 38mm inner diameter hose, making it compatible with the vast majority of existing boat and RV installations. The stainless steel retaining chain keeps the cap secured to the fitting at all times, so it can never be lost or misplaced. Available in White and Black, with Blue caps for water hatches and Red caps for fuel hatches — a clear, industry-standard color coding system that prevents dangerous mix-ups.

🔺 Product Details

Key Features

  • Stainless Steel Retaining Chain — Cap stays attached to the fitting at all times; never lost or misplaced
  • Color-Coded Caps — Blue = Water, Red = Fuel; prevents accidental cross-filling
  • PUM + Nylon Construction (No Fiberglass) — High hardness, corrosion-resistant, UV-resistant, and anti-aging material
  • Tool-Free Twist Open — Easy hand-operated rotary cap; no tools required
  • Standard 50mm Cutout — Fits most pre-drilled boat and RV deck holes
  • 38mm Inner Hose Connection — Compatible with standard marine hose fittings
  • Flush-Mount Design — Low-profile, clean finish that sits flush with the deck surface
🔺 Specifications & Installation

Specifications

  • Material: PUM + Nylon (fiberglass-free)
  • Overall Height (H): 70mm
  • Flange Outer Diameter (D): 85mm
  • Cutout Diameter (d): 50mm
  • Hose Inner Diameter (di): 34mm
  • Hose Outer Diameter (d2): 38mm
  • Mounting Hole Spacing (d1): 40mm
  • Available Colors: White body / Black body
  • Cap Color: Blue (Water) or Red (Fuel)

Ideal Applications

  • Boat and yacht water tank fill points
  • Marine fuel deck fills
  • RV and campervan water inlets
  • Pontoon boats and motorboats
  • Any vessel requiring a sealed, labeled deck access point

Why Choose ROQIFY

Backed by over 10 years of manufacturing and export experience, ROQIFY is committed to providing reliable RV and marine solutions trusted by customers worldwide
10+ Years Industry Experience
Exported to 100+ Countries Worldwide
Reliable Quality Control & Testing
Competitive Factory Direct Pricing
Professional OEM & ODM Support
Fast Response & Customer Service
Trusted by RV & Marine Customers Globally
ROQIFY®
Powered by Jiangsu Yumu Electromechanical Co., Ltd.
Reliable Solutions for RV & Marine Living.

Free Shipping

On small accessories orders over $99-$159

Here to Help

Get in touch with us 7 days a week

10+ YEARS EXPERIENCE

Trusted marine & RV accessories supplier

AFTER-SALES SUPPORT

Professional service you can rely on