Cockpit floor hatch?

[Travelling Westerly]

Im after a waterproof cockpit floor access hatch so I can access the top of my fuel tank to clean it out. Has anybody ever procured/fitted a truly waterproof access hatch good enough for a cockpit floor?

Thanks

 

[pvb]

Look for aluminium access hatches. Strong, but not cheap. Eg - Aluminium Watertight Hatches - 3 Colours -4 Sizes

 

[Hacker]

If you have a separate wooden slatted sole the one option is a Lewmar style hatch. Saw one fitted in the cockpit of a Cornish Yawl, great lateral thinking with the benefit of providing light into the space below