Looking for a round access hatch *waterproof*

I already tried two different models:

this one is not watertight at all


This one is waterproof. But you need to much force to turn it for pressing the lid against the seal.

Does anybody found a good one?

I have had great luck with these. They come in black or white in a few different sizes. They have a built in seal.


Should be this one, right?


Is 8" enough to put 6S 20Ah Hobbyking Lipo through? What is the height of it?

I’m using those but they are 4 inch, very waterproof and easy to open/close if you grease the o-ring.
i’m just using the hatch to turn the board on and off, and remove the plate where they are mounted.


there are 6 inch versions too:

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I’ve noticed Beckson makes a lot of hatches including those on West Marine’s website. Seems like a legit product.

This is also a good hatch (confirmed by cristophe):


My board has a thickness of 10cm. The lipos have a height of 70mm. So it’s almost not possible to use a rectangular hatch because of its height.

Is it watertight? I used osculati and water entered easily in seconds…
I tried 3 different round hatches, all where watertight

Hi bender: could you share the links for those hatches?

I bought them at my local boat shop. I will try to find the brand

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Anybody tried a large screw on lid designed for a large bucket yet?

I’ve used this for my jet board. (obviously you need to cut the bottom part down)
Sizes from 110mm up to 315mm