Redundant through hull. Seacock or blocking cap?

[The Brewster and The Bard]

I'm getting rid of one of the 2marine toilets in my boat, I'll be leaving one of them but replacing the second one for a waterless toilet, at least for the time being. If I get use to the waterless toilet and like it I'll be removing the remaining marine toilet to make room for a wet room/decent shower.
Both seacocks attached to this toilet are in bad condition as well as the skin fittings. I don't think I really want to permanently get rid of the through holes in case in the future I sell the boat and the next owner wants to go back to marine toilet.
So my question is, do I replace the through hole and seacock and leave it permanently closed or can I just have the skin fitting with a blanking cap on it?
Is this a good idea?

 

[jrudge]

I suspect a waterless toilet is a bad idea.

Put a Seacock in it you can then revert it back when statement 1 above is found to be true

 

[jfm]

I agree. Suggest you install new skin fitting and seacock (or cap the skin fitting), as you have announced “bad condition” on a public forum (!). #insurersreadthis.

 

[jimmy_the_builder]

I agree. Suggest you install new skin fitting and seacock (or cap the skin fitting), as you have announced “bad condition” on a public forum (!). #insurersreadthis.

Where's the appropriate emoji?

 

[petem]

Where's the appropriate emoji?

He's run out after yesterday.

 

[Bandit]

If you have a redundant skin fitting, remove it and glass it up properly. Its a simple job to cut a new hole if you need to fit a skin fitting in the future.

If you have a poor condition skin fitting: leaking, sweating, crusty, not sure if it closes fully etc. There is one answer replace fitting and valve with new DZR units dont muck about.

Never use brass of fittings of indeterminate quality.

 

[DavidJ]

Have a look at the Leesan Tru Design products. I’ve just had one fitted to replace a very stiff (old) DZR toilet outlet.
https://www.leesan.com/shop/seacock-kits

 

[5teve]

I've just been through this for a redundant strainer / thru hull... Strainer was in the way and used to be for a deck wash... Which is no more (and could have t'd off Genset strainer) I was going to cap the thru hull.. but decided on a new seacocks and plug.. just in case I need to recommission it.. I can get away with 2 years in the water if I dive the props every 6 months or so... So would save a lift.. although I've changed seacocks in the water with minimal hassle..

Steve

 

[ctva]

I have had the same issue with replacing two transducers to a single unit. All I did was replace with a new DZR skin fitting and blanking cap as a belt and braces, I filled the void with Sikaflex so that it is smooth from the outside. Recommissioning including removal of the Sikaflex will be relatively simple. Been in for 4 years now and sound.

The option of removal and glassing is quite an involved job to do it correctly as it needs the removal of quite a large area around the hole to provide a very shallow countersink from which layers are built up. I didn't fancy that and preferred the mechanical plug.