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Old 26-10-2018, 01:36   #1
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Do I need a thru-hull fitting and ball-valve for the outlet of my new toilet

Hi All,

I just had an electric macerator toliet fitted and I've been advised to fit a thru-hull fitting and ball-valve for the outlet of my toilet? and being new to boat ownership I'm not clear on why and it wasn't explained.

Is it to stop water coming in the wrong way potentially when the boat is left for periods of time, or when on passage? Or is it a legal thing or some other reason?

Thanks in advance for your input.
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Old 26-10-2018, 02:40   #2
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Re: Do I need a thru-hull fitting and ball-valve for the outlet of my new toilet

Yes and you will probably need two. One for the inlet and one for discharge, also they are different sizes. You might consider Trudesign rather than bronze for a material. I am just changing ours over now.

Do you have any local regulations requiring a holding tank?

Manual Ball Valve | TRUDESIGN
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Old 26-10-2018, 03:04   #3
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Re: Do I need a thru-hull fitting and ball-valve for the outlet of my new toilet

If the outlet isn't connected to a through hull, where does the poo go?

I guess you could flush entirely to a holding tank, but you'd constantly be looking for the next pump out facility.

Having a valve on the through hull is just sensible. You're protected against failure of the hose or if the toilet rim is below the waterline, even a leaky joker valve could flood the boat.
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Old 28-10-2018, 23:51   #4
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Re: Do I need a thru-hull fitting and ball-valve for the outlet of my new toilet

It's replacing a pump out that was there previously, connected via a hose straight out to the water via a throughull. I gather they are just saying to me that instead of it just going directly out (and potentially water feeding back in) that I should also have a ball valve for the reasons you suggest. Thanks I'll get one fitted. That way it also gives me the option of putting in a holding tank and redirecting to that.
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