Full size porta potty?

NINEv2

.
Jul 21, 2020
88
Catalina 250 Black Hills
Howdy all. One of the many projects for the new boat is the loo. We currently have a new porta potty in the head, but I can't help notice how small the actual bowl is on just about every 'throne' out there. Does anyone know of a mfr that makes a porta potty with a seat size and depth similar to a home toilet? My runs through the googles have come up short so far.
 
Apr 8, 2011
470
Hunter 36 Deale, MD
There are at least two different sizes of "standard" marine head bowls - compact and regular. My guess is you have a compact. Here's the difference in the Jabsco brand (from the Jabsco website and converted from MM to inches):

Compact: 17.9" wide, 16.7" deep, 13.6" high
Regular: 18.5" wide, 19.1" deep, 13.6" high

Raritan seems to have a wider (no pun intended) selection of premium toilets - some of which look to be significantly taller than the Jabsco offerings. Their Atlantes Freedom shows these measurements, which include 7 bowl sizes!!

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Good luck.
 
Dec 2, 1997
8,129
- - LIttle Rock
Instead of converting to any marine toilet (all of the Raritan models #tfox mentioned are high end macerating electric toilets that would be waaaay overkill for a 25' boat!) which will also require adding a holding tank and all the related plumbing needed with them that may include installing a new below-waterline thru-hull for the flush water intake line if there isn't one already installed, there's a Plan B makes a lot of sense on a boat the size of yours: An "MSD" portapotty.

The "MSD" designation in the model name/number means it has fittings for a pumpout line and vent line, and is designed to be permanently installed (actually just sturdier brackets than portables, so you could still take it off the boat if you absolutely have to), which means that although it's still called a PORTApotty, you don't have to carry anything including urine jugs off the boat to empty it.

A 5-6 gallon model is household height and holds 50-60 flushes...you'd need at least a 30 gal tank to hold that many from a manual marine toilet. No plumbing needed except a vent line and pumpout hose--so no new holes in the boat...and -0- maintenance needed except for rinsing out the tank--which you can do with a bucket while it's being pumped out. Total cost including the pumpout hose and vent line--and also a deck pumpout fitting if you don't already have one installed is about $250--a fraction of what you'd spend for toilet, tank and all the related plumbing needed. And the best part is, you have all the advantages of a toilet and holding tank without giving up a single square foot of storage space AND a size and height that isn't like squatting on a bucket!

If this idea appeals to you check out the Dometic (formerly SeaLand) 975 MSD SaniPottie.

A number of people here who have 25-29' have installed MSD portapotties and love 'em...hopefully at least a couple of 'em will chime in here.

--Peggie


 

NINEv2

.
Jul 21, 2020
88
Catalina 250 Black Hills
Instead of converting to any marine toilet (all of the Raritan models #tfox mentioned are high end macerating electric toilets that would be waaaay overkill for a 25' boat!) which will also require adding a holding tank and all the related plumbing needed with them that may include installing a new below-waterline thru-hull for the flush water intake line if there isn't one already installed, there's a Plan B makes a lot of sense on a boat the size of yours: An "MSD" portapotty.

The "MSD" designation in the model name/number means it has fittings for a pumpout line and vent line, and is designed to be permanently installed (actually just sturdier brackets than portables, so you could still take it off the boat if you absolutely have to), which means that although it's still called a PORTApotty, you don't have to carry anything including urine jugs off the boat to empty it.

A 5-6 gallon model is household height and holds 50-60 flushes...you'd need at least a 30 gal tank to hold that many from a manual marine toilet. No plumbing needed except a vent line and pumpout hose--so no new holes in the boat...and -0- maintenance needed except for rinsing out the tank--which you can do with a bucket while it's being pumped out. Total cost including the pumpout hose and vent line--and also a deck pumpout fitting if you don't already have one installed is about $250--a fraction of what you'd spend for toilet, tank and all the related plumbing needed. And the best part is, you have all the advantages of a toilet and holding tank without giving up a single square foot of storage space AND a size and height that isn't like squatting on a bucket!

If this idea appeals to you check out the Dometic (formerly SeaLand) 975 MSD SaniPottie.

A number of people here who have 25-29' have installed MSD portapotties and love 'em...hopefully at least a couple of 'em will chime in here.

--Peggie
Straight from the Head Mistress herself. Thank you! I will certainly look into it, and I'm open to any and all suggestions that don't involve onboard holding tanks/straight up marine heads.
 
Nov 22, 2011
981
Ericson 26-2 San Pedro, CA
Straight from the Head Mistress herself. Thank you! I will certainly look into it, and I'm open to any and all suggestions that don't involve onboard holding tanks/straight up marine heads.
I did this on my Ericson 26-2 at Peggy's suggestion, and it is a great solution.
 
Nov 8, 2007
1,396
Hunter 27_75-84 Sandusky Harbor Marina, Ohio
We have sailed our Hunter 27 over 7,000 nm on the Great Lakes over 21 summers with her original MSD toilet, piped for pump-out. No odors with Odorlos (or another oxygen source). No maintenance issues. And more capacity than a comparable marine toilet because there is no flush water.
 
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Dec 2, 1997
8,129
- - LIttle Rock
I believe the sbo.com online store has the SeaLand 975MSD
--
And more capacity than a comparable marine toilet because there is no flush water.
Weelll... you should be using enough to rinse the bowl---about a cupful, anyway. Besides, solids and TP do need a little water in the tank to dissolve.
 
Apr 8, 2011
470
Hunter 36 Deale, MD
Instead of converting to any marine toilet (all of the Raritan models #tfox mentioned are high end macerating electric toilets that would be waaaay overkill for a 25' boat!) which will also require adding a holding tank and all the related plumbing needed with them that may include installing a new below-waterline thru-hull for the flush water intake line if there isn't one already installed, there's a Plan B makes a lot of sense on a boat the size of yours: An "MSD" portapotty.
I will definitely chime in here - Peggie gave me this EXACT advice over the phone around a decade ago when I owned a 1974 Catalina 27. It was the PERFECT solution for that boat, and SUPER easy to install (thanks again Peggie).

I will say, however, that you'll need to decide if it resolves one of your problems as initially stated, which was the seat size. As I recall the seat on the MSD was on the smaller side of boat toilets, and I didn't see any options for bigger seats like the high end toilets I mentioned previously.
 

NINEv2

.
Jul 21, 2020
88
Catalina 250 Black Hills
Thanks for the input everyone. We wound up ordering two from amazon to um... try on? And we wound up going with this:


Weight, bowl size, and capacity seemed about right for us. Now I need to go to home depot to order the mounting plate because of course it's out of stock everywhere else :banghead: