On Mon, 08 May 2006 11:06:11 GMT, Peggie Hall
wrote:

Mic wrote:

On Sun, 07 May 2006 23:32:14 GMT, Peggie Hall
wrote:


krj wrote:


How many days will a 13 gallon tank last for 2 people before having pump
it out?


Here's the math you need to know about how long it will take to fill up
any size tank:

The average adult uses the toilet 5x/day...average flush is .6 gal. So
each person continuously aboard will put about 3 gal/day into the tank.

But if you had a Therford with a 5 gallon holding the average use per
flush is about 53 uses till full.

That would be true of any similar size portapotty, whether portable or a
permanently installed "pumpable" version. However, while 53 flushes may
SEEM like a LOT more, when you remember that two people = 10
flushes/day, it's only an average of about 5 days vs 3 with a manual
toilet if you know how to use the "dry" mode to conserve flush water.

--
Peggie

http://www.thetford.com/portable_main.cfm

Porta Potti 585
62 Avg. # Flushes

53 was a wild guess the 585 model avg. 62

It seems that many prefer this option to the standard config. on a
retro fit for thoses vessels less than 28ft and for casual boating
seems to make sense, practically and cost wise. Although in
outfitting an ocean going vessel this option is not desirable in heavy
seas?

The volume created using the conventional system is considerably more
per use than the thetford system as are the maintenance issues and
cost.

http://www.pocketcruisers.com/art_portapotti.html
In Praise of the Humble "Porta Potti"
By Buzz Pratt, Pocket Cruisers

Which system would you advise on and why? I guess it would relate to
the size of the vessel as well.