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#1 2008-07-08 11:10:22

windyday
Member

Thetford or Sealand portable potty

After sitting staring for several days at the irregular empty space that used to be a head, contemplating either designing a wierd-shaped holding tank to replace that monster bladder, converting our V-berth freshwater tank to a holding tank (not a good idea in saltwater and unappealing anyway), or trying to engineer a holding tank into the V-berth, I am getting very interested in a Thetford or Sealand MSD III potty. I am beginning to warm up to the idea after reading all Peggy Hall's posts and other posters' experiences.

A Porta Potty (or Sealand alternative) like the MSD 465 can be plumbed through a Y valve and Whale manual pump for pumpout/pumpover and air vent if I really want to go that far. The 5-gallon tank is euqivalent to a standard 15 gallon holding tank because it uses less water/flush. I could convert all that empty space to usable cabinet space in the head, and glass over the toilet raw water intake throughull in the port V-berth locker. Quick disconnects are available for removing the cassette and replacing it with a spare, if need be. The overall cost is almost a third less than buying a new head and holding tank.

After 9 years with a fixed head/holding tank/macerator on the big boat I thought I might miss a full head, but right now this seems like a very attractive solution. Any experience with the MSD "portable" potties on C&C 27s?


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1974 C&C 27 Mk II in PEI


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1974 Mark II C&C 27

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#2 2008-07-27 22:48:11

rblade
Member

Re: Thetford or Sealand portable potty

Alex in Ottawa has a well documented process of building a new holding tank for a C&C 30.  It is posted on the CNC Photoalbum site on the main page.  I too had problems on my 1973 27 Mk II.  The tank was leaking when I bought the boat.  I removed the hardend bladder and associated smells.  I bought a Thedford (845 I think) port-a-potty as an interim solution.  It works fine but I plan on building a new tank from Alex's plans.  The Thedford base is a bit deeper and will not sit fully on the old head platform.  It overhangs on the inboard side.  The plastic clips to hold the potty down are not overly strong and the Thedford has popped off its mount a couple of times while the boat was heeled.  If you go with the port-a-potty route make sure you build up a new ledge to support the weight of the Thedford when fully filled.

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#3 2008-07-28 01:05:20

Guest

Re: Thetford or Sealand portable potty

use velcro to hold the porta potty to the floor- works much better than cheap plastic bracketscopasetic

#4 2008-07-28 07:13:32

windyday
Member

Re: Thetford or Sealand portable potty

rblade - thanks for the pointer to Alex's remarkable project. I can do that , but needed to be shown how. Never clicked that link because it was for a 30 - didn't realize how similar it is to the 27. Looks like a great solution.

To all:

Q1: how is a fibreglass tank for containing odours?

Q2: has anyone used the space in the C&C 27 locker in the port forward locker, outboard of the knotmeter and sounder thru hulls?

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1974 C&C 27 Mk II in PEI

Last edited by (2008-07-28 07:14:19)


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1974 Mark II C&C 27

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