Boatbuilding - The Head (Toilet)

"Yacht toilet? Sani-Loo or holding tank?"

"Where do I start?"

The thoughts of smell, sewerage and blockages soon come to mind and no matter how many ideas you come up with to exclude one from maintaining "The Loo", the fact is that you are going to get your hands dirty some day.

The thoughts here were simple, get the widest base which in the long run will improve stability and securing to the floor when compared to the smaller bases and some of the stories floating around.

Secondly, get the whole lot automated. In today’s world, these systems have been well designed and improved on and are now very reliable.

For the extra few dollars, this also provides that little bit extra padding (so to speak) and keeps the law on our side.

In summary, waste is sent directly overboard, or via a selector to the holding tank.

We have chosen this way for:

  1. Simplistic installation,
  2. KISS (Keep it simple Sailor) right up our ally, and
  3. Compliance with the new State Sewerage Treatment Regulations.


Aft Saltwater Inlet

We have chosen to place a single saltwater inlet for the toilet under the shower floor, where access is easy and other 'wet area' components are stationed.

From there, the saltwater goes through a Marelon Seacock (ball valve) to a tee, one side to the toilet and the other to the deckwash.

We have had tremendous trouble here as no one seems to make a 'skin-fitting+90 degree elbow' (in bronze) that will hug the floor. They all protrude some distance from the skin fitting making the area required very deep.

We have chosen to use high pressure PVC pipe in this area as the floor area will be glued and screwed and we can't afford to pull this up in the event of a plastic pipe replacement.

The only access here will be via the ' shower access door ', a simple piece of resined ply.

Being below waterline, this section of the hull has been glassed as its going to get wet from the shower waste, saltwater inlet maintenance and a point for the removable speed-transducer.

This area was also prewired to allow the insertion of our first automatic bilge. Its job being two-fold, to remove shower ater and act as an emergency bilge, whether on the yacht or while away.



Drawing of Water System

One pressure pump, serving all freshwater outlets, hot water system and filtered water.




Freshwater Overview

Our catamaran water system carries three types of water - saltwater, freshwater (drinkable) and freshwater (non-drinkable).

The saltwater outlets include:

  1. The toilet (in the vanity area),
  2. Deck-wash (in the vanity area), and
  3. Desalinator (forward starboard hull).

Freshwater outlets include:

  1. The shower (in vanity area),
  2. Outside shower (starboard aft hull),
  3. Vanity wash basin (non-drinkable), and
  4. Galley sinks (drinkable and non-drinkable).

A Sailing Catamaran Building Project has more expanded information on this topic with many more photos.


'get the whole lot automated. In today’s world, these systems have been well designed and improved and are now very reliable'