Canadian regulations
That is a good idea. In fact I know of another sailor who has the same kind of porta-potti on his Pearson 30. He sailed last season in the North Channel with it, but he did not have it hooked up to any hose for pump-out. His boat was never inspected by any custom's officers. I did a little research on their web page and this is the Canadian's regulation for a holding tank on a vessel.
Holding Tank
6. Where a pleasure craft is fitted with a holding tank, the tank shall
(a) be an integral part of the hull structure of the pleasure craft or be securely attached to the hull;
(b) be constructed of structurally sound material that prevents the tank contents from leaking;
(c) be resistant to corrosion by sewage;
(d) have an adequate capacity for the craft's normal complement;
(e) be provided with a discharge connection and piping system for the removal of the tank contents by a pumping facility;
(f) be designed so that the level of sewage in the tank may be determined without the tank being opened and without contacting or removing any of the tank contents, or be equipped with a device that allows that determination to be made; and
(g) be equipped with ventilation device that
(i) has its vent outlet located on the outside of the pleasure craft and in a safe location,
(ii) prevents the build-up within the tank of
pressure that could cause damage to the tank,
(iii) is constructed of material that cannot be
corroded by sewage, and
(iv) has a flame screen of non-corrosive material fitted to the vent outlet.
Liz Fagel
s/v Fagel Attraction II
Pearson Commander #75