New South Wales Repealed Regulations New South Wales Repealed RegulationsThis legislation has been repealed.
(Clause 22H)
(1) Materials in contact with sewage must be resistant to the effects of toilet water or fresh or salt water flush, the marine environment, disinfectants, deodorants, cleaning agents and chemical compounds in solid, liquid or gaseous form or of a toxic or explosive nature likely to be generated in the operation of a holding tank.Note: Typical materials for holding tanks include stainless steel lined with rubber, polyester resin fibre reinforced plastics and fibre reinforced plastics or poly vinyl chloride without a metal shell.
(2) The materials of which the holding tank is constructed must be chemically and galvanically compatible.
The holding tank must be manufactured to meet the following requirements:
(a) the tank must be capable of operation when heeled 15 degrees to either side (or, in the case of a sailing craft, 30 degrees) and trimmed 10 degrees by bow or stern,
(b) the design of the tank must preclude the possibility of back-siphoning,
(c) the design of the tank must prevent the escape of toilet waste to the interior or the exterior of the vessel under all conditions of heel or trim,
(d) the tank must be securely fastened by means other than any connected piping,
(e) fittings and openings must be accessible for maintenance and cleaning,
(f) the tank must not have any common boundary with any potable water tank,
(g) the tank must be constructed in such a manner as to have a smooth uninterrupted interior surface free from any projections,
(h) the lower part of the tank must be sloped to be self-cleansing.
The toilet pan must be located as close as practicable to the top of the tank and an inlet connection to the tank must terminate not less than 75 mm inside the tank.
The outlet pipe from the tank must have a minimum nominal bore of 40 mm and be fitted so that not more than 40 mm depth of waste remains in the tank after discharge of the tank contents. The upper end of the outlet pipe must be rigidly attached to the vessel and must be exposed on, or accessible from, the deck of the vessel. The upper end of the outlet pipe must be fitted with the female side of an approved quick coupling device of 40 mm nominal bore. A removable gas-tight cover that is capable of protecting the seal must be positioned over this coupling.
A vent pipe of 38 mm nominal bore must be fitted to the top of the tank and must extend to a point outside the vessel, being a point not less than 300 mm above the level of the toilet seat pan.
If the outlet pipe from the tank is not alternatively used as a flushing water inlet to the tank, a pipe of 38 mm nominal bore must be fitted to the top of the tank and be used for that purpose. The upper end of the flushing pipe must be fitted with the female side of an approved quick coupling device of 38 mm nominal bore and this coupling end must be rigidly attached to the vessel and be exposed on, or accessible from, the deck of the vessel. A removable gas-tight cover that is capable of protecting the seal must be positioned over this coupling.
Except where a toilet with a mechanical seal is mounted directly on top of the tank, an accessible inspection opening of 100 mm diameter must be located in the top of the tank and must be fitted with a removable gas-tight cover.
When all removable gas-tight covers are secured in position, the tank and its fittings (except for the vent pipe) must be thoroughly gas-tight under normal operating conditions.
(1) The holding tank and the connecting piping or tubing (including all fittings) must be pressure tested with water as follows:(a) the pressure is to represent a water column of 1.5 times the distance between the tank top and the top of the venting pipe,(b) the minimum height is to be not less than 2 metres of water column,(c) the tank must hold the water pressure for 30 minutes without any leakage.
(2) The holding tank and the connecting piping or tubing (including all fittings) must withstand the following pump-out test:The tank is to be emptied with a 170 litre per minute positive displacement pump that remains in operation for 30 seconds after emptying of the tank.