Clark Tanks water tanks are supplied with a range of quality fittings as standard, including WaterMark-approved lead-free brass outlet fittings and a lever-operated ball valve.
Standard Tank Fittings & Inclusions
The following fittings are included with Clark Tanks water tanks:
- 400mm Inlet Tank Screen – helps prevent leaves and other debris from entering the tank.
- 90mm Mozzie Stopper Overflow Screen – helps prevent mosquitoes and other pests from entering through the overflow.
- WaterMark-Approved Lead-Free Brass Tank Flange – provides a durable connection point for the tank outlet.
- WaterMark-Approved Lead-Free Brass Lever Ball Valve – allows the water supply from the tank outlet to be opened or shut off.
Fitting installation is carried out on-site by Clark Tanks’ delivery team where required, including installation of the outlet and overflow strainer.

Standard Outlet & Ball Valve Sizes
The standard brass outlet flange and ball valve sizes vary according to tank capacity:
- Up to 15,000L: 25mm
- 22,700L–31,800L: 40mm
- 40,000L–50,000L: 50mm
Refer to the individual tank product page for the fittings applicable to your chosen model.
Additional Fitting Requirements
Clark Tanks also offers a range of additional optional fittings, including:
- Additional brass outlets and ball valves (25mm, 40mm and 50mm)
- 25mm brass lever tap with 25mm × 20mm flange
- 50mm Camlock Fire Kit (QLD)
- 65mm Storz Fire Kit (NSW)
- 50mm CFA Fire Kit (VIC)

