An approved isolation valve and non return valve must be installed in the supply line to the water heater.
A pressure limiting valve (PLV) and expansion control valve may also be required.
Duo Valve Requirements - Mains Pressure Storage
An approved isolation valve and non return valve must be installed in the supply line to the water heater.
Jason Bright
Updated 19 July 2026
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Compliance & Onboarding Enquiries Email: pm@taskforce.com.au --------------------------------------------------- Work Orders Email: pm@taskforce.com.au ------------------------------------------
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