We reserve the right to refund any order where freight is not a viable option. This is typically applicable to rural/remote areas where our couriers cannot service. We can accomodate rural/remote orders by arranging a custom freight quote - please reach out to us to arrange a quote.
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We accept the following methods; Visa, MasterCard, American Express, Afterpay and PayPal.
If you are a trade customer, please ‘add to quote’ and we will be in touch with trade pricing.
Delivery Services
See our delivery information for more details on our courier services.
Items will be dispatched from our Sydney/Melbourne/Brisbane warehouse as soon as we receive your order,for delivery timeframes, please see more here.
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Please see our Return and Cancellation Policy for more details.
Visit our help centre to view our full returns policy and more!
Returns and Cancellation Policy
We have a flat rate 20% of the purchase price return fee.
Please see our Return and Cancellation Policy for more details.
Visit our help centre to view our full returns policy and more!
Each brand and product has different warranty timelines and conditions. Please click here for further information or email us at sales@plumbersupplies and we will be in touch.
Description
Compact, compliant, and built for backflow protection.
The Watts 9D-AUS 20mm is a dual check backflow preventer designed to safeguard potable water systems from reverse flow in low-hazard applications. It features two independent check valves and an intermediate atmospheric vent that discharges to the atmosphere if a fault occurs — ensuring reliable protection in compact installations.
Ideal for boiler feeds, autoclaves, lab setups, and food service equipment, the 9D-AUS offers plumbers and facility managers a simple, WaterMark-approved solution for maintaining water safety.
🔧 Key Features:
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Dual Check Protection – Primary rubber-to-rubber and secondary rubber-to-metal check valves
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Atmospheric Vent – Releases water if either check valve fails, protecting the clean supply
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True Line Size – Full 20mm internal diameter for minimal pressure drop
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Versatile Installation – Suitable for vertical or horizontal pipe runs
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Built-In Strainer – Captures debris to prolong performance and reduce maintenance
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Durable Brass Body – Lead-free DZR brass with stainless steel internals
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WaterMark Certified – Fully compliant with Australian standards (WMK25866)
📐 Specifications:
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Size: 20mm
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Max Working Pressure: 12.1 bar (175 psi)
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Min Operating Pressure: 172 kPa (25 psi)
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Material: Forged brass body, stainless steel parts, rubber check discs
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Connection Type: Compression ends (may vary by supplier)
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Application: Indoor, low-hazard potable water backflow prevention
💡 Perfect For:
Hot water boilers, food and beverage machinery, dental chairs, autoclaves, sterilizers, and other equipment requiring backflow prevention in 15mm supply lines.
✅ Add to cart now and protect your potable water system with Watts – a global leader in precision plumbing solutions.
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