Orders are shipped within 2 to 4 business days Ex Warehouse. If you would like a more accurate time frame, please reach out to us.
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.
Payment Methods
Budgeting for a renovation or new build? We have a range of options to pay including buy now and pay later solutions to suit your circumstances.
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.
Estimate Shipping
Please see our Return and Cancellation Policy for more details.
Visit our help centre to view our full returns policy and more!
Returns Information
You have 30 days from date of purchase to return your product. For change of mind purchases, the customer is to return the goods to 2/71 Jijaws Street, Sumner at their expense. As the item has already been shipped, the initial shipping fee paid will not be refunded.
My order was damaged or faulty
Your satisfaction is our priority! If you've ordered an item that damaged or faulty, please email sales@plumbersupplies.com.au.
We encourage you to inspect all orders within 24 hours of receiving them, even if your renovation is not yet underway. We cannot accept damage claims after this 24 hour period as we cannot determine when or how the damage occurred.
We require photographic evidence of the damages are required within 24 hours of receiving an order.
We also do not accept damages that occur as a result of product installation.
Change of mind - within 30 days of purchase
You must return the goods to 2/71 Jijaws Street, Sumner QLD 4074. A restocking fee of 20% will be incurred across all items returned.
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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