Zurn Wilkins - 350LXL Series - Backflow Preventer 20-25mm

The Zurn Wilkins 350 Series Backflow Preventer is a Medium Hazard, High-Performance Low Head Loss Backflow Preventer that features a lightweight ductile iron body, offering durability and easy installation. Constructed with corrosion-resistant low-lead materials, as well as all-plastic and stainless-steel components, this backflow preventer guarantees long-lasting reliability, ensuring a secure and efficient water system.

Typical Application

Designed for installation on water lines to protect against both back siphonage and backpressure of polluted water into the water supply. Double Check Valve Assembly shall provide protection where a potential health hazard exists. (Medium Hazard)

Standard Compliance

• Australian Watermark (AS/NZS 2845.1) Certified Lic. 1379

Operating Parameters

Maximum working water pressure: 1200kPa

Maximum working water temperature: 82°C

Hydrostatic test pressure: 2400kPa

Materials

Housing: Reinforced Nylon

Fasteners: Stainless Steel, 300 Series

Elastomers: Silicone, Buna Nitrile

Internals: Delrin

Springs: Stainless steel, 300 series

Body: Cast Bronze, Lead-Free

End connections: Male Threaded BSPT

Test connections: 1/4" SAE 45° Flare

Flow characteristics

Model 350 20 and 25mm (standard and metric)

The Double Check Valve Backflow Preventer shall be Australian Watermark Certified (AZ/NZS 2845.1), rated to 82°C and supplied with male pipe thread tailpieces. The main body shall be Bronze. The housing shall be reinforced Nylon and the seat disc elastomers shall be silicone. The first and second checks shall be accessible for maintenance without removing the device from the line. The Double Check Valve Backflow Preventer shall be a ZURN WILKINS Model 350.

Typical Installation

Local codes shall govern installation requirements. To be installed in accordance with the manufacturers’ instructions and the latest edition of the Plumbing Code of Australia and/or AS/NZS 3500.

Dimensions and Weights