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

Deeco - Zurn Wilkins - 350 Series Double Check Valve Backflow Preventer- Product Image
Brand: Zurn Wilkins
Category: Backflow Prevention, 350 Series
Size Range:

20-25mm

Other Sizes:

32-50mm

65-250mm

Connection:

Threaded Male BSPT

Product Description

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
Zurn Wilkins - 375LXL32-50mm - Watermark

Technical Data

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)

Zurn Wilkins - 350LXL20-25mm - Flow Rates

Zurn Wilkins - 350LXL20-25mm - Flow Rates

Technical Specifications

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.

Zurn Wilkins - 350LXL32-50mm - Typical Installation

Zurn Wilkins - 350LXL20-25mm - Typical Installation (Above ground)

Zurn Wilkins - 350LXL32-50mm - Typical Installation

Zurn Wilkins - 350LXL 32-50mm - Typical Installation (Vertical, underground)

Dimensions and Weights

Zurn Wilkins - 350LXL20-25mm - Dimensional Diagram
Zurn Wilkins - 350LXL20-25mm - Dimensions and Weights

Zurn Wilkins - 350LXL20-25mm - Dimensions and Weights

Zurn Wilkins - 350LXL Series - Backflow Preventer - Repair Kits

Product Code Size Description
RK34-350 20mm Model 350LXL - Check Module Set - Complete Kit
RK1-350 25mm Model 350LXL - Check Module Set - Complete Kit
RK114-350 32-50mm Model 350LXL - Check Module Set - Complete Kit
RK114-350R 32-50mm Model 350LXL - Repair Kit - Rubber Only
RK34-350-Product Image
Pos. Description Qty
1 Check Assembly #1 1
2 Check Assembly #2 1
3 O-Ring for Housing Outlet 1
4 O-Ring for Housing Inlet 1
RK1-350-Product Image
Pos. Description Qty
1 Check Assembly #1 1
2 Check Assembly #2 1
3 O-Ring for Housing Outlet 1
4 O-Ring for Housing Inlet 1
RK114350 Product Image
Pos. Description Qty
1 #1 Check Assembly 1
2 #2 Check Assembly 1
3 O-Ring for Ball Valve 2
4 O-Ring for Sleeve 1
5 O-Ring for #1 Seat 1
RK114350R  Product Image
Pos. Description Qty
1 Seal Ring for #1 Check Assembly 1
2 Seal Ring for #2 Check Assembly 1
3 O-Ring for Ball Valve 2
4 O-Ring for Sleeve 1
5 O-Ring for #1 Seat 1
6 O-Ring for #2 Seat 1
7 Lubricant 1

Zurn Wilkins - 350LXL Series - Backflow Preventer - Device Only

Medium Hazard, High-Performance, Low Head Loss Backflow Preventer

Product Code Size Description
350LXL020 20mm Medium Hazard, Double Check Backflow Preventer - Model 350 - Threaded Male BSPT
350LXL025 25mm Medium Hazard, Double Check Backflow Preventer - Model 350 - Threaded Male BSPT
350LXL032 32mm Medium Hazard, Double Check Backflow Preventer - Model 350 - Threaded Male BSPT
350LXL040 40mm Medium Hazard, Double Check Backflow Preventer - Model 350 - Threaded Male BSPT
350LXL050 50mm Medium Hazard, Double Check Backflow Preventer - Model 350 - Threaded Male BSPT

Note: Strainer and Valves are supplied loose.

Product Code Size Description
350LXL020+S 20mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer - Threaded BSPT
350LXL025+S 25mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer - Threaded BSPT
350LXL032+S 32mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer - Threaded BSPT
350LXL040+S 40mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer - Threaded BSPT
350LXL050+S 50mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer - Threaded BSPT

Note: Strainer and Valves are supplied loose.

Product Code Size Description
350LXL020+SV 20mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer + Ball Valves - Threaded BSPT
350LXL025+SV 25mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer + Ball Valves - Threaded BSPT
350LXL032+SV 32mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer + Ball Valves - Threaded BSPT
350LXL040+SV 40mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer + Ball Valves - Threaded BSPT
350LXL050+SV 50mm Medium Hazard, Double Check Backflow Preventer - Model 350 + Y Strainer + Ball Valves - Threaded BSPT



Additional Accessories

Bronze Body, Stainless Screen, Y Type Design, BSP Threaded Female.

Product Code Size Description
YSBR020 20mm 20 Mesh Line Strainer, BSP Threaded Female
YSBR025 25mm 20 Mesh Line Strainer, BSP Threaded Female
YSBR032 32mm 20 Mesh Line Strainer, BSP Threaded Female
YSBR040 40mm 20 Mesh Line Strainer, BSP Threaded Female
YSBR050 50mm 20 Mesh Line Strainer, BSP Threaded Female

Full Flow, Brass Body, Polyurethane coated stainless steel long handle.

Product Code Size Description
020MF 20mm Isolating Ball Valve - Male / Female - BSP Threaded
020FF 20mm Isolating Ball Valve - Female / Female - BSP Threaded
025MF 25mm Isolating Ball Valve - Male / Female - BSP Threaded
025FF 25mm Isolating Ball Valve - Female / Female - BSP Threaded
032MF 32mm Isolating Ball Valve - Male / Female - BSP Threaded
032FF 32mm Isolating Ball Valve - Female / Female - BSP Threaded
040MF 40mm Isolating Ball Valve - Male / Female - BSP Threaded
040FF 40mm Isolating Ball Valve - Female / Female - BSP Threaded
050MF 50mm Isolating Ball Valve - Male / Female - BSP Threaded
050FF 50mm Isolating Ball Valve - Female / Female - BSP Threaded

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