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Zurn Wilkins - 375LXL Series - Backflow Preventer 20-25mm

Deeco - Zurn Wilkins - 375LXL_ 20-25mm - Product Image
Brand: Zurn Wilkins
Category: Backflow Prevention, 375 Series
Size Range:

20-25mm

Other Sizes:

32-50mm

65-250mm

Connection:

Threaded Male BSPT

Product Description

The Zurn Wilkins 375 Series Backflow Preventer is a High 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. This is also AS/NZS listed.


Typical Application

Designed for installation on potable water lines to protect against both back siphonage and backpressure of contaminated water into the potable water supply. Reduced Pressure Zone Device Assembly shall provide protection where a potential health hazard exists. (High Hazard)

Standards 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, Nylon

Springs: Stainless steel, 300 series

Tailpieces: Cast Bronze, Lead-Free

Struts: Stainless steel, 300 series

End connections: Threaded Male BSPT

Test connections: 1/4" SAE 45° Flare

Flow Characteristics

Model 375 20 & 25mm (STANDARD & METRIC)

Zurn Wilkins - 375LXL20-25mm - Flow characteristics

Zurn Wilkins - 375LXL20-25mm - Flow characteristics

Relief Valve Discharge Rates

Zurn Wilkins - 375LXL20-25mm - Relief Valve Discharge Rates

Zurn Wilkins - 375LXL20-25mm - Relief Valve Discharge Rates

Technical Specifications

The Reduced Pressure Principle Backflow Preventer shall be Australian WaterMark Certified (AS/NZS 2845.1), rated to 82°C and supplied male pipe thread tailpieces. The main body shall be Nylon and the seat disc elastomers shall be silicone. The Reduced Pressure Principle Backflow Preventer shall be a Zurn Wilkins Model 375.

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. Unless otherwise specified, the assembly shall be mounted at a minimum of 12” (305mm) and a maximum of 30” (762mm) above adequate drains with sufficient side clearance for testing and maintenance. The installation shall be made so that no part of the unit can be submerged.

Zurn Wilkins - 375LXL20-25mm - Typical Installation

Zurn Wilkins - 375LXL20-25mm - Typical Installation

Dimensions and Weights

Zurn Wilkins - 375LXL20-25mm - Diagram
Zurn Wilkins - 375LXL20-25mm - Dimensions and Weights

Zurn Wilkins - 375LXL20-25mm - Dimensions and Weights

Zurn Wilkins - 375 LXL Series - Backflow Preventer - Repair Kits

Product Code Size Description
RK34-375 20mm Model 375LXL - Check/Relief Module Set - Complete Kit
RK1-375 25mm Model 375LXL - Check/Relief Module Set - Complete Kit
RK114-375 32-50mm Model 375LXL - Check/Relief Module Set - Complete Kit
RK114-375R 32-50mm Model 375LXL - Repair Kit - Rubber Only
RK - 34 - Image - Spare Parts
Pos. Description Qty
1 O-Ring - Housing Outlet 1
2 O-Ring - Sleeve 1
3 O-Ring - Relief Valve Cover 1
4 O-Ring -Relief Valve Stem 1
5 O-Ring - Housing Inlet 1
6 O - Ring - Relief Valve seat (7) 1
7 Relief Valve Seat 1
8 #2 Check Assembly 1
9 #1 Check Assembly 1
10 Relief Valve Stem Assembly 1
11 Lubricant 1
12 Relief Valve Spring 1
RK1-375R - How to Order Image
Pos. Description Qty
1 #1 Check Assembly 1
2 #2 Check Assembly 1
3 Relief Valve Stem Assembly 1
4 O-Ring - Sleeve 1
5 O-Ring - Housing Inlet 1
6 O-Ring Housing Outelt 1
7 O-Ring - Relief Valve Seat(10) 1
8 O-Ring - Relief Valve Stem 1
9 O-Ring - Relief valve cover 1
10 Relief Valve Seat 1
11 Relief Valve Spring 1
RK114-375 - How to Order Image
Pos. Decsription Qty
1 Check Assembly #1 1
2 Check Assembly #2 1
3 Diaphragm + Plunger for Relief Valve 1
4 O-Rings for Ball Valve 2
5 O-Ring for Relief Valve 1
6 O-Ring for Sleeve #1 Seat 1
7 O-Ring for Relief Valve Cover 1
8 Seal Washer for Relief Valve 1
9 Seal Retainer for Relief Valve 1
10 O-Ring for Plunger 1
11 O-Rings for Sensing Ports 2
RK114-375R - How to Order Image
Pos. Description Qty
1 Diaphragm 1
2 O-Ring for Relief Valve Cover 1
3 O-Ring for Relief Valve 1
4 O-Ring for #2 Seat 1
5 O-Ring for Sleeve 1
6 O-Ring for #1 Seat 1
7 O-Ring for Ball Valve 1
8 O-Ring for Ball Valve 1
9 Check Seal Ring 1
10 Check Seal Ring 1
11 Seal Washer for Relief Valve 1
12 O-Ring for Plunger 1
13 O-Rings for Sensing Port 1

Zurn Wilkins - 375LXL Series - Backflow Preventer - Device Only

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

Zurn Wilkins - 365LXL020-025mm - Image
Product Code Size Description
375LXL020 20mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 - Threaded Male BSPT
375LXL025 25mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 - Threaded Male BSPT
375LXL032 32mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 - Threaded Male BSPT
375LXL040 40mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 - Threaded Male BSPT
375LXL050 50mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 - Threaded Male BSPT

Note: Strainer and Valves are supplied loose.

Zurn Wilkins - 375L020+S
Product Code Size Description
375LXL020+S 20mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer - Threaded BSPT
375LXL025+S 25mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer - Threaded BSPT
375LXL032+S 32mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer - Threaded BSPT
375LXL040+S 40mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer - Threaded BSPT
375LXL050+S 50mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer - Threaded BSPT

Note: Strainer and Valves are supplied loose.

Zurn Wilkins - 375L020+SV
Product Code Size Description
375LXL020+SV 20mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer + Ball Valves - Threaded BSPT
375LXL025+SV 25mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer + Ball Valves - Threaded BSPT
375LXL032+SV 32mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer + Ball Valves - Threaded BSPT
375LXL040+SV 40mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer + Ball Valves - Threaded BSPT
375LXL050+SV 50mm High Hazard, Reduced Pressure Zone Backflow Preventer - Model 375 + Y Strainer + Ball Valves - Threaded BSPT



Additional Accessories

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

YSBR040
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.

Isolating Ball Valves - Image
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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