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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 - 375LXL Series - Backflow Preventer 20-25mm - Device Only

Zurn Wilkins - 365LXL020-025mm - Image
Product Code Size Description
375LXL020 20mm Zurn Wilkins - Model 375 - 20mm - Threaded Male BSP
375LXL025 25mm Zurn Wilkins - Model 375 - 25mm - Threaded Male BSP
375LXL032 32mm Zurn Wilkins - Model 375 - 32mm - Threaded Male BSP
375LXL040 40mm Zurn Wilkins - Model 375 - 40mm - Threaded Male BSP
375LXL050 50mm Zurn Wilkins - Model 375 - 50mm - Threaded Male BSP
Product Code Size Description
375LXL020+S 20mm Zurn Wilkins - Model 375 with Y Strainer - 20mm - Threaded Male / Female BSP
375LXL025+S 25mm Zurn Wilkins - Model 375 with Y strainer - 25mm - Threaded Male / Female BSP
375LXL032+S 32mm Zurn Wilkins - Model 375 with Y strainer - 32mm - Threaded Male / Female BSP
375LXL040+S 40mm Zurn Wilkins - Model 375 with Y strainer - 40mm - Threaded Male / Female BSP
375LXL050+S 50mm Zurn Wilkins - Model 375 with Y strainer - 50mm - Threaded Male / Female BSP
Product Code Size Description
375LXL020+SV 20mm Zurn Wilkins - Model 375 with Y Strainer & Ball Valves - 20mm - Threaded Female / Female BSP
375LXL025+SV 25mm Zurn Wilkins - Model 375 with Y strainer & Ball Valves - 25mm - Threaded Female / Female BSP
375LXL032+SV 32mm Zurn Wilkins - Model 375 with Y strainer & Ball Valves - 32mm - Threaded Female / Female BSP
375LXL040+SV 40mm Zurn Wilkins - Model 375 with Y strainer & Ball Valves - 40mm - Threaded Female / Female BSP
375LXL050+SV 50mm Zurn Wilkins - Model 375 with Y strainer & Ball Valves - 50mm - Threaded Female / Female BSP



Additional Accessories

YSBR040
Product Code Size Description
YSBR015 15mm 20 Mesh Line Strainer Female BSP - 15mm
YSBR020 20mm 20 Mesh Line Strainer Female BSP - 20mm
YSBR025 25mm 20 Mesh Line Strainer Female BSP - 25mm
YSBR032 32mm 20 Mesh Line Strainer Female BSP - 32mm
YSBR040 40mm 20 Mesh Line Strainer Female BSP - 40mm
YSBR050 50mm 20 Mesh Line Strainer Female BSP - 50mm
Isolating Ball Valves - Image
Product Code Size Description
015MF 15mm Ball Valve - Threaded Male / Female BSP - 15mm
020MF 20mm Ball Valve - Threaded Male / Female BSP - 20mm
020FF 20mm Ball Valve - Threaded Female / Female BSP - 20mm
025MF 25mm Ball Valve - Threaded Male / Female BSP - 25mm
025FF 25mm Ball Valve - Threaded Female / Female BSP - 25mm
032MF 32mm Ball Valve - Threaded Male / Female BSP - 32mm
032FF 32mm Ball Valve - Threaded Female / Female BSP - 32mm
040MF 40mm Ball Valve - Threaded Male / Female BSP - 40mm
040FF 40mm Ball Valve - Threaded Female / Female BSP - 40mm
050MF 50mm Ball Valve - Threaded Male / Female BSP - 50mm
050FF 50mm Ball Valve - Threaded Female / Female BSP - 50mm



Spare Parts / Repair Kits

Product Code Size Description
RK34-375 20mm Model 375 - Check/Relief Module Set - Complete Kit
RK34-375R 20mm Model 375 - Check/Relief Module Set - Rubber Only Kit
RK1-375 25mm Model 375 - Check/Relief Module Set - Complete Kit
RK1-375R 25mm Model 375 - Check/Relief Module Set - Rubber Only Kit
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
RK34-375R - How to Order Image
Pos. Description Qty
1 O-Ring - Housing Inlet 1
2 O-Ring - #1 check Valve 1
3 Diaphragm 1
4 Check Seal Rings 2
5 Relief Valve Seal Ring 1
6 O-Ring Relief Valve Cover 1
7 O-Ring - Relief Valve Seat 1
8 O-Ring - Relief Valve Stem 1
9 O-Ring - Housing Outlet 1
10 O-Ring - Sleeve 1
11 O-Ring - #2 Check Valve 1
12 Lubricant 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
RK1-375R - Image - Steps
Pos. Description Qty
1 O-Ring - Housing Inlet 1
2 O-Ring - #1 Check Seat 1
3 O-Ring - #2 Check Seat 1
4 O-Ring - Housing Outlet 1
5 O-Ring - Sleeve 1
6 O-Ring - Relief Valve Seat 1
7 O-Ring - Relief Valve Stem 1
8 O-Ring - Relief Valve Cover 1
9 Check Seal Rings 2
10 Relief valve seal Ring 1
11 Diaphragm 1
Contact Form