Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
Watts 957-OSY3 Reduced Pressure Zone Backflow Preventer with - Watts RPZ Backflow Preventers
WattsWatts RPZ Backflow Preventers

Watts 957-OSY3 Reduced Pressure Zone Backflow Preventer with

The Watts 957 Reduced Pressure Zone Backflow Preventer (MPN 957-OSY3) is a flange-connected RPZ backflow preventer with a 3-inch pipe size. It features an OSY gate valve shut-off valve type and includes a flood…

SKU 3G-OTH-444405

Also listed as: 957OSY3 · 957 OSY3

Brand
Watts
Item
957-OSY3 Reduced Pressure Zone Backflow Preventer with
Part Number
957-OSY3
Category
Watts RPZ Backflow Preventers
Available to Order
Also known as:957-OSY3Watts
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Watts
Manufacturer Part Number
957-OSY3
Type
with Flood Detection Sensor
Pipe Size
3 in
Connection Type
Flange
Shut-Off Valve Type
OSY Gate Valve

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Watts 957 Reduced Pressure Zone Backflow Preventer (MPN 957-OSY3) is a flange-connected RPZ backflow preventer with a 3-inch pipe size. It features an OSY gate valve shut-off valve type and includes a flood detection sensor.

Frequently Asked Questions

What is the Watts 957 RPZ backflow preventer used for?

The Watts 957 reduced pressure zone backflow preventer protects potable water supplies from cross-connection contamination in commercial and industrial systems. Its flood detection sensor alerts to leakage, making it suitable for high-hazard applications where backflow prevention is critical.

What are the specifications of the Watts 957-OSY3 backflow preventer?

The Watts 957-OSY3 is a 3-inch flange-connected RPZ backflow preventer with an OSY gate valve shut-off and an integrated flood detection sensor. It is designed for high-hazard cross-connection control and is supplied by 3G Electric as part of their industrial flow-control offering.

Where to buy the Watts 957-OSY3 backflow preventer worldwide?

3G Electric supplies the Watts 957-OSY3 reduced pressure zone backflow preventer to customers worldwide. We handle full logistics, customs clearance, and delivery coordination, ensuring the correct flange-connected RPZ with flood detection sensor reaches your industrial facility.

How to install a Watts 957 RPZ backflow preventer?

Install the Watts 957 RPZ backflow preventer in a horizontal position with adequate clearance for testing and maintenance. Ensure the flood detection sensor is positioned to detect leakage. Follow local plumbing codes and the manufacturer's instructions for flange connections and OSY gate valve operation.

Used in

Common applications for Watts
Commercial plumbing – Watts standard capacity water pressure regulators (3/8 LF 26AB) for stabilizing incoming water pressure
Industrial steam systems – Watts 152A series steam pressure regulators for pressure reduction in process and heating lines
Cross-connection control – Watts 757 double check backflow preventers for commercial and industrial water supply protection
Boiler safety – Watts ASME Section XIII temperature and pressure relief valves for overpressure protection in heating systems
Hydronic heating – Watts CP16 pilot-operated pressure regulators for maintaining consistent pressure in steam or water loops
Water hammer mitigation – Watts LF15M2-A water hammer arrestors for absorbing surges in quick-closing valve applications
Not sure this is the right part? Photo-identify it

Watts Products

3G Electric supplies Watts watts rpz backflow preventers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from Watts

View all Watts parts
Reduced pressure zone backflow preventer for high-hazard applications, featuring a flood detection sensor. Flanged connections with 2 1/2 in pipe size and outside screw and yoke (OSY) gate valve shut-off. Used in commercial and industrial water systems to prevent backflow from back-siphonage or back-pressure
Watts
Reduced pressure zone backflow preventer for high-hazard applications, featuring a flood detection sensor. Flanged connections with 2 1/2 in pipe size and outside screw and yoke (OSY) gate valve shut-off. Used in commercial and industrial water systems to prevent backflow from back-siphonage or back-pressure
This Watts reduced pressure zone backflow preventer features a bronze body, 1/2 in FNPT connections, an integral strainer, and a ball valve shut-off. It is designed to protect potable water supplies from cross-connection contamination in commercial and industrial plumbing systems, operating within a temperature range of 33°F to 180°F
Watts
This Watts reduced pressure zone backflow preventer features a bronze body, 1/2 in FNPT connections, an integral strainer, and a ball valve shut-off. It is designed to protect potable water supplies from cross-connection contamination in commercial and industrial plumbing systems, operating within a temperature range of 33°F to 180°F

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first