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 800M4-FR Dual Check Vacuum Breaker, Bronze, FNPT x FNPT - Pressure Vacuum Breakers
WattsPressure Vacuum Breakers

Watts 800M4-FR Dual Check Vacuum Breaker, Bronze, FNPT x FNPT

The WATTS 800M4-FR is a dual check vacuum breaker, a type of pressure vacuum breaker designed for water media. This bronze unit features FNPT x FNPT connections and is rated for operating temperatures from 33°F to 140°F.

SKU 3G-OTH-430705

Also listed as: 800M4FR · 800M4 FR

Brand
Watts
Item
800M4-FR Dual Check Vacuum Breaker, Bronze, FNPT x FNPT
Part Number
800M4-FR
Category
Pressure Vacuum Breakers
Available to Order
Also known as:800M4-FRWatts
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
800M4-FR
Type
FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze, NPT
Connection Type
FNPT x FNPT

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 800M4-FR is a dual check vacuum breaker, a type of pressure vacuum breaker designed for water media. This bronze unit features FNPT x FNPT connections and is rated for operating temperatures from 33°F to 140°F.

Frequently Asked Questions

What is the WATTS 800M4-FR dual check vacuum breaker used for?

The WATTS 800M4-FR is a pressure vacuum breaker used to prevent backflow in water systems. It protects potable water supplies by venting air and stopping reverse flow, commonly installed in commercial or industrial irrigation and plumbing applications.

What are the specifications of the WATTS 800M4-FR?

The WATTS 800M4-FR is a bronze dual check vacuum breaker with FNPT x FNPT connections. It is rated for water media and operating temperatures from 33°F to 140°F. The manufacturer part number is 800M4-FR.

Where to buy the WATTS 800M4-FR worldwide?

3G Electric supplies the WATTS 800M4-FR dual check vacuum breaker worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install the WATTS 800M4-FR vacuum breaker?

Install the WATTS 800M4-FR in a vertical position with the vent facing downward. Ensure FNPT connections are properly sealed with thread tape. Follow local plumbing codes and the manufacturer's instructions for correct orientation and clearance to maintain backflow protection.

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 pressure vacuum breakers. 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

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first