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

3G Electric
RFQ CartGet a QuoteSign inSign up
Watts Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media - Pressure Vacuum Breakers
WattsPressure Vacuum Breakers

Watts Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media

The WATTS 800M4-FR is a freeze-resistant pressure vacuum breaker designed for water media. This bronze unit features FNPT x FNPT connections and operates within a temperature range of 33°F to 140°F.

SKU 3G-OTH-430697

Brand
Watts
Item
Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media
Category
Pressure Vacuum Breakers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
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

Technical Specifications

Watts
Manufacturer Part Number
800M4-FR
Type
FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze
Connection Type
FNPT x FNPT
View Full Spec Sheet

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 freeze-resistant pressure vacuum breaker designed for water media. This bronze unit features FNPT x FNPT connections and operates within a temperature range of 33°F to 140°F.

Frequently Asked Questions

What is the WATTS 800M4-FR freeze resistant vacuum breaker used for?

The WATTS 800M4-FR is a pressure vacuum breaker designed to prevent backflow in water systems while resisting freeze damage. It is commonly installed on outdoor irrigation or commercial water lines where temperatures drop, protecting potable water supplies from contamination.

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

The WATTS 800M4-FR has FNPT x FNPT connections, is made of bronze, and operates in water media from 33°F to 140°F. It is a freeze-resistant pressure vacuum breaker, model 800M4-FR, suitable for cold-weather backflow prevention applications.

Where to buy the WATTS 800M4-FR worldwide?

3G Electric supplies the WATTS 800M4-FR freeze resistant vacuum breaker to customers worldwide. We handle full logistics, customs clearance, and delivery, ensuring you receive the correct bronze FNPT x FNPT backflow preventer for your water system requirements.

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

Install the WATTS 800M4-FR in a vertical position above the highest downstream outlet, with the FNPT connections properly sealed. Ensure the unit is protected from freezing by its design, but follow local plumbing codes and manufacturer guidelines for safe backflow prevention.

Used in

Common applications for Watts
Industrial burner gas safety systems — Watts HF2000 filters with GF-series seal kits maintain clean, regulated gas supply to burner pilot and main flame controls
Commercial heating and boiler installations — Modular filter assemblies support preventive maintenance and component replacement without full system shutdown
Process gas delivery pipelines — DN25 through DN125 filter bodies accommodate varying flow rates and inlet pressures across manufacturing and chemical processes
Gas pressure regulation benches — Multi-stage Watts filter platforms integrate with pressure reducers and safety shutoff valves in test and calibration environments
Equipment retrofit and upgrade projects — Available connection sizes and seal kits enable adaptation of newer Watts components into legacy gas control systems
Planned maintenance and spare-parts inventory — Filter seal kits allow facilities to stock consumables in advance, reducing downtime during scheduled gas system servicing

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 →

Similar products

Matched by specification & description
WATTS Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Dual Check Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze, NPT. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Dual Check Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze, NPT. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Pressure Vacuum Breaker: 2" LF800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Pressure Vacuum Breaker: 2" LF800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Vacuum Breaker: 3/4 LF800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Vacuum Breaker: 3/4 LF800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Vacuum Breaker: 1 LF800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Vacuum Breaker: 1 LF800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.

More from Watts

View all Watts parts →
WATTS Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Vacuum Breaker: 1/2 800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Vacuum Breaker: 1/2 800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Vacuum Breaker: 1 1/2 800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard (MPN 1-1/2 800M4-QT). Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Vacuum Breaker: 1 1/2 800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard (MPN 1-1/2 800M4-QT). Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Freeze Resistant Vacuum Breaker: 800M4-FR, FNPT x FNPT, For Water Media, 33°F – 140°F, Bronze. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Vacuum Breaker: 2 800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Vacuum Breaker: 2 800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Anti-Siphon Backflow Preventer: 3/4 800M4-QT-FZ, FNPT x FNPT, For Water Media, 33°F – 140°F. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Anti-Siphon Backflow Preventer: 3/4 800M4-QT-FZ, FNPT x FNPT, For Water Media, 33°F – 140°F. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
WATTS Anti-Siphon Pressure Vacuum Breaker: 1 800M4-QT-FZ, FNPT x FNPT, For Water Media, 33°F – 140°F. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.
Watts
WATTS Anti-Siphon Pressure Vacuum Breaker: 1 800M4-QT-FZ, FNPT x FNPT, For Water Media, 33°F – 140°F. Key specifications — Brand: WATTS; Connection Type: FNPT x FNPT.