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Watts 3/4 LF800M4-FR Lead-Free Pressure Vacuum Breaker, FNPT x FNPT, 33°F-140°F - Lead-Free Pressure Vacuum Breakers
WattsLead-Free Pressure Vacuum Breakers

Watts 3/4 LF800M4-FR Lead-Free Pressure Vacuum Breaker, FNPT x FNPT, 33°F-140°F

The WATTS 3/4 LF800M4-FR is a lead-free pressure vacuum breaker designed for water media in high health hazard applications. It features FNPT x FNPT connections and operates within a temperature range of 33°F to 140°F.

SKU 3G-OTH-446149

Also listed as: 34LF800M4FR · 3 4 LF800M4 FR · 3-4-LF800M4-FR

Brand
Watts
Item
3/4 LF800M4-FR Lead-Free Pressure Vacuum Breaker, FNPT x FNPT, 33°F-140°F
Part Number
3/4 LF800M4-FR
Category
Lead-Free Pressure Vacuum Breakers
Available to Order
Also known as:3/4 LF800M4-FRWatts
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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
3/4 LF800M4-FR
Type
FNPT x FNPT, For Water Media, 33°F – 140°F, High Health Hazard
Connection Type
FNPT x FNPT

Technical Documents

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

Product Description

The WATTS 3/4 LF800M4-FR is a lead-free pressure vacuum breaker designed for water media in high health hazard applications. It features FNPT x FNPT connections and operates within a temperature range of 33°F to 140°F.

Frequently Asked Questions

What is a WATTS 3/4 LF800M4-FR vacuum breaker used for?

The WATTS 3/4 LF800M4-FR is a lead-free pressure vacuum breaker used to prevent backflow of contaminated water in high health hazard applications. It is installed on water lines to protect potable water supplies from cross-connections, commonly in commercial and industrial plumbing systems.

What are the specifications of the WATTS LF800M4-FR?

The WATTS LF800M4-FR has FNPT x FNPT connections, is rated for water media, and operates from 33°F to 140°F. It is designed for high health hazard applications and is lead-free. The manufacturer part number is 3/4 LF800M4-FR.

Where to buy a WATTS LF800M4-FR vacuum breaker worldwide?

3G Electric supplies the WATTS LF800M4-FR vacuum breaker to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this lead-free pressure vacuum breaker for high health hazard applications.

How to install a WATTS pressure vacuum breaker?

Install the WATTS pressure vacuum breaker vertically with the inlet and outlet connected via FNPT fittings. Ensure it is at least 12 inches above the highest downstream outlet. Follow local plumbing codes and the manufacturer's instructions for proper backflow prevention in high health hazard systems.

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
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Watts Products

3G Electric supplies Watts lead-free pressure vacuum breakers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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