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Watts 3/4 LF800M4-QT-FZ Lead-Free Pressure Vacuum Breaker, FNPT x FNPT - Lead-Free Pressure Vacuum Breakers
WattsLead-Free Pressure Vacuum Breakers

Watts 3/4 LF800M4-QT-FZ Lead-Free Pressure Vacuum Breaker, FNPT x FNPT

The WATTS Anti-Siphon Backflow Preventer, model 3/4 LF800M4-QT-FZ, is a lead-free pressure vacuum breaker designed for water media. It features FNPT x FNPT connections and operates within a temperature range of 33°F…

SKU 3G-OTH-446150

Also listed as: 34LF800M4QTFZ · 3 4 LF800M4 QT FZ · 3-4-LF800M4-QT-FZ

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

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3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS Anti-Siphon Backflow Preventer, model 3/4 LF800M4-QT-FZ, is a lead-free pressure vacuum breaker designed for water media. It features FNPT x FNPT connections and operates within a temperature range of 33°F to 140°F.

Frequently Asked Questions

What is the WATTS 3/4 LF800M4-QT-FZ anti-siphon backflow preventer used for?

The WATTS 3/4 LF800M4-QT-FZ is a lead-free pressure vacuum breaker that prevents backflow of contaminated water into potable water lines. It is used in commercial and residential irrigation, industrial process water, and plumbing systems where anti-siphon protection is required.

What are the specifications of the WATTS LF800M4-QT-FZ backflow preventer?

The WATTS LF800M4-QT-FZ is a 3/4-inch lead-free pressure vacuum breaker with FNPT x FNPT connections. It is rated for water media and operates within a temperature range of 33°F to 140°F. The manufacturer part number is 3/4 LF800M4-QT-FZ.

Where to buy the WATTS LF800M4-QT-FZ backflow preventer worldwide?

3G Electric supplies the WATTS LF800M4-QT-FZ backflow preventer to customers worldwide. As a global industrial solutions provider, 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.

How to install a WATTS pressure vacuum breaker like the LF800M4-QT-FZ?

Install the WATTS LF800M4-QT-FZ in an accessible location at least 12 inches above the highest downstream outlet. Ensure FNPT connections are properly sealed with thread tape. Follow local plumbing codes and the manufacturer's instructions for orientation and testing 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
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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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