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Watts Vacuum Breaker: 1 1/2 LF800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F - Lead-Free Pressure Vacuum Breakers
WattsLead-Free Pressure Vacuum Breakers

Watts Vacuum Breaker: 1 1/2 LF800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F

The WATTS 1 1/2 LF800M4-QT is a lead-free pressure vacuum breaker designed for back-siphonage prevention in water media. This unit features FNPT x FNPT connections and is rated for operating temperatures from 33°F to…

SKU 3G-OTH-446168

Brand
Watts
Item
Vacuum Breaker: 1 1/2 LF800M4-QT, FNPT x FNPT, For Water Media, 33°F – 140°F
Category
Lead-Free Pressure Vacuum Breakers
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Technical Specifications

Watts
Manufacturer Part Number
1-1/2 LF800M4-QT
Type
FNPT x FNPT, For Water Media, 33°F – 140°F, Back-Siphonage
Connection Type
FNPT x FNPT
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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS 1 1/2 LF800M4-QT is a lead-free pressure vacuum breaker designed for back-siphonage prevention in water media. This 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 1 1/2 LF800M4-QT vacuum breaker used for?

The WATTS 1 1/2 LF800M4-QT is a lead-free pressure vacuum breaker used for back-siphonage prevention in water systems. It is commonly installed on irrigation, commercial, and industrial water lines to protect potable water supplies from contamination due to backflow.

What are the specifications of the WATTS LF800M4-QT?

The WATTS LF800M4-QT has FNPT x FNPT connections, a 1 1/2-inch size, and is rated for water media from 33°F to 140°F. It is a lead-free pressure vacuum breaker designed for back-siphonage prevention. The manufacturer part number is 1-1/2 LF800M4-QT.

Where to buy the WATTS LF800M4-QT worldwide?

You can source the WATTS LF800M4-QT through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this lead-free pressure vacuum breaker.

How to install a WATTS pressure vacuum breaker?

Install the WATTS pressure vacuum breaker in an accessible, vertical position above the highest downstream outlet. Ensure the FNPT connections are properly sealed with thread tape. Follow local plumbing codes and the manufacturer's instructions for back-siphonage prevention devices to ensure correct operation.

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 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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