Lead-Free Brass 3/4 in Anti-Siphon Vacuum Breaker Backflow Preventer

Our review of the Watts LF288A 3/4 in Lead-Free Brass Anti-Siphon Vacuum Breaker finds it best suited for technicians and labs that need a compact, reliable device to stop contaminated water from re-entering the potable supply. The single biggest reason to buy is its focused protection: a full-sized orifice combined with an atmospheric vent and chemical-resistant silicone seat disc gives a dependable seal and effective anti-siphon performance in low-flow, non-continuous hot or cold water applications.

Key Features

• Backflow prevention: Prevents reverse flow of polluted water into the potable supply, protecting fixtures and processes that handle health hazard fluids.
• Lead-free brass body: Durable construction made for long-term service in both hot and cold water systems without lead contamination concerns.
• Female NPT connections: 3/4 in female NPT inlet and outlet allow straightforward installation into standard plumbing runs.
• Chemical-resistant seat: Silicone disc seat resists deterioration from common lab chemicals and maintains a tight seal over time.
• Full-sized orifice: Designed to match pipe capacity so the unit does not unduly restrict flow for the intended low-flow applications.
• Atmospheric vent and chrome hood: Venting prevents spilling while the chromed hood provides a clean, serviceable appearance.

Who It's For

This vacuum breaker is aimed at contractors, laboratory managers, and facility maintenance staff who need a compact backflow prevention solution for low-flow, intermittent hot or cold water connections. It works well where health-hazard protection is required but space and flow demands are modest.

Those needing high-flow commercial systems, continuous-duty industrial backflow assemblies, or a device rated for high pressure differential should look for larger certified assemblies; the LF288A is optimized for low-flow, non-continuous uses rather than heavy municipal or irrigation service.

Pros & Cons

Pros

• Lead-free brass construction offers long service life and corrosion resistance in mixed temperature applications.
• Chemical-resistant silicone seat delivers reliable sealing against leaks and chemical attack common in lab settings.
• Simple female NPT connections and full-sized orifice make installation straightforward and maintain expected flow capacity.

Cons

• Designed for low-flow, non-continuous use only, so it is not suitable for high-flow or continuous commercial applications.

Specifications

Model	LF288A Series
Size	3/4 in
Body material	Lead-free brass
Connections	Female NPT inlet and outlet
Seat material	Chemical-resistant silicone disc
Application	Low-flow, non-continuous hot or cold water health hazard use
Hood	Chrome

Our Verdict

The LF288A backflow preventer is a practical choice for labs and smaller installations that require reliable anti-siphon protection without overspecifying equipment. Its lead-free brass construction, silicone seat, and full-sized orifice deliver durable, leak-resistant performance for low-flow, intermittent use, making it good value for facilities focused on potable water safety.

Frequently Asked Questions

Can this unit be used on hot water?
Yes. The device is designed for both hot and cold water in low-flow, non-continuous applications.

What connection type does it use?
It has 3/4 in female NPT inlet and outlet connections for straightforward plumbing installation.

Is this suitable for continuous high-flow service?
No. This model is intended for low-flow, intermittent use and is not recommended for continuous high-flow or heavy commercial service.