WATTS MEA469-90M Anti Siphon Vacuum Breaker ASSE-1001 N388 3/8 180 125PSI

( Brand: Watts ), ( Manufacturer Part Number: MEA469-90M ), ( Part Type: Vacuum Breaker ), ( Maximum Pressure: 125 Psi )

Review WATTS Anti siphon Vacuum Breaker 3/8 Inch 180 125psi

The **Watts ME469-90M ASSE-1001 Anti-Siphon Vacuum Breaker** is a high-performance, NSF/ANSI Standard 61-certified backflow prevention device designed to safeguard potable water systems from contamination while maintaining optimal flow efficiency. This **3/8-inch brass vacuum breaker** features a robust **180-degree swing check valve mechanism**, ensuring reliable operation even under fluctuating water pressures. Engineered with a **125 PSI working pressure rating**, it excels in both residential and light commercial applications where water supply lines are susceptible to backflow hazards, such as irrigation systems, sprinklers, or outdoor faucets. The **ASSE-1001 certification** guarantees strict adherence to industry safety standards, preventing cross-contamination by automatically sealing off the water supply when pressure drops, thus eliminating the risk of siphoning or backflow. Constructed from durable **brass with a nickel-plated finish**, this vacuum breaker resists corrosion and withstands the elements, making it ideal for both indoor and outdoor installations. Its compact yet sturdy design ensures easy integration into existing plumbing systems, while the **anti-siphon feature** provides an extra layer of protection against vacuum-induced backflow. Whether installed on a garden hose bib, irrigation line, or other vulnerable water outlets, this device delivers peace of mind with its dependable performance and long-term reliability.

### **Pros and Cons of buying a Watts ME469-90M ASSE-1001 Anti-Siphon Vacuum Breaker (N388, 3/8", 125 PSI)**

1. **Prevents Backflow and Contamination** This is a **Listed ASSE-1001** vacuum breaker, meaning it meets strict plumbing codes to prevent backflow, which could otherwise contaminate your drinking water with pollutants, sewage, or chemicals.

2. **Anti-Siphon Design** The "ASSE-1001" certification ensures it resists siphoning, a common issue in sprinkler systems or outdoor hoses where water could be drawn back into the supply line.

3. **High-Pressure Rating (125 PSI)** Suitable for most residential and light commercial water systems, making it durable for standard plumbing pressures.

4. **Standardized Size (3/8")** Compatible with common garden hose connections, ensuring easy installation without needing special adapters.

5. **Reliable Brand (Watts)** Watts is a well-known manufacturer in plumbing and irrigation, offering products with a reputation for quality and durability.

6. **Easy Installation** Designed for straightforward mounting on hose bibs or sprinkler systems, reducing the need for complex plumbing adjustments.

7. **Code-Compliant** Meets **NSF/ANSI Standard 61** and **ASSE-1001** requirements, ensuring it can be legally installed in most jurisdictions without additional permits.

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1. **Limited to Specific Applications** Primarily intended for **outdoor hose bibs, sprinkler systems, or irrigation**, not for indoor plumbing or high-flow industrial use.

2. **Not a Full Backflow Preventer** While it prevents siphoning, it does **not** fully replace a **double-check valve assembly** (DCVA) or **reduced-pressure zone (RPZ) device** in high-risk areas (e.g., commercial properties, swimming pools with chemical backwash).

3. **Potential for Clogging** Like all vacuum breakers, debris (sediment, rust, or small particles) can accumulate inside, requiring occasional cleaning or replacement.

4. **Replacement Cost Over Time** If exposed to harsh weather (freezing temperatures, UV degradation), the rubber seals or plastic components may degrade, necessitating eventual replacement.

5. **Installation Restrictions** Must be installed **above the flood level rim** of the highest fixture it serves (e.g., a hose bib must be higher than the sprinkler heads it protects).

6. **No Built-in Pressure Regulator** If your water pressure exceeds safe levels for connected hoses or sprinklers, additional pressure-reducing valves may still be needed.

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The **Watts ME469-90M ASSE-1001 Anti-Siphon Vacuum Breaker** is a **practical and code-compliant solution** for preventing backflow in outdoor hose bibs and sprinkler systems. It is **reliable for residential use** where siphoning is a concern, particularly in areas with seasonal watering or frost risks. However, it is **not a universal backflow preventer** and should not be used in place of more robust systems (like RPZ devices) in high-risk commercial or industrial settings.

If your primary need is **protecting a garden hose or sprinkler system from contamination**, this vacuum breaker is a **solid, cost-effective choice**. If you require **full backflow protection for a pool, commercial irrigation, or high-pressure systems**, consider pairing it with additional devices or consulting a plumber for a more comprehensive solution.

- You need a **simple, affordable ASSE-1001-compliant solution** for an outdoor hose bib or sprinkler system.

- Your local plumbing codes **require a vacuum breaker** for your setup.

- You want a **reputable brand** with easy installation.

- You have a **commercial irrigation system, swimming pool, or high-risk water source** that requires **full backflow prevention** (e.g., an RPZ device).

- Your system experiences **extreme pressure fluctuations** that could damage the breaker over time.

- You suspect **debris buildup** is a recurring issue (consider a self-cleaning model or regular maintenance).

For most **residential outdoor water use**, this vacuum breaker is a **wise and necessary purchase** to ensure safe, code-compliant operation.

Details:

part #: mea46990m prices

• $45.00-$101.19

specifications valvesplumbing:

• brand: Watts
• mpn: Mea469-90m
• part type: Vacuum Breaker
• maximum pressure: 125 Psi

payments valvesplumbing:

• credit card: Visa
• wallet: Google-pay
• other

returns valvesplumbing:

• policy: No Returns

general valvesplumbing:

• Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Vacuum Breakers
• condition: Used

seller valvesplumbing:

• city: San Antonio, Texas
• # reviews: 2249
• rating: 98.8%

offer valvesplumbing:

• options: Ship-to-home
• quantity: 1
• sold: 0
• availability: In Stock
• started: March 11, 2026

shipping valvesplumbing:

• transit: 7-10 Days
• cost: $0.00
• type: Calculated
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard

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