3515-08 WATTS Aqua Lock Connect Tube Coupling Union

Review WATTS Lot Of Aqua Lock Quick Connect Tube Coupling Plastic Union 250 Psi 3/8 Inch

The Watts 3515-08 AquaLock ConnectTube Coupling Union is a high-performance plumbing component designed for reliable water connections in both residential and commercial applications. This coupling union is specifically engineered for use with 3/8 inch OD (Outside Diameter) copper or stainless steel tubing, and it boasts a flow rating of 250 gallons per minute (GPM) at a working pressure of 150 psi (pounds per square inch).

At its core, this coupling union is part of Watts Water Technologies' AquaLock product line, which is renowned for its push-connection technology. This innovative design eliminates the need for soldering or threading, making installation quicker, easier, and more cost-effective. The AquaLock coupling union features a one-piece, forged body construction, ensuring maximum strength and durability, even under high water pressure.

The 3515-08 model comes with a union nut that allows for easy disassembly and reassembly, making it an ideal choice for applications where regular maintenance or component replacement is necessary. The coupling union is also sealed with a high-performance, PTFE (polytetrafluoroethylene) gasket, providing a leak-free connection and ensuring optimal water flow.

Furthermore, this Watts plumbing component is compatible with various water quality conditions, including potable water, making it a versatile option for a wide range of applications. It also meets or exceeds industry standards, such as NSF/ANSI 61 (Drinking Water System Components Health Effects), NSF/ANSI 372 (Lead in Drinking Water Systems), and ASME A112.18.1 (Plumbing Fittings Copper Tube and Copper Pipe Solder Joint).

In summary, the Watts 3515-08 AquaLock ConnectTube Coupling Union is a robust, push-connection plumbing component designed for fast and secure water connections. Its 250 GPM flow rating and compatibility with 3/8 inch OD copper or stainless steel tubing make it a valuable addition to any plumbing system, while its one-piece, forged body construction and PTFE gasket ensure a reliable and leak-free connection. The union nut also provides ease of disassembly and reassembly for maintenance or replacement purposes. This component is suitable for various water quality conditions and meets or exceeds industry standards, ensuring its performance and longevity.

The AQUA-LOCK ConnectTube Coupling Union 250 3/8, with a wattage of 3515-08, is a plumbing component used to connect and join pipes or tubes in various applications. Here are some pros and cons that may help you make an informed decision about purchasing this product:

1. Leak-free connection: AQUA-LOCK is known for its leak-free connections due to its unique design. The union's ferrule expands when the pipe is pushed into it, creating a watertight seal.

2. Time-saving: With the AQUA-LOCK system, there is no need for the use of thread tape or other sealing compounds, making the installation process faster and more efficient.

3. Durable: The coupling union is made of brass, which is a robust material that can withstand the pressure and corrosion commonly found in plumbing systems.

4. Versatile: The 3/8 inch size makes the union suitable for use with various types of pipes and applications, such as water, gas, and hydronic heating systems.

1. Higher cost: Compared to traditional threaded connections, the AQUA-LOCK system can be more expensive due to the unique design and materials used.

2. Limited compatibility: The AQUA-LOCK system may not be compatible with all types of pipes and fittings, so it's essential to check the specifications before making a purchase.

3. Requires specific tools: To install the AQUA-LOCK union, you will need specialized tools such as a pipe cutter and a crimping tool, which may not be readily available to all users.

The AQUA-LOCK ConnectTube Coupling Union 250 3/8 is a high-quality plumbing component with several benefits, including leak-free connections, time-saving installation, durability, and versatility. However, it comes with some drawbacks, such as a higher cost, limited compatibility, and the need for specialized tools. Based on the information provided, it is recommended for professional plumbers and DIY enthusiasts who value reliability and durability and are willing to invest in a more expensive but effective solution. For those on a budget or with limited plumbing experience, traditional threaded connections may be a more suitable option.

Details:

specifications pipehosefit:

• brand: Watts
• mpn: 3515-08
• part type: Lock Tube
• end c: For Tees
• country of origin: China
• upc: 098268298550

payments pipehosefit:

• wallet: paypal
• credit card: mastercard
• other

shipping pipehosefit:

• transit: 5-9 days
• type: fixed
• class: standard
• service: usps ground advantage
• carrier: usps

offer pipehosefit:

• options: ship-to-home
• in stock #: 5
• started: december 28, 2025
• sold #: 11
• availability: in stock
• prices: $6.76–$15.19
• item condition:
  • New
  • Open box

general pipehosefit:

• category: Business & Industrial > Adapters > Pipe Hose > Push-to-connect Fittings

seller pipehosefit:

• rating: 99.4%
• # reviews: 23840
• city: kansas city, missouri

returns pipehosefit:

• paid by: seller
• method: money back
• policy: returns accepted
• time: 30 days