TacoTank Fitting with Drain and Shutoff Valve - 438-2

TacoTank Fitting with Drain and Shutoff Valve - 438-2

The Taco 438-2 Tank Fitting is engineered for optimal air control in hydronic heating systems. This fitting integrates seamlessly with your existing plumbing to maintain a consistent air cushion, ensuring stable pressurization and smooth system operations.

This robust 1-inch NPT tank fitting, rated at 125 psi and up to 240 degrees Fahrenheit, features a cast bronze body designed to withstand the rigors of frequent use in both residential and commercial water systems. The unique function allows it to separate and route free and entrained air into the pressure tank, preventing air re-absorption and enhancing system efficiency.

Features

• Efficient air control to stabilize water level fluctuations.
• Built with durable cast bronze for longevity.
• Equipped with a shut-off valve for quick isolation.

Specifications

What Our Experts Think

• All-in-One Functionality: Combines a tank fitting, shutoff valve, and drain valve in a single compact unit—ideal for simplifying maintenance and installation.

• Durable Construction: Made from rugged cast bronze to withstand harsh hydronic system environments.

• Easy Isolation: Built-in shutoff valve allows you to isolate the expansion tank without system drainage—ideal for service or replacement.

• Efficient Drainage: Integrated drain port makes system purging and maintenance fast and mess-free.

• Versatile Fit: 1" NPT connections ensure compatibility with most standard hydronic setups.

• High Performance: Rated up to 125 PSI and 240°F—reliable for high-demand residential or light commercial systems.

• Accessories Included: Comes with air tube extensions (6" and 12.25") for flexible installation and air cushion management.

Q&A

Q: What is the Taco 438-2 Tank Fitting used for?
A: The Taco 438-2 is a tank fitting that combines a drain and shutoff valve. It is designed for use in hydronic heating and cooling systems to maintain proper pressurization and control air retention in expansion tanks.

Q: Is the Taco 438-2 still available?
A: This model has been discontinued. Suitable alternatives may be available from Taco or other manufacturers.

Q: Where is this fitting typically installed?
A: It is installed between the expansion tank and the system piping to allow for tank isolation, controlled air retention, and convenient drainage.

Maintenance Tips

• Inspect connections regularly for leaks

• Exercise the valve occasionally to prevent seizing

• Ensure air tubes are clear and unobstructed

• Drain system as needed using integrated port