50 lb Recovery Tank for R134a - Safe DOT/CSA Compliant

In this review the Mastercool 66011 50 lb. Recovery Tank is assessed for HVAC and automotive technicians who need a robust way to capture and transport recovered R134a refrigerant. The bottom line: this tank is built to regulatory standards and focused on safe, practical recovery rather than frills. For pros who value durable construction and an automatic overfill safeguard, the Mastercool delivers sensible performance and peace of mind during routine recovery jobs.

Key Features

• DOT and CAN/CSA compliance: Built from HP325/HP345 high-strength steel and powder-coated for durability, the tank meets DOT-4BA400 and CAN/CSA-B339-02 standards so technicians can transport recovered refrigerant with confidence.
• 80% fill float switch: The integrated float switch automatically stops recovery at 80% capacity, preventing overfilling and reducing the need for constant monitoring.
• Y-valve for liquid and vapor: The y-valve design allows switching between liquid and vapor recovery modes, providing flexibility for different service tasks and refrigerant states.
• 1/2' ACME connection for R134a: The dedicated 1/2' ACME fitting ensures a secure, compatible connection for R134a systems and minimizes the risk of leaks during transfer.
• Collar for easy handling: The collar design gives a solid handhold for lifting and moving the tank, which helps technicians manage the 50 lb capacity safely on the job.

Who It's For

This tank is aimed at HVAC service techs and automotive air conditioning professionals who regularly recover R134a and need a rugged, standards-compliant vessel. It suits workshops and mobile technicians who value reliability, safety features like the float switch, and the ability to handle both liquid and vapor recovery without switching equipment.

It is not for end users who expect ready-filled refrigerant or a multi-refrigerant certified cylinder out of the box, since refrigerant is not included and the fittings are specified for R134a compatibility.

Pros & Cons

Pros

• Solid steel construction and powder coating deliver a durable recovery tank that meets DOT and CAN/CSA standards.
• The 80% float switch provides reliable automatic shutoff to prevent overfilling and improve jobsite safety.
• The y-valve and 1/2' ACME fitting make switching between liquid and vapor recovery straightforward for R134a systems.
• Collar design improves handling and transport when the tank is in use.

Cons

• Refrigerant is not included, so users must source R134a separately before service.
• The tank is specified for R134a fittings; users needing multi-refrigerant compatibility may require adapters or a different model.

Specifications

Capacity	50 lb recovery
Material	Powder-coated HP325/HP345 high-strength steel
Standards	Meets DOT-4BA400 and CAN/CSA-B339-02
Float switch	80% fill float switch with auto shutoff
Valve/fitting	Y-valve for liquid/vapor and 1/2' ACME for R134a
Included refrigerant	None (refrigerant not included)

Our Verdict

The Mastercool 66011 is a practical, well-built 50 lb recovery tank that prioritizes safety and compliance for technicians working with R134a. Its float switch, y-valve, and ACME connection make routine recovery straightforward, and the sturdy construction offers good value for shops that need a reliable vessel for recovered refrigerant transport.

Frequently Asked Questions

Is refrigerant included with the tank?
No, refrigerant is not included; the cylinder ships empty for safe transport and must be filled with recovered R134a during service.

Can this tank recover both liquid and vapor?
Yes, the y-valve design supports both liquid and vapor recovery modes for flexible operation.

Does the tank prevent overfilling?
Yes, the built-in 80% fill float switch will automatically shut off recovery to reduce the risk of overfilling.