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  • Works quickly and easily to clean and purge the compressed air lines in HVAC control and other pneumatic systems
  • Field-tested procedure
  • Solvent is safe and nonflammable
  • Process is flexible and easily allows for flushing by floor, by section or even by controller


The Pneu-flush System (patent pending) consists of a pressure-tested canister charged with approximately one quart of Vertrel, a revolutionary HFC solvent that has excellent solvency and performance characteristics. The package is pressurized and R-134a is used as a propellant. It is sealed with a special valve fitting that only accepts a specialized Injection Valve, Part Number 4300-89.

Pneumatic systems are installed in thousands of buildings, and they generally consist of an air compressor that supplies compressed air to controllers (i.e. thermostats) that in turn operate controls (i.e. dampers) for cooling, heating and other functions & applications. If the compressor is improperly sized for the demand or if general maintenance has been lacking over time, the controllers (and eventually the controls) will become clogged or plugged with moisture, dirt and other contaminants. In order to return the system to designed capacity and efficiency, a thorough cleaning and flushing is necessary. Such a cleaning requires a solvent with good solvency, material compatibility complete evaporation and no environmental concerns, Pneu-flush meets this demand.

Packaging Size Part Number Additional Info
2 lb canister 4298-01


This product must be used in accordance to the following directions by HVACR professionals only.

  1. Use appropriate and established service techniques.
  2. Use only the Pneu-flush flushing procedure for purging the lines.
  3. Establish baseline performance data through investigation before beginning the repair.
  4. Each installation will require estimating the quantity of flushing solvent to use. Factors to consider: will you flush the entire system or only a portion, the total length and sizes of air lines to be flushed, estimated contamination within the system, and ease of access to the system. Keep in mind that most plugging or contamination usually occurs in lines and controllers nearest the compressor.
  5. Systems which are hard to flush and/or where solvent entrapment is likely should be isolated from the rest of the system and flushed independently, if possible.
  6. Generally, as an average, one canister can flush 250 feet of combined 1/4˝, 3/8˝ and 1/2˝ line. Typically, there will be an average of one controller for every 20 feet of line.
  7. Click on the "Literature/MSDS" tab and download product bulletin 3-99 for help estimating Pneu-flush requirements and for more specific instructions.

Product Information:

Literature Downloads

Download the product bulletin and other relevant literature here.


Download a low resolution file of the product label here.

Product Safety

RTK Information

2611 Schuetz Rd. St. Louis, MO 63043
  • Telephone: 800.554.5499
  • Email:
  • Hours: Mon–Fri: 8:00am - 5:00pm (Central Time)

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