D.O.T. (Department of Transportation) approved Push to Connect fittings are the most commonly used connection in air brake applications.  The compact style of a Push to Connect fitting is well suited for installing in confined areas. However D.O.T. regulations require all nylon tubing air brake connections have fittings with an inner tube support.  The tubing slides into the fitting and the metal inner tube support slides into the tube. This provides a more solid connection for over the road air brake systems.

1. Remove burrs on the end of the pipe which can cut into the O-ring and make slight serrations where the fitting collar will slide on to allow for an adequate grip.
2. Ensure that the Push to Connect fittings are recommended and approved for the application.

Push to Connect fittings are much easier to use compared to compression fittings.  And they are more practical than permanent solvent-gluing CPVC and PVC pipes or sweat-soldering brass pipes with a torch in general plumbing applications.  These fittings have proven to provide highly reliable connections even when they are hidden behind panels or other enclosed areas.  When making joints for new installation or repair using brass tube, PEX or CPVC, Push to Connect fittings are the easiest and fastest method to provide an air or fluid tight seal when the tube or pipe is inserted.

Let’s focus on Push to Connect fittings.  They are available in different materials and are selected based on the application and tube material.  These fittings are typically made of:

• Aluminum
• Brass
• Stainless steel
• Composite
• Nickel-plated Brass
• Plastic polymer
• Brass PEX (Cross-linked polyethylene)

Fast and Repeatable

Push to Connect couplings allow for a fast and easy way to repeatedly connect and disconnect air or fluid lines.  If a tube or hose in a fluid or air system needs to be disconnected and reconnected on a frequent basis the best solution is a Push to Connect fitting.  It will improve productivity, ensure a properly sealed connection and eliminate downtime.

Applications & Benefits of Push to Connect Fittings

Most of us have never had this happen.  Many years ago I was pulling away from the gas pump and I heard a pop-bang noise and then the sound of scraping as though I was pulling something.  I jumped out of my car to find the gas hose lying on the ground sticking out of my car.  I started to panic.   I looked at the pump expecting gas to be shooting out at high pressure.  Surely the entire gas station was about to explode.  But nothing happened.  Still freaked out that I broke it, I went inside.  With obvious fear in my voice I explained what happened to the woman behind the counter.  She laughed and said not to worry about it.