Push to connect

The push-to-connect fitting method, uses a fitting and, depending on the manufacturer, an insert stiffener. To make a connection, the installer inserts a stiffening sleeve into the pipe (based on certain manufacturers’ instructions) and then pushes the pipe into the fitting.

When done properly, this is a quick, easy method for connecting PEX. No special tools are needed and the fittings can be removed and reused easily. However, since this method is relatively new to the PEX market, its availability may be limited compared to other products.

Also, due to its higher cost, some in the industry consider push-to-connect a “temporary fix” fitting. Contractors will keep a limited stock on hand for emergencies but then go back and make a “permanent” connection with a different connection method and keep the push-to-connect fitting for another fast fix later.

While push-to-connect fittings are approved for installation behind walls as well as direct burial in soil, the fittings must first be wrapped in an impermeable material to protect the connection from ground contaminants.

Lastly, because some fittings require an insert stiffener and some don’t, it can be difficult to ensure a proper connection is made. The stiffener sleeve keeps the pipe rigid on the inside to make a good seal against the fitting O-ring. If the installer doesn’t push the fitting on far enough and misses the sleeve, there can be potential for leaks. Also, because PEX is more malleable than metal, the fitting’s teeth have the potential to slide off the pipe when subjected to increased pressure or freezing conditions.