These unique thermoplastic insert stiffeners are designed to prevent the collapse of polyethylene and polybutylene Copper Tube Size (CTS) water service tubing in push fit, pack joint, and compression connections. They are inserted into the pipe prior to joint assembly.

Precision molded from waterworks grade blue thermplastic for optimum strength and ease of installation.
Both the length and outside diameter have been engineered for maximum rigidity of the connection.

Please select 3/4" or 1" size from the drop down menu above.