Calibration Hoses (also known as expansion or inversion bladders and inflation or cal tubes) are typically used in conjunction with open ended liners within CIPP (Cured-In-Place Pipe) rehabilitation and repair processes. Their function is to provide:
A pathway for the curing agent
Pressure against the inner wall of the liner during curing while it sets in place
Fenner Precision’s unique Silicone Calibration Hoses have been supplied to the No – Dig market since CIPP’s invention around 50 years ago, providing a reusable and high quality solution for pipe renewal and repair.