AWWA C620-2026

Spray-in-Place Polymeric Lining for Potable Water Pipelines, 4 In. (100 mm) and Larger

The purpose of this standard is to provide the minimum requirements for the materials and application for the SIPP rehabilitation of existing potable water pipelines 4 in. (100 mm) in diameter and larger.  While the extent of structural enhancement achieved with SIPP rehabilitation is left to the design or consulting engineer, in discussion with the product manufacturer and the constructor, SIPP systems are typically designed to meet the requirements of AWWA Class I (nonstructural) through Class III (semistructural) applications. However, a higher level of service may be achieved for certain host pipe materials by performing additional assessments and applying supplementary rehabilitation measures to address external deterioration. For example, evaluating the host pipe condition and implementing external corrosion mitigation, such as cathodic protection for ferrous pipes, can shift the governing failure modes to those adequately addressed by Class I through Class III liners. By altering the controlling failure mechanism, these measures can provide a level of service comparable to traditional Class IV structural designs, which rely solely on internal liner structural capacity to accommodate future host pipe failure.  It is beyond the scope of this standard to specify design parameters to assess the physical performance of SIPP over their service lifecycles in potable water pipelines.