KS ISO 13844:2022.

Plastics piping systems - Elastomeric-sealing-ring-type socket joints of unplasticized poly(vinyl chloride) (PVC-U) for use with PVC-U pipes - Test method for leaktightness under negative pressure.

Specifies a method for testing the leaktightness of single sockets of unplasticized poly(vinyl chloride) (PVC-U)