1.1 This specification covers nonreinforced concrete pipe to be used for the conveyance of irrigation water with working pressures, including hydraulic transients, as shown in Table 1 and for use in drainage.1.2 A complete SI companion to Specification C 118 has been developed—C 118M; therefore, no SI equivalents are presented in this specification. Note 1R`12;This specification is for manufacturing and purchase only and does not include requirements for bedding, backfill,