Schedule 40 PVC Pipe Slip x Slip x Slip x Slip Cross Fitting (1" Dia.) - 420-010 Cross fittings have one inlet fitting and three outlet fittings. Slip (or slip x slip x slip x slip) cross fittings have four slip fittings for connection with four same-sized smooth end pipes Care should be taken when using crosses in plumbing applications as they can generate large amounts of stress on the connecting pipes as temperature changes occur These fittings are generally used in fire sprinkler and irrigation systems, but are not recommended in regular plumbing applications. All 4 ends have slip fittings All of our Schedule 40 fittings are NSF rated 14 & 61, which means they are certified for use with potable (drinking) water. Maximum temperature is 140 degrees F.