Orbit 34778 PVC-Lock x MPT Adapter, 3/4" Easy-to-install push-on fitting that locks into place and is ready to use Ultimate Repair Solution: No glue, primer, clamps or drying time required, saving you a lot of time during the installation process Used to install PVC sprinkler systems - designed for use with Schedule 40, Schedule 80 and Class 200 PVC Max water pressure of 150 PSI For outdoor use with cold water only