Our 1" PVC Spigot or Slip adapters connect the Action Manifold System to you PVC pipe. You can glue 1" pipe to the inside or 1¼" pipe to the outside of the adapter. Our heavy duty manifold systems are constructed out of thick schedule 80 PVC, o-ring sealed for tool-less installation and fully unionized. Never cut your system apart again to change a junk valve. With our wide range of manifolds and adapters, you'll have you system up and running in no time.