Swing joint adaptors are used to go from a BSP to ACME thread.
You need to check what the inlet thread is on your sprinkler, newer larger sprinklers are normally ACME.
*These fit all other irrigation brands ACME inlets.
If you are replacing a sprinkler installed before 2010 you will most likely need to install an adaptor to go from the BSP swing join to the ACME threaded sprinkler.
