Hayward 1-1/2" MPT Vacuum Lock Wall Fitting [Gray] (W400BLGP) nutsboltsscrews Using the proper reverse-thread screw

Using the proper reverse-thread screw helps protect the impeller

The dark grey Emerald Cut style adds a more refined visual element than a plain functional insert alone

This style is useful when replacement fence hardware needs to be matched to an existing system or adapted to a specific installation layout

This type of part is especially useful when the original timer has stopped keeping accurate schedule control or no longer switches the connected load correctly

Helps verify flow before connected equipment operates

Hayward 1-1/2" MPT Vacuum Lock Wall Fitting [Gray] (W400BLGP) nutsboltsscrews Using the proper reverse-thread screwThe Hayward vacuum lock wall fitting is designed for compatible pool wall suction applications where the wall fitting needs replacement. A wall fitting is useful because it provides the connection point for vacuum or suction side equipment while helping maintain a finished look at the pool wall. This replacement is especially useful when the original fitting is cracked, leaking, damaged, or no longer threading correctly. Matching the correct 1 1 2