Picture shows disassembled air valve indicating placement of O-rings.
O-Ring kit contains all 3 O-Rings required.
(An Air Relief Valve has 5 parts... and 3 of them are o-rings !!! )
.
This sale is for the O-Ring kit only (2nd picture).
Air Valve and Pressure Gauge are NOT included
No special tools are required to replace the O-rings. Can usually be done within 20 minutes or less.
Full instructions are provided with your kit purchase.
There is a YouTube video showing how to change the o-rings:
https://www.youtube.com/watch?v=Z1LEKa1Cft0
(copy and paste this link into your browser)
If you have drips or leaks or constant running water coming from the valve (3rd picture) on the top of your Pentair Pool filter, this kit is likely what you need. Bad o-rings can also allow air to enter your system.