The Indexing Valve contains 4 O-rings. The O-rings are located on the Valve Top, the Valve Coupling, and the Valve Cam. Your valve will either have 8 screws that hold the top to the bottom which would require a Standard Valve O-Ring Kit (found here: https://www.fimcomfg.com/product/standard-valve-o-ring-kit/ ) or 6 screws that hold the top to the bottom which would require a Mini Valve O-Ring Kit (found here: https://www.fimcomfg.com/product/mini-valve-o-ring-kit/ )
In order to replace all of these O-rings you will need to take apart your valve.
It is best to be familiar with your valve by first reviewing the anatomy of an indexing valve here: https://www.fimcomfg.com/#valve-anatomy
You will then start by:
- Replacing the Coupling O-ring:
Remove the coupling nut from the coupling. This will separate your valve from the valve inlet. You will have an O-ring to replace on the coupling.
2. Replacing the Cam O-Rings.
Remove the four screws that attach your cam cover to your valve top and lift it off. There is one slot in the cam that goes all the way through, line the lobe on the stem up with that slot and remove the cam. Sometimes it is easier to push up and down on the stem and disc assembly until you are able to remove the cam. Replace the O-rings on both the top and the bottom of the Cam. When you reinstall your cam make sure that the numbers are facing up and that the notch in the cam is lined up with the locator pin on the valve top.
3. Replacing the Valve Top O-ring
Lift the valve top with the stem and disc assembly attached from the valve bottom making sure not to lose your screws. The Valve Top O-ring will be located directly underneath the top.
When re-installing your valve top we suggest first turning the screw counter clockwise until you feel a ‘pop’ as the screws falls into the old thread. You can then turn the screw clockwise and tighten. This prevents the chance of stripping out screws as they form new thread in the plastic. It is always best to install with a hand held screwdriver.
Individual instruction for each valve part can be found on our support pages here: https://www.fimcomfg.com/support/