The FIMCO indexing valve contains four O-rings. The O-rings are located on the valve top, the valve coupling, and the valve cam. Your valve will either have eight screws that hold the top to the bottom which would require a standard valve O-ring kit, or six screws that hold the top to the bottom which would require a mini valve O-ring kit.
To replace all of these O-rings, you will need to disassemble your valve, though the only tool you’ll need is a Phillips screwdriver. You may want to review the parts diagram below before proceeding.
Replacing the Coupling O-ring
Unscrew the union on the water inlet. Doing this will separate the valve top from the valve coupling. The O-ring is on the coupling, not the valve top.
Replacing the Two Cam O-rings
Remove the four screws that attach your cam cover to your valve top and lift it off. One slot in the cam goes all the way through; line the lobe on the stem up with that slot and remove the cam. Sometimes, pushing down on the stem and letting it spring back up until you can remove the cam is easier. Replace the O-rings on both the top and the bottom of the cam. When you re-install your cam, ensure that the numbers are facing up and that the notch in the perimeter of the cam lines up with the locator pin on the valve top.
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 counterclockwise until you feel a ‘pop’ as the screws fall into the old thread. You can then turn the screw clockwise and tighten them. This method prevents the chance of stripping out the valve housing. We recommend using a standard, handheld Phillips screwdriver.
You can find our complete instruction manual, along with some helpful videos here. It’s always going to be a work in progress, but that’s one of the amazing things about having instructions online. If you fail to resolve your issue, can’t find the answer to your question, or believe there’s something we should add or go over in more detail, please don’t hesitate to reach out.