This area of the site is dedicated to supporting the FIMCO indexing valve and any other products FIMCO manufactures. We try to be as comprehensive as possible, but please let us know via the contact form or by phone during our business hours if you have any unresolved issues or need additional help.

rotating the cam to troubleshoot an indexing valve

Rotating the Cam

This troubleshooting technique only works if all of your outlets are live, meaning you have a four-outlet valve with four zones, a six-outlet valve with six zones, etc. For the four-outlet valve, there’s still an outlet every 90°; for a six, there’s one every 60°. It won’t affect the function of the valve adversely in…

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finding old threads in plastic

Walk Screws Backwards & Add Years to an Indexing Valve

This method can add years to the life of many plastic products. Each time you remove and replace screws in plastic, they cut new threads. This can be done numerous times before an issue arises, but eventually, it will. The trick is simple; Lightly (and slowly) press down while turning the screws counter-clockwise. Eventually, you…

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Standard O-ring Kit

Installing Valve O-Rings

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…

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Indexing Valve Installation Instructions

Increase the pipe to a minimum of one size larger (minimum of one inch) immediately after the water meter. Use no smaller than a one-inch solenoid valve on city water systems. Flush all lines coming to or going out from the indexing valve to clear debris before installing. IMPORTANT: PLACE THE COUPLING NUT ON THE…

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FIMCO Saddle with Vacuum Breaker

Snap on Saddle and Vacuum Breaker Instructions

FIMCO snap-on saddles are an easy way to add sprinklers or vacuum breakers to a new or existing irrigation system. There is no need to cut pipes and add T fittings. Here’s the procedure for installing a FIMCO snap-on saddle with a vacuum breaker: If the saddle came with the vacuum breaker installed, first unscrew…

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5-zone Cam

Instructions for changing the Fimco Cam

Remove the four screws that attach the cam cover or zone indicator to the valve top and lift it off. One slot in the cam goes all the way through; align the lobe on the stem up with that slot and remove the cam. Ensure that an o-ring is present on both sides of your…

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FIMCO Zone Indicator

Instructions for Installation of a Zone Indicator

The zone indicator works with all valve models manufactured since the year 2000. To Install your Zone Indicator, you must: Remove the four screws that attach the cam cover to the valve top. Remove the cam cap, ensuring the O-ring on the top of the cam stays in place. Place the zone indicator shaft into…

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Standard Fiberfill Valve Top

Replacing the Fimco Valve Top

Directions for Changing the Fimco Valve Top Loosen the coupling from the coupling nut. Unscrew the 6 or 8 screws (depending on the valve size) from the perimeter of the valve top. Lift the valve top with the stem and disc assembly attached from the valve bottom, making sure not to lose your screws. Work…

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Mini Standard Flow Stem and Disk Assembly

Replacing the Stem and Disk Assembly

Directions on how to replace your Fimco Stem and Disc Assembly: Loosen the coupling nut from the coupling. Unscrew the 6 or 8 screws around the perimeter of the valve. Remove the valve top. Work the stem & disk assembly up into and out of the valve top until it disengages. Insert the new stem…

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Identify an Indexing Valve

Indexing Valve Series Identification of an indexing valve is fairly straightforward. If you know the pipe size in and out you can simply consult the following list: 1000 Series – 1″ in and 1″ out 2000 Series – 1.25″ in and 1.25″ out 3000 Series – 1.5″ in and 1.25″ out 4000 Series – 1.5″…

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Indexing Valve is Sticking on Zones

If the indexing valve is sticking, whether it be on random zones or on all zones, it’s usually easy to fix. Most times it’s one of a handful of issues and generally simple to diagnose. The first thing to do is to make certain the system is inactive. Once the system is inactive, remove the…

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Indexing Valve is Skipping Zones

Jumping or skipping zones is the most common issue faced by indexing valves. Sadly, it’s not the indexing valve causing the issue but rather how it integrates with the rest of the irrigation system and how that system is operating. Think of it like this: the indexing valve has one moving part; it’s incredibly simple…

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Water Flowing To Multiple Zones At The Same Time

Water flowing from multiple outlets means that the disk is not seating completely inside the valve housing. This issue could be due to a handful of factors. Lack of Water Volume Without sufficient water volume, the disk won’t sit properly and water will seep into the inactive outlets.  Many people want to argue this point,…

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