1) Nozzle screw atop sprinkler head should be left in the full “Open” position. All on-off and flow control is done through the LittleValve.

2) Do not crank down on the LittleValve screw; this may damage the part. LittleValves shut down between 96% to 99%. Do not expect 100% shut-off. The objectives are to remove nozzles without shutting down the whole system and control distance of the spray.

3) Except for Drip and Micro-Spray application, for maximum water efficiency, use only 15’ to 17’ nozzles and sidestrips. 15’ nozzles can be reduced down to a 5’ – 6’’ radius without closing down nor distorting the spray. NOTE: Refer to the Drip/Micro-Spray tab for tips, nozzles to use and calculations for Little Valve Drip and Micro-Spray.

4) Side strip nozzles are greatly enhanced with the control you have over them with LittleValves. Whereas you could never control them before, side strips and center strips can now be taken down to 2’ – 3’ left and right. In most cases, we recommend Hunter’s SS530 side strip to ensure watering in front of the sprinkler at all times.

5) When flushing sprinklers with LittleValve parts or fittings, remember: you control the amount of water that is allowed to exit the head. Do not waste water. You can flush with just a couple of cups of water, not the gallons you used to use.

6) With male sprinkler nozzles, (Toro, etc.) remove the little snap-on spacer that affixes to the bottom of the nozzle. Some of these are called pressure compensating devices. Since you control all flow with the LittleValve and each LittleValve product is a pressure-regulating unit, you no longer need this part.

7) On pop-up riser replacements, occasional leaking may occur around the LittleValve screw. If the leakage is insignificant and confined to running down the riser stem, we do not reject the part.

8) Pop-up riser replacements for all Rain Bird 1800 models and 4” & 12” Hit 900 models come with a custom ratchet ring that replaces the original ring. NOTE: Ratchet Ring for Rain Bird 4” and 12” is different than the 6” Rain Bird ring.

9) Pop-up riser replacements for Hunter SRS, Nelson, and Weathermatic also come with a custom ratchet ring.

10) With all Toro, Orbit, Hunter Pro-Sprays and Hit 6” (Model no. 900) no ratchet ring is provided. Use the ring that comes with the head. NOTE: Hunter 6” and 12” stems use a 2-part ring. We supply the black ring; you use the white ring that comes with the sprinkler.

11) LittleValve pop-up riser stem replacements are shipped in the closed position. When changing out replacement stems, discard flush caps. After flushing each head, close LittleValve to insert filter screen and attach nozzle. Then keep it closed to conserve water and keep your jobs drier. We suggest that you not make your final adjustments until after planting is completed. NOTE: LittleValve replacement stems do not need flush caps.

12) Since LittleValve pop-up riser stems stay in the ‘UP’ position with or without the nozzle on, heading up and nozzling up your jobs can be done by just one person and with the RC valve opened all the way.

13) When reducing the spray radius to less than 6 feet, we strongly urge you to insert an LVA filter screen under the LittleValve with all pop-up heads and under LittleValve shrub adapters, couplings and riser extenders. In pop-up stems, push LVA screen, tail first into bottom of stem until it holds in place. With shrub adapters and other fittings, use any manufacturer's filter screen, place on top of schedule 80 or cutoff riser pipe, then thread on part.

14) Pressure regulation or pressure compensation is not necessary with LittleValve sprinklers or parts. Therefore, pressure-regulating stems, PC Screens and PCD’s are eliminated. Pressure-regulating valves installed to reduce misting are generally not needed either.

15) All Rain Bird replacement stems can be purchased with check valves factory-installed.