Kap-It plus Riser includes a regulator built into the 2 in. stem, so that you can more effectively water your lawn or bed areas. With the Kap-It plus Riser you are able to maximize water pressure to 40 PSI across all heads. This balances out the distribution of the water and makes the flow the same throughout your sprinklers in a given zone. Add Kap-It plus Risers to your shrub adaptors and pop-ups for optimal water efficiency. Sprinklers operating at optimal pressure last longer and more importantly, help to save water. Not only does your system benefit from adding Kap-It plus Risers, but so does your lawn and shrubbery as Kap-It plus helps eliminate misting and fogging caused by excessively high water pressure. By adding 40 PSI pressure regulation Kap-It plus Riser to shrub adaptors and pop-ups, Kap-It plus will maintain 40 PSI on fixed spray nozzles up to 4 GPM (gallons per minute) with inlets greater than 50 PSI. Need to raise a sprinkler pop-up in your lawn. We recommend the Kap-It plus packs that include the Kap to protect the riser from mowers, weed whippers and everyday yard traffic. KAP-IT plus Riser allows anyone to raise a sprinkler head from the top instead of from the bottom. By extending the stem of a standard riser, you have raised the height. Simple, Secure, Fast and Permanent jump up your nozzle with a KAP-IT plus Riser. Material: ABS Plastic.