Laserfiche WebLink
<br />Upper Chamber: The part of the valve the traps water and applies pressure to the <br />diaphragm, l<eeping the valve closed. (Rain bird CD-ROM: What is an Irrigation <br />System?: Components). <br /> <br />Valve: A device that opens and closes to allow pressurized water to flow through. (Rain <br />bird CD-ROM: What is an Irrigation System?: Components). <br /> <br />Valve boxes: Used to conceal and protect the valves, fittings, wiring and manifolds that <br />comprise an irrigation system by housing those components within an underground box. <br />They are also a very efficient way to maintain those components. <br /> <br />Valve circuit: A single valve and all the pipe, fittings and sprinkler heads downstream <br />from it. <br /> <br />Valve Zone: An area where the irrigation is all controlled by a single control valve. <br />Each valve zone should be within only one hydro-zone <br /> <br />Variable Arc Nozzles (VAN's): Nozzles that can be adjusted to spray in a full circle or <br />a partial circle. Useful in odd-shaped areas. (Rain bird CD-ROM: Intro to spray heads) <br /> <br />Water Budget: A controller programming feature that lets you change your usual <br />station run times without resetting each station. One hundred percent equals the normal <br />programmed watering time. On most Rain Bird controllers you can set the water budget <br />from 0% to 300%. (What is an Irrigation System?: Glossary) <br /> <br />Water hammer: A shock wave created by a fast closing valve. Also referred to as surge <br />of pressure. (What is an Irrigation System?: Glossary) <br /> <br />Water meter: Device that measures the amount of water flowing from the water main to <br />the service line on a property. (What is an Irrigation System?: Glossary) <br /> <br />Wiper Seal: This is a soft plastic seal around the pop-up riser stem that seals the riser so <br />it won't leak. The wiper seal also is responsible for l<eeping dirt out of the sprinkler body, <br />and is the most important part in determining how long the sprinl<ler will last. <br /> <br />*** All information was derived from Jess Stryker's irrigation glossary unless otherwise <br />noted. http://www.irrigationtutorials.com/glossary .htm March 2006 <br /> <br />20 <br />