• Customer Login
  • Hoover on Facebook
  • Hoover on Twitter
  • Hoover on LinkedIn
  • 800.548.1548
  • Home
  • About Us
    • Why Hoover?
    • Testimonials
    • Timeline
  • Solutions
    • Water Delivery Systems
      • Irrigation Pump Station Design
      • Irrigation Pump Station Installation
      • Pump Station Restoration & Renovation
    • Landscape Health & Appearance
      • Hoover Flowguard
      • HIRIMS - A Complete Irrigation Solution
    • Preventative Maintenance Program
      • Field Service & Repairs
  • Markets
    • Residential Communities and HOAs
    • Irrigation Systems For Property Developers
    • Golf Course Irrigation
    • Sports Turf Irrigation
    • Resorts & Hospitality
    • Institutional & Commercial
  • Case Studies
    • Irrigation Projects
  • Hoover Hub
    • Resources
    • Blog
  • Careers
    • Service/Sales Administrator
    • Project Manager/Estimator
    • Pump Service Technician
    • Installation Technician
    • Mechanical/Electrical Assembly Associate
  • Contact
  • Customer Login

Glossary of Irrigation Terms

  • The H₂O Zone
  • Water Management Resources
  • Glossary of Irrigation Terms
Search for glossary terms (regular expression allowed)
  • All
  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
  • Q
  • R
  • S
  • T
  • U
  • V
  • W
  • X
  • Y
  • Z
Osmotic Pressure

Pressure, sometimes called potential, is a measure of the pressure caused by water as it moves through an irrigation system. Osmotic pressure is specifically the pressure of water which contains dissolved molecules, generally salts and other nutrients. Often the water will be passing through a semi-permeable membrane, from a less to a more concentrated solution of nutrients.   

Orchard Valve

An outlet valve fitted to the interior of a vertical pipe (sometimes known as a riser). The orchard valve features an opening the same size as the diameter of the pipe and an adjustable cover to enable the flow of water through the pipe to be varied. Orchard valves are similar to alfalfa valves, but deliver lower flow capacity.

Operating Pressure

A measure of the pressure at which an irrigation system actually operates. Calculated by taking the static pressure of the water at the point of connection to the water source and subtracting any pressure losses occurring through the system. The operating pressure is usually measured at the base or nozzle of the sprinklers.

FPL

Leadership in Energy Conservation Award

SFMA

Manufacturer of the Year

 
US Green Building Council

LEED AP Experts on Staff

Certified Technicians

Certified Technicians

Hoover Pumping

800.548.1548

2801 N Powerline Road Pompano Beach, FL 33069

Quick Links

  • Projects
  • Contact
  • Terms and Conditions
  • Site Map
  • Hoover on Facebook
  • Hoover on Twitter
  • Hoover on LinkedIn

© 2025 Hoover Pumping Systems Corporation. All rights reserved.