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  2. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    The simplest, most reliable way to provide backflow prevention is to provide an air gap. An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool. A simple air gap has no moving parts, other than flowing water.

  3. File:Back siphon example hosepipe up hill.svg - Wikipedia

    en.wikipedia.org/wiki/File:Back_siphon_example...

    With a water system configured like this, instead of water flowing from the loft tank into the outside pool, water from the outside pool will siphon into the loft tank. File usage The following page uses this file:

  4. Siphon tubes - Wikipedia

    en.wikipedia.org/wiki/Siphon_tubes

    Siphon tubes are a basic implement used in irrigation to transfer water over a barrier (such as the bank of a raised irrigation canal), using the siphon principle. At the simplest they consist of a pipe with no working parts. To work they rely on the water level in the canal being at a higher level than the water level in the field being irrigated.

  5. Siphon - Wikipedia

    en.wikipedia.org/wiki/Siphon

    A siphon spillway in a dam is usually not technically a siphon, as it is generally used to drain elevated water levels. [34] However, a siphon spillway operates as an actual siphon if it raises the flow higher than the surface of the source reservoir, as sometimes is the case when used in irrigation.

  6. Atmospheric vacuum breaker - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_vacuum_breaker

    If the pressure in the "upstream side" is reduced to atmospheric pressure or below, the poppet valve drops and allows air to enter the system, breaking the siphon. [1] One-Inch Brass Atmospheric Vacuum Breaker mounted on PVC Pipe. These devices, since they work on atmospheric principles, cannot be installed in an enclosure containing air ...

  7. Flow device - Wikipedia

    en.wikipedia.org/wiki/Flow_device

    Successful pipe designs (e.g. Flexible Pond Leveler, Castor Master, Clemson Pond Leveler) achieve this by protecting the intake end of the pipe with a cylindrical fence enclosure. A beaver swimming along the outside of the fence enclosure is unable to hear or feel the flow of water into the pipe and cannot reach it to block it.

  8. Trap (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(plumbing)

    Trap with copper drain pipe at underside of firestop packing in two-hour fire-resistance rated concrete floor slab Typical P-trap. Maintaining the water seal is critical to trap operation; traps might dry out, and poor venting can suction or blow water out of the traps. This is usually avoided by venting the drain pipes downstream of the trap ...

  9. Surface irrigation - Wikipedia

    en.wikipedia.org/wiki/Surface_irrigation

    Water may be supplied using gated pipe, siphon and head ditch, or bankless systems. The speed of water movement is determined by many factors such as slope, surface roughness, and furrow shape, but most importantly by the inflow rate and soil infiltration rate. The spacing between adjacent furrows is governed by the crop species, common ...