Underground hydrant

The underground hydrants sunk into the ground provide an easily accessible supply of fire-fighting water for the fire brigade.

Underground hydrant

Underground hydrant


  • Support from CWS fire protection officer
  • Installation
  • Consulting
  • Maintenance
  • Acceptance
  • Planning & project engineering
  • Commissioning
  • Instruction / Training


  • Different versions of underground hydrants available

Underground hydrant - advice & maintenance

Underground hydrants are valves sunk into the ground, which are directly connected to the water supply. They are usually located under a street cap and are used to enable the fire brigade, in the event of a fire, to draw water on-site if necessary.

Underground hydrants are marked from the outside by hydrant signs, which mark the exact position of the hydrant. A standpipe is required for water withdrawal, which is attached to the underground hydrant with a claw. The main shut-off valve is operated from above with a hydrant key. Underground hydrants are either installed at the roadside or at event sites.

Variants of underground hydrants:

  1. Height-adjustable underground hydrants
  2. Tele-hydrants (nominal diameters DN 80 and DN 100)

Maintenance of underground hydrants: Underground hydrants must be inspected by a competent person at least once a year. With a maintenance contract from CWS Fire Safety, regular maintenance is carried out automatically, which means that important deadlines are always met.


CWS Fire Safety bietet Ihnen die Installation, Abnahme und Instandsetzung von Unterflurhydranten an.


  • No spatial restrictions, as the underground hydrant can be lowered into the ground

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