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⏰ Person getting up 🚰 Vertical pipe 🪜 Stair step part
riser

riser

5 7.0
A vertical pipe in a building that carries water, gas, or waste to different floors
  • noun
  • /ˈraɪzər/
  • Specialized
translation icon : tubería vertical
  • Sanitary plumbing for the towers consists of vertical drainage pipes (called sanitary risers or stacks) connecting to bathrooms on every floor.
  • sanitary riser
  • riser pipe

Examples

  • During the inspection, the engineer found that the riser was leaking and needed immediate repairs.

  • Before connecting the appliances, check that the riser carries both hot and cold water effectively.

  • POLE #BT41865MLN needs to be replaced. Need to fix riser and single-phase primary at this location as well.

    Blog text (2)

  • The source of make-up air in this case was the sanitary riser connecting through the floor drains.

    Academic text (2006)

  • Backflow from sanitary risers into indoor spaces can occur because air inside the pipe rises as water flows down.

    Academic text (2006)

  • The plumber installed the riser to ensure water could reach all the upper floors of the building.

Synonyms

drainpipe
vsriser
9 2.5

A pipe that carries water away from a building, for example from the roof

focuses on vertical distribution of services within a building
standpipe
vsriser
  • Specialized
2 7.2

A vertical pipe that carries water in buildings for fighting fires and plumbing

is the same vertical channel but used for general supply across floors
riser pipe
vsriser
  • Specialized
1 6.5

A vertical tube that carries water or gas up between floors in a building

is the single-word form more often used in labels
downpipe
vsriser
  • UK
1 3.0

A pipe that carries rainwater from a roof to the ground or drain

is about vertical internal distribution to floors, not roof drainage
riser pipeline
vsriser
  • Specialized
6.5

A vertical pipe in a building that carries water or gas to different floors

is the shorter term covering the same vertical distribution function
riser main
vsriser
  • Specialized
7.2

A vertical pipe in a building that carries water or gas to different floors

is a general vertical pipe term not limited to main supply use

Compounds

riser pipe
  • Specialized
1 6.5

A vertical tube that carries water or gas up between floors in a building

natural riser
5.8

A person who wakes up early without an alarm

riser main
  • Specialized
7.2

A vertical pipe in a building that carries water or gas to different floors

riser pipeline
  • Specialized
6.5

A vertical pipe in a building that carries water or gas to different floors

Surface Forms

riser singular
risers plural

Morphology

riser = rise (transparent) = rise + er

The technical sense (vertical pipe that 'rises' through floors) is a straightforward nominalization from 'rise' and clearly follows productive English word-formation.

Etymology

Riser comes from rise + -er, where rise means 'to move up'. A building or plumbing riser is a vertical pipe that goes up through the floors to carry water or gas, so the name describes the pipe that 'rises' through the building.