A pipe installed to vent, a fixture trap and which connects with the vent system above the fixture served or terminates in the open air.

• Individual vent

• Stack vent

• Loop and circuit vent

• Relief vent

Trap size of fixtures for Wash basin.

• 1 ¼”

• 1”

• 2 ¼”

• 2”

Trap size of fixtures for slop sinks (ordinary).

• 2”

• 3”

• 1”

• 4”

Minimum cost. Least efficient subject to clogging, noisy. Simple washout and emptying through small irregular passage way, prohibited by some health codes.

• Wash down

• Reverse trap

• Blow out

• Bidet

Trap size of fixtures for Urinals (through).

• 1”

• 2”

• 2 ¼”

• 1 ½”

Includes water supply and distribution pipe; plumbing fixture and traps, soil, waste and vent pipes; house drain and house sewers including their respective connections.

• Water reservoir

• Siamese connections

• Plumbing system

• Trap seal

Trap size of fixtures for Water closets.

• 4”

• 6”

• 2”

• 3”

Ratio of water closets for female population for elementary and secondary school.

• Ratio of 1:45

• Ratio of 1:25

• Ratio of 1:55

• Ratio of 1:30

A valve which in the water flow is shut off by a flat disk that is screwed down onto its seat.

• Compression valve

• Overhead storm drain

• Pressure reducing valve

• Union patente

The luminous flux density incident on a surface.

• Illumination

• Flood level

• Plumbing system

• Fixture branch