See Drainage fixture unit
design factor to determine the load-producing value of the different plumbing fixtures. Ex: the unit flow rate from fixtures is determined to be 1 cubic foot, or 7.5 gallons of water per minute.
A measure of the portable hydraulic demand on the water supply by various types of plumbing fixtures. The supply fixture unit for a particular fixture depends on its volume rate of supply, on the time duration of a single supply operation, and on the average time between successive operations.
A "drainage fixture unit" is a common measure of the probable discharge into the drainage system by various types of plumbing fixtures on the basis of one d.f.u. being equal to 7.5 gallons per minute discharge. The drainage fixture unit value for a particular fixture depends on its volume rate of drainage discharge, on the time duration of a single drainage operation, and on the average time between successive operations.
A "supply fixture unit" is a common measure of the probable hydraulic demand on the water supply by various types of plumbing fixtures. The supply fixture unit value for a particular fixture depends on its volume rate of supply operation, and on the average time between successive operations.
An arbitrary unit assigned to different types of plumbing fixtures, and used to estimate flow rate requirements and drain capacity requirements.
In plumbing, a Fixture Unit (FU) is a unit measuring the rate of water flow, equal to one cubic foot of water per minute. One cubic foot of water is roughly 7.48 gallons. A Fixture Unit is used in plumbing design for both water supply and waste water.
