Quick Answer: What Does Drainage Fixture Unit Mean?

DFU (Drainage Fixture Unit Values) is defined by the the Uniform Plumbing Code (UPC) and can be used to determine required drainage capacities from fixtures and their service systems.

A fixture unit is equal to one cubic foot of water drained in an 1 1/4 pipe over one minute (≈ 7.48 US gpm, ≈ 0.47 l/s).

What is water supply fixture units?

The WSFU (Water Supply Fixture Units) is defined by the Uniform Plumbing Code (UPC) and can be used to determine water supply to fixtures and their service systems: Individual Fixtures. Minimum Fixture Branch Pipe Size.

How many fixture units is 2 drain?

710.1 Maximum Fixture Unit Load

DIAMETER OF PIPE (inches)MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS (dfu)
Total for horizontal branchTotal for stack of three branch Intervals or less
11/234
2610
21/21220

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What is a DFU?

DFU stands for Device Firmware Update which reloads the software and the firmware of your device. As such, it’s an even deeper restore mode than the recovery mode Apple describes on their website.

How many fixture units is a kitchen sink?

Drainage and venting fixture unit values

Individual fixturesMinimum size trap and trap arm bNumber of units
Clothes, washer, domestic, 2-inch standpipe2 inch3.0
Dishwasher, domestic, with independent drain1-1/2 inch a2.0
Kitchen sink, domestic, with or without food waste grinder and/or dishwasher1-1/2 inch a2.0

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What is a fixture unit rating?

Fixture unit rating. The sizing of sanitary drainage systems is based on a unit of measurement called the fixture unit. Each plumbing fixture has a unit rating which is calculated by considering the rate of discharge, the frequency of use and the time between each use of a plumbing fixture.

How many fixture units is a water closet?

P3004.1 DWV System Load

TYPE OF FIXTURE OR GROUP OF FIXTURESDRAINAGE FIXTURE UNIT VALUE (d.f.u.)a
Water closet (greater than 1.6 gallons per flush)4
Full-bath group with bathtub (with 1.6 gallon per flush water closet, and with or without shower head and/or whirlpool attachment on the bathtub or shower stall)5

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What does DFU mean in plumbing?

DFU (Drainage Fixture Unit Values) is defined by the the Uniform Plumbing Code (UPC) and can be used to determine required drainage capacities from fixtures and their service systems.

What is considered a plumbing fixture?

Definition of plumbing fixture. : a part (such as a sink, toilet, faucet, etc.) that is attached to a system of pipes that carry water through a building.

How do you size water pipes?

In most cases, the main pipeline from the street to your home is either 3/4 or 1 inch in diameter, supply branches use 3/4-inch-diameter pipe, and pipes for individual components are 1/2 inch. Remember that water pressure decreases by a half-pound per square inch for every foot pipes extend above your water supply.

Does DFU mode delete everything?

There are two ways to restore iPhone with iTunes. The standard method does not delete your iPhone data when restoring. On the other hand, if you restore your iPhone with DFU mode, then all your iPhone data gets deleted.

What’s the difference between DFU and Recovery Mode?

DFU Mode allows you to fix any problems that you could not fix with Recovery Mode. The DFU Mode is more comprehensive and advanced than Recovery Mode. Also, with DFU Mode, you can upgrade or downgrade your device to enhance its performance.

How do you convert GPM to DFU?

How to Convert DFU to GPM

  • Locate the Uniform Plumbing Code (UPC) for your state.
  • Locate the drainage fixture unit rating for your device or system in the UPC.
  • Divide the drainage fixture unit rating by 2 to get the gallons per minute of flow for your device or system.