# Plumbing code fixture unit chart

## How are plumbing fixture units calculated?

A Fixture Unit is not a flow rate unit but a design factor based on the rate of discharge, time of operation and frequency of use of a fixture . 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).

## How many fixture units is a toilet?

TYPE OF FIXTURE OR GROUP OF FIXTURES DRAINAGE FIXTURE UNIT VALUE (d.f.u.)a
Laundry tub 2
Shower stall 2
Water closet (1.6 gallons per flush) 3
Water closet (greater than 1.6 gallons per flush) 4

## How many fixture units does a 4 inch drain have?

DIAMETER OF PIPE (inches) MAXIMUM NUMBER OF DRAINAGE FIXTURE UNITS CONNECTED TO ANY PORTION OF THE BUILDING DRAIN OR THE BUILDING SEWER, INCLUDING BRANCHES OF THE BUILDING DRAINa
4 250
5 575
6 1,000
8 1,400 2,300

## What is a drain fixture unit?

Drain Fixture Unit , or DFU, is a plumbing design factor, or a relative measure of the drain wastewater flow or load for various plumbing fixtures . Here are two quantitaive measures of DFUs: 1 DFU = 1 cubic foot of water drained through a 1 1/4″ diameter pipe in one minute.

## How many fixture units can you put on a 2 inch vent?

Drainage and venting fixture unit values

Individual fixtures Minimum size trap and trap arm b Number of units
Clothes, washer, domestic, 2-inch standpipe 2 inch 3.0
Dishwasher, domestic, with independent drain 1-1/2 inch a 2.0
Kitchen sink, domestic, with or without food waste grinder and/or dishwasher 1-1/2 inch a 2.0

## How many fixtures does a 1/2 water line have?

A 1/2″ water line of 40 ‘ in length can supply 6 WSFU at 35-40 psi. It relly depens on what you intend to use at the same time.

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## How many fixture units is a hose bib?

Including minimum fixture branch pipe sizes

Individual fixtures Minimum fixture outlet pipe size Number of units
Hose bib 1/2 inch 2.5
Hose bib , each additional 1/2 inch 1.0
Kitchen sink, domestic 1/2 inch 1.5
Laundry sink 1/2 inch 1.5

## How do you calculate drain pipe size?

Divide the pipe’s internal diameter by 2. For example, if the pipe has an internal diameter of 0.1 meters: 0.1 ÷ 2 = 0.05 m This is the pipe’s radius. Square this radius: 0.05² = 0.0025 m².

## How do you convert Fixture Units to GPM?

How do you convert drainage fixture units 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.

## Can a toilet shower and sink share a vent?

As a general rule, you will just be able to vent 2 fixtures on a toilet wet vent . 1) Toilet and Sink : The toilet is vented through the sink drain. The toilet drain should be 3″, the sink drain is 1.5″, the shared sink drain/ toilet vent area should be 2″, and the vent going up should be 1.5″.

## Can you vent a toilet with a 2 inch pipe?

The Dry Venting Toilet It’s advantageous to design the plumbing so that the toilet is within this distance of the soil stack so the toilet can be vented by the vent stack. Plumbers usually use 2 – inch pipe for this, which is larger than the plumbing code requires.

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## How many toilets can you put on a 4 inch line?

3 tank-type toilets , one urinal, 4 sinks.

## What is a fixture unit value?

A fixture unit is equal to one cubic foot of water drained in an 1 1/4 pipe over one minute. One cubic foot of water is roughly 7.48 gallons ( 6.25 Imperial Gallons). Fixture unit values can be determined using charts from the International Plumbing Code or similar codes in local jurisdictions.

## What is considered a 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.

## Can two toilets share the same drain?

The vertical pipe that leads from a toilet to the sewer is called the soil stack. Most houses have more than one toilet , and if they are on the same side of the house, their waste lines can usually tie into the same stack. If they are on opposite sides, however, each may need its own stack.