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    1.1 Sizing of Drainage Pipings

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    elcid agsamosam
    This document provides information on sizing drainage piping based on the drainage fixture unit (DFU) method. It lists various plumbing fixtures along with their corresponding trap size and DFU value. It also includes tables specifying the maximum trap loadings and fixture unit values based on pipe size. The minimum pipe sizes for vertical and horizontal drainage piping are determined by the total fixture units connected and, for vertical pipes, their height or length as well, based on tables listing maximum developed length and fixture unit load values.

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    1.1 Sizing of Drainage Pipings

    Uploaded by

    elcid agsamosam
    150 views7 pages
    This document provides information on sizing drainage piping based on the drainage fixture unit (DFU) method. It lists various plumbing fixtures along with their corresponding trap size and DFU value. It also includes tables specifying the maximum trap loadings and fixture unit values based on pipe size. The minimum pipe sizes for vertical and horizontal drainage piping are determined by the total fixture units connected and, for vertical pipes, their height or length as well, based on tables listing maximum developed length and fixture unit load values.

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    1.1 SIZING OF DRAINAGE PIPINGS

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    This document provides information on sizing drainage piping based on the drainage fixture unit (DFU) method. It lists various plumbing fixtures along with their corresponding trap size and DFU value. It also includes tables specifying the maximum trap loadings and fixture unit values based on pipe size. The minimum pipe sizes for vertical and horizontal drainage piping are determined by the total fixture units connected and, for vertical pipes, their height or length as well, based on tables listing maximum developed length and fixture unit load values.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    150 views7 pages

    1.1 Sizing of Drainage Pipings

    Uploaded by

    elcid agsamosam
    This document provides information on sizing drainage piping based on the drainage fixture unit (DFU) method. It lists various plumbing fixtures along with their corresponding trap size and DFU value. It also includes tables specifying the maximum trap loadings and fixture unit values based on pipe size. The minimum pipe sizes for vertical and horizontal drainage piping are determined by the total fixture units connected and, for vertical pipes, their height or length as well, based on tables listing maximum developed length and fixture unit load values.

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    SIZING OF THE DRAINAGE

    PIPINGS
    DRAINAGE FIXTURE UNIT (DFU)
    METHOD
    Section 702: FIXTURE UNIT EQUIVALENT
    The Fixture Unit (F.U.) rating of plumbing fixtures shall MAXIMUM TRAP LOADINGS
    be based on the size of the trap required. PIPE DFU VALUE
    FIXTURE TRAP DFU SIZE
    SIZE VALUE 32mm 1
    BATHTUB 38mm 2
    38mm 3
    BIDET 38mm 2
    DRINKING FOUNTAIN 31mm 1 51mm 4

    FLOOR DRAIN 51mm 2 76mm 6

    GREASE INTERCEPTOR 51mm 3 102mm 8


    LAUNDRY TUBS 38mm 2
    SHOWER (SINGLE STALL) 51mm 2 The fixture unit equivalent of fixtures and devices not
    shown, shall be based on the rated discharge capacity in
    SHOWER, GANG (1 UNIT/HEAD) 51mm
    liters per second. For intermittent flow only.
    SINK 38mm 2
    Discharge Capacity DFU VALUE
    SINK, COMMERCIAL 38mm 3
    Up to 0.47 liter/second 1
    SINK, SERVICE 51mm 3 0.50 to 0.95 liter/second 2
    URINAL, WALL MOUNTED 51mm 2 1.00 to 1.89 liter/second 4
    WASH BASIN/LAVATORY, PRIVATE 32mm 1 1.95 to 3.15 liter/second 6
    WASH BASIN/LAVATORY, PUBLIC 38mm 2
    For continuous flow into a drainage system, such as from sump
    WATER CLOSET, PRIVATE 76mm 4 pump or ejector, air conditioning equipment or similar devices, 2
    fixture units shall be allowed for every 0.063 L/S (1 gpm) of flow.
    WATER CLOSET, PUBLIC 76mm 6
    DANILO V. RAVINA NAMPAP CEBU
    Section 703: SIZE OF DRAINAGE PIPING

    The minimum sizes of vertical and/or horizontal drainage piping shall be determined from the total of all fixture units
    connected thereto, and additionally, in the case of vertical drainage pipes, in accordance with their height or length.

    1. Excluding trap arm.


    2. Except sinks, urinals and dishwashers.
    3. Except six-unit traps or water closets.
    4. Only four (4) water closets or six-unit traps allowed on any vertical pipe or stack; and not to exceed three (3) water closets or six-unit traps on any
    horizontal branch or drain.
    5. Based on one-fourth (1/4) inch per foot (20.9 mm/m) slope. For one-eighth (1/8) inch per foot (10.4 mm/m) slope, multiply horizontal fixture units by
    a factor of 0.8.
    Note: The diameter of an individual vent shall not be less than one and one-fourth (1-1/4) inches (31.8 mm) nor less than one-half (1/2) the diameter
    of the drain to which it is connected. Fixture unit load values for drainage and vent piping shall be computed from Tables 1-1 and 1-2. Not to exceed
    one-third (1/3) of the total permitted length of any vent may be installed in a horizontal position. When vents are increased one (1) pipe size for their
    entire length, the maximum length limitations specified in this table do not apply.
    DANILO V. RAVINA NAMPAP CEBU

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