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  1. #1

    Default When did the mechanical code first state this?

    When did the mechanical code first state this?
    Section 310.0, 310.1 Condensate Disposal:
    Condensate from air washers, air cooling coils, fuel-burning condensing appliances, the overflow from evaporative coolers and similar water supplied equipment or similar air conditioning equipment shall be collected and discharged to an approved plumbing fixture or disposal area.
    If discharged into the drainage system equipment shall drain by means of an indirect waste pipe. The waste pipe shall have a slope of not less than 1/8 inch per foot (10.5 mm/m) or one percent slope and shall be of approved corrosion-resistant material not smaller than the outlet size as required in either Section 310.3 or 310.4 below for air-cooling coils or condensing fuel-burning appliances, respectively. Condensate or waste water shall not drain over a public way.

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  2. #2
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    Default Re: When did the mechanical code first state this?

    The oldest one I have is the 1991 UMC, Section 510 (a), is word for word the same as 310.1 (except for the internal reference section numbers.


  3. #3

    Default Re: When did the mechanical code first state this?

    Is it in any of the Mechanical editions of the IRC?

    Clarksville Home Inspection
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  4. #4
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    Default Re: When did the mechanical code first state this?

    It is not worded the same in the 2006 IRC
    M1411.3 Condensate disposal. Condensate from all cooling
    coils or evaporators shall be conveyed from the drain pan outlet
    to an approved place of disposal. Condensate shall not discharge
    into a street, alley or other areas where it would cause a
    nuisance.
    M1411.3.1 Auxiliary and secondary drain systems. In
    addition to the requirements of Section M1411.3, a secondary
    drain or auxiliary drain pan shall be required for each
    cooling or evaporator coil where damage to any building
    components will occur as a result of overflow from the
    equipment drain pan or stoppage in the condensate drain
    piping. Such piping shall maintain a minimum horizontal
    slope in the direction of discharge of not less than 1/8 unit
    vertical in 12 units horizontal (1-percent slope). Drain piping
    shall be a minimum of 3/4-inch (19 mm) nominal pipe
    size. One of the following methods shall be used:
    1. An auxiliary drain pan with a separate drain shall be
    installed under the coils on which condensation will
    occur. The auxiliary pan drain shall discharge to a
    conspicuous point of disposal to alert occupants in the
    event of a stoppage of the primary drain. The pan shall
    have a minimum depth of 1.5 inches (38 mm), shall
    not be less than 3 inches (76 mm) larger than the unit
    or the coil dimensions in width and length and shall be
    constructed of corrosion-resistant material. Metallic
    pans shall have a minimum thickness of not less than
    0.0276-inch (0.7 mm) galvanized sheet metal. Nonmetallic
    pans shall have a minimum thickness of not
    less than 0.0625 inch (1.6 mm).
    2. A separate overflow drain line shall be connected to
    the drain pan provided with the equipment. This overflow
    drain shall discharge to a conspicuous point of
    disposal to alert occupants in the event of a stoppage
    of the primary drain. The overflow drain line shall
    connect to the drain pan at a higher level than the primary
    drain connection.
    3. An auxiliary drain pan without a separate drain line
    shall be installed under the coils on which condensate
    will occur. This pan shall be equipped with a water
    level detection device conforming to UL 508 that will
    shut off the equipment served prior to overflow of the
    pan. The auxiliary drain pan shall be constructed in
    accordance with Item 1 of this section.
    4. A water level detection device conforming to UL 508
    shall be provided that will shut off the equipment
    served in the event that the primary drain is blocked.
    The device shall be installed in the primary drain line,
    the overflow drain line or the equipment-supplied
    drain pan, located at a point higher than the primary
    drain line connection and below the overflow rim of
    such pan.

    SECTION M1412
    ABSORPTION COOLING EQUIPMENT
    M1412.1 Approval of equipment. Absorption systems shall
    be installed in accordance with the manufacturer’s installation
    instructions.
    M1412.2 Condensate disposal. Condensate from the cooling
    coil shall be disposed of as provided in Section M1411.3.

    G2427.9 (503.9) Condensation drainage. Provisions shall be
    made to collect and dispose of condensate from venting systems
    serving Category II and IV appliances and
    noncategorized condensing appliances in accordance with
    Section 503.8, Item 4. Where local experience indicates that
    condensation is a problem, provision shall be made to drain off
    and dispose of condensate from venting systems serving Category
    I and III appliances in accordance with Section G2427.8,
    Item 4.

    G2427.8 (503.8) Venting system termination location. The
    location of venting system terminations shall comply with the
    following (see Appendix C):
    4. Through-the-wall vents for Category II and IV appliances
    and noncategorized condensing appliances shall
    not terminate over public walkways or over an area
    where condensate or vapor could create a nuisance or
    hazard or could be detrimental to the operation of regulators,
    relief valves, or other equipment. Where local expe-
    rience indicates that condensate is a problem with
    Category I and III appliances, this provision shall also
    apply.

    Last edited by Fred Weck; 03-17-2011 at 02:58 PM. Reason: Font formatting

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