Condensates

Condensates CMC 310

  1. Discharge: to approved plumbing fixture via indirect waste: tailpiece, mop sink, ceiling tile, above shower/tub CMC 310.1
    • Discharged to approved disposal area CMC 310.1
      1. Into the ground
      2. Not the driveway or any other location that can drain to the street
      3. Cannot drain to crawl space or basement floor
      4. Roof downspout (approved material) into the approved disposal area
  2. Corrosion-resistant material CMC 310.1. PVC, CPVC, Copper ok per. BO 
  3. Slope: 1% min CMC 310.1
  4. Condensate pump: discharge shall rise vertically to a point where it is possible to connect to a gravity condensate drain and discharge to an approved location. The pump shall be interlocked with the equipment to prevent the equipment from operating during a failure CMC 310.1.1
  5. A condensate drain can discharge to a non-approved location if it is first treated with a neutralizer, and only if the neutralized is approved for that application MI
  6. Condensates shall be provided with a cleanout CMC 310.3.1
  7. Condensates shall be trapped per the manufacturer’s instructions
  8. Check the manufacturer’s instructions. Some equipment requires a neutralizer MI
  9. Hangars and Supports: same as plumbing
  10. Thermal Expansion: Allow for thermal expansion and movement in all plastic piping (same as plumbing)
  11. Protection from damage: nail plates (same as plumbing)
  12. Where installed in a space where damage is capable of resulting from overflow additional protections shall be provided per ONE of the following:
  1. Water level detecting device to shut off the equipment CMC 310.2 (1)
  2. Pan with a separate drain line CMC 310.2 (2)
  3. Additional drain line at a level higher than the primary drain line CMC 310.2 (3) 
  4. Pan with water level detecting device to shut off the equipment CMC 310.2 (4)
  5. The additional pan or drain line shall be ¾” and discharge to a point that is readily observed (“over a window or door”) CMC 310.2
  6. Insulation installed where damage is capable of resulting from a condensate drain pan overfill shall occur above the flood rim of the pan CMC 310.2.1

Condensate Pipe Size CMC table 310.3

Tons of Refrigeration___Min Pipe Diameter

up to 20__________________¾

21-40_____________________1

41-90_____________________1 ¼

91-125____________________1 ½

126-250___________________2