814.2 Condensate Control.

California Plumbing Code (Title 24, Part 5) · 2019 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

Where an equipment or appliance is installed in a space where damage is capable of resulting from condensate overflow, other than damage to replaceable lay-in ceiling tiles, a drain line shall be provided and shall be drained in accordance with Section 814.1. An additional protection method for condensate overflow shall be provided in accordance with one of the following: (1) A water level detecting device that will shut off the

equipment or appliance in the event the primary drain is

EQUIPMENT CAPACITY IN TONS OF REFRIGERATION	MINIMUM CONDENSATE PIPE DIAMETER (inches)
	34

	14
	12

The size of condensate waste pipes is for one unit or a combination of units, or as recommended by the manufacturer. The capacity of waste pipes assumes a ¹ ⁄8 inch per foot (10.4 mm/m) or 1 percent slope, with the pipe running threequarters full at the following pipe conditions:

DB WB 90°F 73°F For SI units: °C = (°F-32)/1.8	DB WB 75°F 62.5°F

tions shall be approved by the Authority Having Jurisdiction.

(1) A water level detecting device that will shut off the

equipment or appliance in the event the primary drain is blocked. (2) An additional watertight pan of corrosion-resistant mate rial, with a separate drain line, installed beneath the cool

Air-conditioning waste pipes shall be constructed of materials specified in Chapter 7.

(2) An additional watertight pan of corrosion-resistant mate rial, with a separate drain line, installed beneath the cooling coil, unit, or the appliance to catch the overflow condensate due to a clogged primary condensate drain. (3) An additional drain line at a level that is higher than the

primary drain line connection of the drain pan.

(3) An additional drain line at a level that is higher than the

primary drain line connection of the drain pan. (4) An additional watertight pan of corrosion-resistant mate rial with a water level detection device installed beneath

(4) An additional watertight pan of corrosion-resistant mate rial with a water level detection device installed beneath the cooling coil, unit, or the appliance to catch the overflow condensate due to a clogged primary condensate drain and to shut off the equipment. The additional pan or the additional drain line connection shall be provided with a drain pipe of not less than ³ ⁄4 of an inch (20 mm) nominal pipe size, discharging at a point that is readily observed.

814.2.1 Protection of Appurtenances. Where insulation or appurtenances are installed where damage is capable of resulting from a condensate drain pan overfill, such installations shall occur above the rim of the drain pan with supports. Where the supports are in contact with the condensate waste, the supports shall be of approved corrosion-resistant material.