Condensate Drain Pipe Slope

3 4 is sufficient for up to 20 tons according to the imc unless the drain outlet size is larger than 3 4.

Condensate drain pipe slope.

Pipes must slope slightly downhill to drain properly. The drain point must ensure that the condensate can reach the steam trap. He was ignoring the plumbing code 1 8 per foot slope for condensate drain lines and apparently he didn t recognize the potential costs in rot insect damage or mold if we simply let the condensate drain clog due to an improper slope and dust that will enter the line followed by leaks into the building wall up at the air handler. The installation of condensate piping shall be as follows.

Types sizes slope of condensate drain piping. This drain pipe slope calculator will calculate the slope and total drop fall of a drainage pipe over a specified length of pipe. Imc 307 2 2 tells us that an a c condensate drain inside diameter should not be smaller than 3 4 and should not be smaller than the drain pan outlet diameter. Slope the drain shall have a slope of not less than 1 8 inch per foot and shall be approved corrosion resistant pipe not less in size than 3 4 of an inch for air cooling coils and not less than the drain outlet size for evaporative coolers or other equipment.

This type of problem can cause condensate to pool at unwanted locations even if piping is set at a slight inclination so it is important to both. Set piping support at appropriate intervals and. A pipe that slopes too much drains water but not solids. If piping support e g.

Using corrosion resistant material and sized no smaller than the drain connection on the appliance. A pipe that doesn t slope enough won t drain. 307 1 condensate drain piping must be corrosion resistant for condensate from fuel burning appliances. An accurate calculation is essential for properly functioning plumbing.

I traced the pipe through the attice and both units go into the large pvc pipe that goes down the wall and up out of the roof to the vent stack. How to use the calculator. Drain pipe slope calculator. Set piping at a slope of no less than 1 in 100.

The following diagram lays out the different terms that are used in the calculator. My a c units drain into a pvc pipe that is tied in to the house s plumbing. This slope will ensure that gravity as well as the flow of steam will assist in moving the condensate towards drain points where the condensate may be safely and effectively removed see figure 10 3 1.