P Trap On Ac Drain Line

It seems that all of the large ac companies have their installers put a p trap on every unit.

P trap on ac drain line.

There is a major difference between using p traps on sanitary applications and condensate removal from an ac unit and that is. A p trap is needed to block air and allow condensate to drain properly. A p trap serves a very important purpose on an a c unit. It s similar to the trap under your kitchen or bathroom sink.

A central air system routes condensation through a u shaped trap located in the drain line just outside the air handler. See when moist air hits something cold the water condenses out of the air and collects on the cold surface. This video is part of the heating and cooling series of training videos made to a. This one tells why a p trap is necessary on the air conditioner evaporator.

Anytime your drain goes up and down more than once you have a double trap unless you place an air vent between the two traps that vents above the drain inlet. Traps with insufficient height between the inlet and outlet design deficiency on draw through systems can cause the drain to back up when the fan is on possibly causing. Air conditioning units are shipped from the factory to the job site without a condensate drain trap. The double trap causes drainage issues because air becomes trapped between the two traps and air is lighter than water.

What is a p trap you say. Condensate comes from evaporator coil. Ok here is some detail. The ac equipment is set on the slab floor or curb and it is the mechanical contractor s job to install a p trap.

If fan is located before the coil in the system the fan will push small amount of air and water down condensate drain. If fan is located upstream of coil fan will pull water up drain line counter to water flowing down drain. All air conditioners have a special drain for. Also capped the p trap on the.

I guess in an effort to make sure that there is one when it is actually needed. Double traps are no good. That is why in the summer your car drips water. 08 22 2018 09 32 pm 4.