P Trap Condensate Drain

It s similar to the trap under your kitchen or bathroom sink.

P trap condensate drain.

A p trap is nothing more than a properly shaped piece of pipe no moving parts just the proper shape so gravity does the work for us. Condensate comes from evaporator coil. P traps have to be installed on a suction system so a p trap was added. A central air system routes condensation through a u shaped trap located in the drain line just outside the air handler.

Air conditioning units are shipped from the factory to the job site without a condensate drain trap. 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. Trap failures due to freeze up drying out breakage blockage and or improper installation can compromise the seal against air ingestion through the condensate drain line.

See water won t flow up hill so the 180 degree turn in the drain causes water to get trapped in the bottom of. Air was coming in from the outside and creating a dam which was preventing the con. A p trap is needed to block air and allow condensate to drain properly. What is a p trap.

There is a major difference between using p traps on sanitary applications and condensate removal from an ac unit and that is.