Condensate Drain Trap Vent

It s the height at which water will no longer flow from the trap via gravity the rim of the cup so to speak see how siphons are created below. The vent opening should always rise above the trip level of the condensate overflow switch when it is in the primary drain line or pan or above the secondary aux overflow port on the primary drain pan. The secondary heat exchanger outlet is sealed inside a plastic part called the collector box which is designed to collect the condensate and drain it out.

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Condensate drain trap vent.

The trap weir is the point at the bottom of the trap arm pipe where it connects to the trap. Another key component of a p trap is an air vent the air vent prevents the drain that comes after the p trap from siphoning the water in the trap out. This helps ensure that if a backup occurs that the water properly trips the switch instead of overflowing out of the vent. It had a condensate pump to pump the water just a few feet up to a drain that went to a common drain.

Trap and vent a drain debacle. Condensate drain lines are commonly tied to vents and or drains. Energy saving iron steam traps also known as thermostatic steam traps these vent cool air and condensate to increase energy efficiency in your steam lines. Most furnaces will have at least 2 internal drains typically one for the heat exchanger and one for the vent usually at the inducer outlet or on the inducer housing.

The cleanout after the trap is supposed to be a vent not a cleanout which means it needs to be uncapped and vented higher than the indoor drain pan so that if the drain backs up the water goes back into the system and trips the condensate switch. The trap arm is the portion of a fixture drain between a trap weir and its protecting vent. Also known as inverted bucket steam traps these provide near continuous discharge to accommodate high condensate levels. Here is our finished product.

The weight of the water in the trap is enough to prevent this while still allowing condensation to flow freely. March 30 2020 bryan orr 2 comments.

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