Floor drains can mix many sources of waste including wash water used oil chemicals and sediments into a single difficult to manage semi liquid stream.
Floor drain trap diagram.
The plastic washer will hold the trap nut in place while you install the rest of the trap.
As water drains down the steep slope at the wye it can create a siphon effect such that water will be sucked out of the trap.
Many floor drain systems include trenches also known as a sediment trap and use an oil water separator also known as a flammable trap to segregate these wastes.
In these cases the application needs very little water to reseal the trap.
The deep seal trap has a much greater capacity for resealing.
This water gets refreshed whenever more water runs through it.
If cleaning the fixture trap doesn t solve the problem and you ve determined that the clog is in one of the under floor drains then you ll have to rent a drain cleaning machine.
Common parts of floor drain systems.
When installing your vents it s highly recommended that you plan out your drain lines to minimize the risk of clogging.
The diagram at right shows a p trap which can be found at sinks showers and bath tubs.
Insert a trap nut over the sink drain tailpiece with the threads facing down insert a plastic ferrule washer beveled edge down under the nut onto the sink tailpiece.
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The left side of the trap connects to the plumbing fixture and the right side connects to the sewer.
With it you can punch through the clog snag and retrieve an obstruction or cut through roots or stubborn clogs.
A note on the main drain.
This diagram of a typical dwv system is called a plumbing tree.
The sewer side will have sewer gases present but the water sitting in the bottom of the trap prevents the sewer gases from entering in to the house.
They lead into larger branch drain pipes which lead into the 4 inch stack.
Connecting a trap to a vertical drain with a wye fitting and a 45 degree elbow seems like a good idea.
This can be a large warehouse.
The left side of the trap connects to the plumbing fixture and the right side connects to the sewer.
Bathroom sink trap installation.
The diagram at right shows a p trap which can be found at sinks showers and bath tubs.
Both kitchen 1 1 2 inches and bathroom 1 1 4 inches are smaller than the rest of the drain system on purpose.