Many new homes also utilize these types of drainage systems.
Old basement floor drain diagram.
Basement floor drains don t get a lot of attention until the sewer backs up or the basement smells like an outhouse.
Many basement floor drains tie directly to the home s sewer system but in some communities local building codes require floor drains to run to a sump pit where a pump lifts the water to the exterior surface of the house.
Floor drains are most often installed during original construction often in the utility area to drain away excess water in the basement.
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In many older homes floor drains are part of the basement design built in to prevent water damage to the house and its contents.
Immediately beneath a sink bathtub or other plumbing fixture the fixture drain opening leads to a curved segment of pipe known as the p trap which is normally a 1 1 4 to 2 inch diameter segment of pipe with a sharp curved bend in it shaped like the letter p.
The purpose of this drain trap is to hold standing water which seals the drain system and prevents sewer gases from.
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This water gets refreshed whenever more water runs through it.
This is an expensive repair as it involves breaking up the concrete in the basement floor replacing the drain then pouring new concrete.
Old floor drains work passively their design based on principles of physics.
This diagram of a typical dwv system is called a plumbing tree.