Diagram Floor Drain

The photo at right shows a floor drain as viewed from the side.

Diagram floor drain.

Suitable for no hub or service weight cast iron sch. The shaded portion shows the trap where water will always sit which prevents sewer gas from coming in. This diagram of a typical dwv system is called a plumbing tree. 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.

Floor drains are no exception. The center of the lav s drain is located 18 approximately above the finished floor. Floor and area drains floor drain selection factors pipe connection no hub standard butt connection using no hub or neoprene coupling suitable for cast iron plastic and most other piping applications. This water gets refreshed whenever more water runs through it.

When you look at an installed floor drain all that you typically see is the grill on top. The purpose of this drain trap is to hold standing water which seals the drain system and prevents sewer gases from. Grate free area is defined as the total area of the drainage openings in the grate the drain outlet should be sized large. Sufficient top size and grate free area to pass the anticipated flow are required.

Floor drains are primarily used for inside locations where the flow rate into the drain can be anticipated. Water runs down the sink drain into a p trap so called because it s shaped like the letter which fills up with water to prevent sewer gases and odors from getting into the house through the pipe. Also notice the drain is centered right in the middle of this 30 inch vanity. The rest of the drain is always buried in the basement.