Floor Drain Flow Capacity

For proper trench drain design you can use the tables below to determine the depth the trench drain or slot drain should be for any given flow rate.

Floor drain flow capacity.

Sizes the piping needed on the acreage to. That said we put together the following tables to serve as general guides for estimating a pipe s water flow capacity. Area drains serve in a similar capacity for drainage of surface areas immediately adjacent to the building. Selection of grate or cover based on anticipated traffic asme a12 6 3 floor drains ratings are as follows.

Liquid to the storm or sanitary drainage system. Checks the capacity of drain tile on existing drainage systems. H d of the sanitary drain cannot exceed 0 5. By the way the drain capacity is dependent on n pipe diameter h d and slope of the pipe after the floor drain.

Floor drains are primarily used for inside locations where the flow rate into the drain can be anticipated. Area drains are designated for outside areas where rainfall intensity dictates sizing. After the top size and anticipated flow are determined by the design professional the following points shall be taken into consideration when selecting the floor drain. There is also a trench drain calculator spreadsheet attached that can help with trench drain design.

Floor drains and accessories combine to form the upstream or entrance terminals of a building s floor drainage system. Increasing the size of floor drain without changing the size of the drain pipe cannot do anything good. These are static lioad ratings and do not take into con. These flow capacity figures are based on the grate assembly only draining to atmosphere with no restrictions.

Water flow gpm gph based on pipe size and inside outside diameters. Drains should be selected with sufficient top size and grate free area to pass the anticipated flow. Floor drains zurn plumbing products groupspecification drainage operation 1801 pittsburgh avenue erie pa 16502 phone 814 455 0921 fax. If you have questions please call our drain wizard at 800 635 0384.

Roof drains zurn plumbing products groupspecification drainage operation 1801 pittsburgh avenue erie pa 16502 phone 814 455 0921 fax. The steeper the grade of the installed pipe the more water it will carry. A particular pipe size on a given grade will only carry a certain amount of water. The actual flow capacity may be reduced due to possible restrictions such as main body size and design drain pipe size strainers sediment baskets debris etc.

Plumbing code requires that the maximum fullness i e. The prinsco drainage calculator estimates the capacity of tile drainage systems.