Water Line Size Chart

Inches required water service pipe size see reverse side.

Water line size chart. Locate the flow rate in gpm demand along the left side of the chart using the gpm demand from step 1. Size water line software. Water supply fixture units wsfu and minimum fixture branch pipe sizes. Be sure your well digger puts in a 1 and 1 4 inch plastic line from the.

As an example simply increasing a water line from 1 diameter to 1 1 4 will almost double the volume of water for an additional cost of around 100 00 or 200 00 dollars. 304 8mm 1 gallon m 3 785l m. Equations displayed for easy reference. Click here to get free fast bids from plumbers in your city or town to help increase your water pressure.

Includes 53 different calculations. 1 inch 25 4mm 1 ft. Water pipe sizing charts. Unit sizes provided in the table 1 and table 2 is in mm but the size of pipes in the chart is in inch.

The tables below can be used to size building supply and branch lines and meter and service lines. Watch this short video to see computer software that will help you size your water lines. If requesting less than a 2 line provide licensed system designer calculations for review. The nyc dep has a carefully constructed sizing table available to ensure that proper sizes are used when water line repairs are done following them is vital to increasing water pressure.

Maximum water supply fixture units wsfu meter and street service lines inches building supply and branch lines inches length of pipe feet 40 60 80 100 150 200. It s from australia but the principals are the same all over the world. For piping flow charts not included use manufacturers tables and velocity rec ommendations. Appliances appurtenances and fixtures not referenced in the table below shall be permitted to be sized by reference to fixtures having a similar flow rate and frequency of use.

Water velocity should not be greater than 2 438m s at valve seat to prevent noise and erosion. Always ask a plumbing contractor to verify the correct size do not take this important step for granted. Inches for new residential construction with fire suppression system a 2 water service line will be assumed. Sizing of water piping system not adopted by the state of oregon.

Existing water service pipe size. Use the following steps andfigure d 1 to determine the size of the pipe the velocity and the friction loss from point a to point b. The listed fixture unit values represent their load on the cold water building supply. 1 cubic foot per minute 0 4719 l s 1 square foot 0 0929 m2 1 degree 0 0175 rad 1 pound per square inch 6 895 kpa 1 inch 25 4 mm 1 foot 304 8 mm.

Supply pressure 30 45 psi. For all examples the following metric conversions are applicable.