Pressure decreases with height

Plumbing · Flow and Pressure · printed page 259 (PDF page 260)

Book index entries

Decreases with Height Supply Plumbing – Pressure Decreases With Height Flow and Pressure of Water in Supply Plumbing Supply Plumbing – Flow and Pressure Water Flow – and Pressure in Supply Plumbing

Text in the illustration

47 PSI
51 PSI
55 PSI
58 PSI
60 PSI
1 PSI will make water rise 2.31 feet
always test the water pressure at the highest point in the house to get the most meaningful results
30 ft.
27 ft.
21 ft.
18 ft.
12 ft.
9 ft.
0 ft.
3rd floor
2nd floor
1st floor
cross section

Generated explanation

A house cross section shows a water supply pipe entering at the basement and rising to fixtures on three floors. Pressure callouts decrease from 60 PSI at the supply entry to 58 PSI at the basement fixture, 55 PSI at the first-floor fixture, 51 PSI at the second-floor fixture, and 47 PSI at the third-floor fixture. Elevation marks indicate heights from 0 to 30 feet. An annotation states that 1 PSI will make water rise 2.31 feet, and another recommends testing water pressure at the highest point in the house for the most meaningful results.

Components

water service pipe water supply riser fixture supply piping faucets sinks floor assemblies

Related illustrations

1511

Pressure decreases with height

· p. 260

A house cross section shows a water supply pipe entering at the basement level and rising to serve fixtures on three floors above. Pressure callouts decrease from 60 PSI at the 0-foot entry elevation to 58 PSI at the bas