Minnesota Legislature
Office of the Revisor of Statutes
Minnesota Administrative Rules
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4715.1770 MINIMUM PRESSURES REQUIRED IN WATER DISTRIBUTION SYSTEM.
§
Subpart 1.
Requirement.
Based on the minimum static water pressure available, pipe sizes shall be selected so that under conditions of peak demand a minimum flow pressure at the point of discharge shall not be less than shown in subpart 2.
In determining minimum pressures at the outlets, allowance shall be made for the pressure drop due to friction loss.
§
Subp. 2.
Table of minimum flow pressure and flow rates.
| Location | Flow Pressure psi |
Flow Rate gpm |
| Ordinary basin faucet | 8 | 2.0 |
| Self-closing basin faucet | 8 | 2.0 |
| Sink faucet, 3/8 inch | 8 | 2.0 |
| Sink faucet, 1/2 inch | 8 | 2.0 |
| Bathtub faucet | 8 | 6.0 |
| Laundry tub cock, 1/2 inch | 8 | 5.0 |
| Shower | 8 | 2.0 |
| Ball cock for closet | 8 | 3.0 |
| Flush valve for closet | 15 | 15-35 |
| Flushometer valve for urinal | 15 | 15.0 |
| Drinking fountains | 15 | 0.75 |
| Sill cock-wall hydrant | 10 | 5.0 |
Statutory Authority:
MS s 16B.59 to 16B.75; 326.37 to 326.45; 326B.101 to 326B.194; 326B.43 to 326B.49
History:
23 SR 686; 28 SR 146; L 2007 c 140 art 4 s 61; art 6 s 15; art 13 s 4; L 2008 c 337 s 64
Published Electronically:
May 14, 2012
Official Publication of the State of Minnesota
Revisor of Statutes