WSFU is used to calculate water supply service systems

2.2 Source Design Water Supply System Definition

UFC 3-230-02 O&M: Water Supply Systems. Series: 3 - DISCIPLINE-SPECIFIC CRITERIA. 3-200: CIVIL / GEOTECHNICAL / LANDSCAPE ARCHITECTURE. This UFC provides general technical guidance for operating and maintaining potable water systems. PREFACE December 1998 T he field of water resources covers a wide range of topics and s ubject matter. This handbook focuses on one of those, the issue of water supply planning and resource mana gement.

The WSFU (Water Supply Fixture Units) is defined by the Uniform Plumbing Code (UPC) and can be used to determine water supply to fixtures and their service systems.

• 1 WSFU = 1 GPM = 3.79 liter/min
• 1 in = 25.4 mm

Note that this conversion is only true for one or a few fixtures. Since all fixtures in a system are never used at the same time, the total units achieved by adding the numbers for all fixtures must be compensated for their intermittent use.

For supply pipe lines this is taken care of in the sizing tables.

For manifolds or special equipments sizing, a formula or a table can be used.

Related Topics

• Water Systems - Hot and cold water service systems - design properties, capacities, sizing and more

How To Design Water Supply System

Related Documents

2.2 Source Design Water Supply System

• Cold Water Storage Capacity - Required cold water storage capacity - commonly used fixtures and types of buildings
• Cold Water Storage per Occupant - Cold water storage for occupants in common types of buildings as factories, hospitals, houses and more
• Cross-Contamination Control - It is fundamental to keep the potable water in the water supply systems uncontaminated
• Domestic Hot Water Service Systems - Design Procedure - Design procedure for domestic hot water service systems
• Drainage Fixture Unit Values - DFU - DFU are used to determine the drainage from fixtures and required capacity of sewer service systems
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• Fixture Units - WSFU vs GPM and Liters/sec - Converting WSFU - Water Supply Fixture Units - to GPM
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• Hot Water Circulation Return Pipe - Hot water can be circulated through a return pipe if it's instantly required at the fixtures
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• Sizing Water Supply Lines - Sizing water supply service and distribution lines based on Water Supply Fixture Units (WSFU)
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• Water Supply - Calculating Demand - Calculating expected demand of water supply in service lines
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• Water Supply to Public Buildings - Required water supply to public buildings
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