Description

• A domestic water system is a system that provides water for domestic purposes. It is used to carry hot and cold water throughout the house, and pipes convey water from the source to various appliances. The system can take water from a public water system (Municipal). The domestic water system has two parts: the first part brings in clean water, and the second takes away the wastewater.

Baseline

• Domestic water line chases must be adequately protected to drain or otherwise capture condensation from cold water lines.
• The sizing of domestic water supply system must be based on the minimum pressure available for the development buildings. The designer must ensure that the required pressure is maintained at the most hydraulically remote fixture.
• The designer should investigate the main water pressure available at the project site. If there is no sufficient pressure available, then a booster pump will be required and if the pressure is too high, then a pressure regulating valve will be required.
• The flow velocity of the water distribution system shall be controlled to reduce the possibility of water hammer. A water-hammer arrestor shall be installed where quick-closing valves are utilized and when otherwise required by this code. Water-hammer arrestors shall conform to ASSE 1010.
• Valves shall be the following types: Globe Valve, Ball Valve, Butterfly Valve, Check Valve, Gate Valve, and Needle Valve.
• Identify locations where existing insulation on domestic cold and hot water piping is worn-out or missing and provide insulation. It is not clear how to identify worn-out or missing insulation on piping installed into chase walls. [COMPMOD]
• Provide valves at the kitchen water supply to allow easy installation of resident-purchased washing machines. [COMPMOD]
  • For proper drainage of the washing machine, ensure that the following elements are installed: a standpipe at least 2” in diameter that is tall enough to extend past the washing machine’s overflow line, a P-trap to prevent hazardous and potentially flammable sewer gases from entering an apartment, a vent at least 1 1/2” in diameter, a washer box for supply line connections, a wastewater drain, and a water-hammer arrestor in the line designated for washing machines.
• Washer hookups should be fully inset into the wall and include a water supply and drain line; a dedicated electrical outlet nearby should be located. [PACT]
• Existing exposed piping should be sanded and repainted. [PACT]

Stretch

•   Reuse greywater for toilet flushing. [SA]

Strategies

Optimize Performance, Operation & Maintenance of Buildings, Systems & Assets

CompModPACTSustainability AgendaCommercial BathroomsCommunity CentersCommercial Kitchens

Last Updated on June 10, 2024 at 3:01 pm

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Specifications

22 05 17 - Sleeves and Sleeve Seals for Plumbing Piping

22 11 00 - Piping Material

22 11 16 - Domestic Water Piping

22 11 19 - Domestic Water Piping Specialties