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This DIY guide looks at the various cold water systems found within a home that include direct cold water systems and indirect cold water systems and how each of these systems works to supply water to a variety of appliances.
An indirect water supply system is the most common type found in modern houses. The mains water comes in via a rising main and directly feeds at least one cold tap at the kitchen sink with ‘potable’ water (i.e. water which is fit for drinking, cooking etc) and may also feed a washing machine, a shower and an outside tap etc.
• Major tasks of water systems design: • 1. Assessment & estimation of demands • 2. Supply scheme & schematic • 3. Water storage requirements • 4. Piping layout • 5. Pipe sizing • 6. Pump system design • The systems must comply with Water Authority (WSD) requirements 4
h2x's design software automatically checks designs for compliance with industry standards and regulations, ensuring that water supply, fittings, and bill of materials equal required quantities. This not only reduces the risk of non-compliance but also simplifies the creation of plumbing designs.
System layout and pipework. The water supply system must be designed to achieve appropriate water pressure and flow, and to avoid contamination to potable water. On this page: Water pressure; Water flow rate; Flow rate and pipe size Acceptable Solutions; System layout; Connection to the mains supply; Backflow; Mains connection; Pipe materials ...
• An indirect cross connection is an arrangement whereby unsafe water, or other liquid, may be blown, siphoned or otherwise diverted into a safe water system. Such arrangements include unprotected potable water inlets in tanks, toilets, and
The indirect system of cold water supply has only one drinking water outlet, at the sink. The cold water storage cistern has a minimum capacity of 230 litres, for location in the roof space. The high-rise cold water supply systems have a non-return valve fitted to the outlet of each booster pump.
