SABS 0400: 1990 Code of Practice for the Application of the national Building Regulations, Part P: Drainage2. Pressure includes: absolute, gauge, atmospheric, and negative (vacuum) pressures, and their relationship to height.3. Water principles include: Hydrogen bonds; Surface tension; Capillary action; and Meniscus;4. Quality of water principles include: hardness/softness; solubility; suspended solids; salinity; turbidity; bacterial levels; scaling.
5. Erosion principles include: damage to components, and the misapplication of components.
6. Pollution includes for: Effluent, and backflow prevention.
7. Pipe design and sizing includes: selecting one or two pipe designs; determining site and structural constraints; select practical routing; determining available supply pressure; determining required terminal pressure; determining friction loss factors; determine maximum design velocity; and determine probability of simultaneous use.
8. Permissible friction losses are calculated per meter run and for the whole system.
9. Pipe sizing includes for: selection from pipe manufacturers friction loss tables; checking against max velocity; checking against total permissible loss.
10. Valves include: globe; ball; plug; float; butterfly; gate; RSV; diaphragm; control, air relief; vacuum relief; pressure reducing; pressure relief; temperature and pressure safety. Also: strainers/filters; fire/hydrant; actuators; and solenoids.
11. Meters include: volumetric/rate of flow, Types: rotary piston; fan wheel – inferential; helix; woltmann; and turbine. Understand: vortex shredding; orifice plate; magflow; turbine; combination; and the legal requirements and restrictions.
12. Pumps include: positive displacement, piston; diaphragm; mono; impeller, (centrifugal and primed); self-priming; turbine multistage; hot water circulating; submersible; borehole; basic pump installations, and hand pumps.
13. Pipe and fitting materials include: Copper, High density Polyethylene (HDPE); Polypropylene, uPVC; Wrought steel; Seamless steel; Cast iron/Ductile iron; Fibre cement, etc.
14. Hot water systems include: Pressurised storage; Roof tank fed; Combination; Push-through (open outlet); Instantaneous; Heat pumps; Storage calorifiers; Trace heating; Solar (direct and indirect) two part; Industrial; Insulation; and Circulating flow and return.
15. Terminal fittings include: Screw down taps & mixers; Ceramic disc taps & mixers; Medical; Electronic; Thermostatic; Demand; Metering; Flush valves; Shower mixers; Disabled; and an understanding of Water and Energy conservation.
