8 calculators
Plumbing & Water
Pipe volume, drain fall, tanks, flow rate.
Pipe Volume CalculatorWater in a pipe run, and time to get hot waterDrain Fall CalculatorFall over a run, checked against SANS 10400-P drain loadsTank Volume CalculatorCylinder or rectangular tank, full or part-filledFlow Rate CalculatorBucket test to flow, and time to fillSeptic Tank & French Drain CalculatorTank size and french drain length to SANS 10400-PRainwater Tank CalculatorRainwater from your roof and the JoJo tank size to hold itGeyser Size CalculatorGeyser litres for a household, hot water energy and the 50% solar or heat pump ruleBorehole Pump & Tank CalculatorPump flow and head from your yield test, and the tank to store it
Guides for this trade
Plumbing & Water
Geysers, PIRB CoCs and the 50% solar rule
Sizing a geyser for a household, what heating the water costs in kWh, the XA2 rule that half a new building’s hot water must come from solar or a heat pump, and the PIRB CoC.
3 min readPlumbing & WaterWater backup: JoJo tanks, rainwater and boreholes
How much water a roof collects, which JoJo tank holds it, and how to turn a borehole yield test into the flow and head a pump supplier needs.
3 min readPlumbing & WaterDrain falls and septic tanks under SANS 10400-P
Minimum drain size, the falls SANS 10400-P allows by drain load, and how to size a septic tank and french drain from the standard’s tables.
3 min read