Start with the local property, not a generic price list
Pretoria spans everything from older established suburbs with ceiling-mounted geysers original to the house, to newer complexes and estates on the northern and eastern edges of the metro. Older installations more often need a full compliance retrofit (safety valves, vacuum breaker, drip tray) alongside the actual repair or replacement.
A geyser that has stopped heating, is leaking from the tank, or has burst outright is the most common Pretoria call — followed by planned replacements once a geyser passes 8-10 years old, and new installations in renovated bathrooms or granny flats.