How to Install a Geyser in South Africa: Full Step-by-Step
24 May 2026 · Plumbers On Duty
Quick answer
Installing a geyser in South Africa involves: mounting, drip tray, pressure & vacuum valves, hot/cold plumbing, expansion-relief plumbing, electrical wiring on a dedicated breaker, and earthing/bonding. The whole job takes a qualified plumber 3–6 hours and must be signed off with a PIRB Certificate of Compliance for insurance.
Why DIY is risky
- Burst geyser ceiling damage averages R15,000–R60,000 in repairs
- Insurance won't pay without a COC from a PIRB plumber
- Wrong pressure rating = cylinder rupture
- Bad earth bond = electrocution risk
The 10 steps of a proper install
- Drain and remove old geyser (if replacing)
- Inspect the support structure — geysers must sit on rafters or a steel frame, not just ceiling boards
- Install or replace drip tray with overflow to outside
- Position the new geyser on the supports
- Run cold-water inlet with shutoff valve and vacuum breaker
- Run hot-water outlet with vacuum breaker
- Fit the T&P safety valve with discharge to drip tray
- Plumb the expansion-relief line to outside under the eaves
- Electrical: dedicated 20A breaker, 4mm² cable, isolator within 1m of geyser, earth bond
- Fill, pressure test, energise, issue COC and upload to PIRB database
How long it takes
| Job | Time |
|---|---|
| Like-for-like replacement, easy access | 3–4 hours |
| New install with new piping | 5–7 hours |
| Solar geyser system | 1–2 days |
| Heat pump install | 1 day |
Cost breakdown (2026)
| Geyser type | Supplied & installed |
|---|---|
| 100L low-pressure | R5,500–R8,000 |
| 150L high-pressure | R7,500–R14,000 |
| 200L high-pressure | R9,500–R17,000 |
| 250L high-pressure | R12,000–R20,000 |
| Solar geyser system | R20,000–R45,000 |
| Heat pump | R28,000–R55,000 |
Always ask: Is the COC included? It should be.