How do I install a JoJo tank in KwaZulu-Natal?

A JoJo tank installation KZN-wide gives you backup water during municipal supply interruptions and lets you harvest rainwater for irrigation. Installing one properly requires more than just a tank on a stand — backflow prevention, pressure pumping, switching valves and a Plumbing COC are all part of a compliant installation. KZN Plumbers lists water tank plumber KZN specialists across the province.

Why JoJo tanks are popular in KZN

KZN has experienced water supply challenges across multiple municipalities — eThekwini, uMgungundlovu, Ugu, King Cetshwayo. Tank backup is increasingly standard for homeowners who want resilience. Beyond municipal supply backup, JoJo tanks enable rainwater harvesting, garden irrigation independence and reduced municipal water bills.

JoJo tank sizes and uses

• 500-1,000L: Garden irrigation only, small homes
• 2,500L: Backup for 2-3 day household supply (small family)
• 5,000L (most popular): Backup for 3-7 day household supply, also irrigation
• 10,000L: Larger families, holiday homes, extended outage tolerance
• 15,000L+: Full off-grid water for some households, irrigation-heavy properties

What a compliant JoJo installation includes

1. Tank and tank stand (raised stands give pressure for gravity feed; ground tanks need pumps)
2. Inlet plumbing from municipal supply or rainwater catchment
3. Outlet plumbing to household or irrigation
4. Pressure pump (if not gravity-fed)
5. Switching valve between municipal and tank supply
6. Backflow preventer — non-negotiable, prevents tank water contaminating municipal supply
7. First-flush diverter (for rainwater harvesting — rejects the dirty initial run-off)
8. Filtration (optional, for potable use)
9. Plumbing Certificate of Compliance (COC)

Installation cost in KZN

• 2,500L tank, basic install (irrigation/garden): R6,000-R12,000
• 5,000L tank, household backup with pump: R12,000-R25,000
• 5,000L tank, full rainwater harvesting setup: R18,000-R35,000
• 10,000L tank, premium pump and filtration: R25,000-R50,000
• Tank only (no install): R3,000-R12,000 depending on size

Backflow prevention: the non-negotiable

If your JoJo tank connects to your household supply, backflow prevention is mandatory under bylaws. Without it, tank water (which may have organic matter, leaves, or rainwater contaminants) can backflow into the municipal supply during pressure drops, contaminating water for your neighbours. eThekwini and other KZN municipalities take this seriously — non-compliant installations can be ordered to remediate, and water connections can be suspended.

Where to position a JoJo tank

• Stable, level ground (a 5,000L full tank weighs 5 tonnes)
• Close to roof catchment (for rainwater harvesting)
• Accessible for maintenance and inspection
• Shaded if possible (reduces algae growth)
• Within reach of household plumbing (longer pipe runs cost more)
• Visible enough that leaks are noticed early

Find a JoJo tank plumber on KZN Plumbers

Browse kznplumbers.co.za and filter for water tank installation. Every listed plumber is PIRB-registered and installs with proper backflow prevention.

Frequently Asked Questions

Do I need a permit for a JoJo tank in KZN?

Most municipalities don't require a specific permit for a residential tank, but bylaws still apply — particularly backflow prevention requirements. Use a registered plumber who knows your municipality's specific requirements.

Can I drink water from my JoJo tank?

With proper filtration and disinfection, yes. Without filtration, treat tank water as non-potable (irrigation, washing, toilet flushing only). For potable use, fit UV sterilisation or carbon filtration.

How long does JoJo tank water last in storage?

Sealed, dark, cool tank water lasts 6-12 months. Algae and bacterial growth are the limiting factors. Dark-coloured tanks reduce algae; periodic emptying and refilling keeps water fresh.

Is rainwater harvesting worth it in KZN?

Yes — KZN gets 800-1,200mm of rainfall per year on average. A 200m² roof can harvest 160,000-240,000L per year, easily filling a 5,000L tank multiple times.

Can a JoJo tank replace municipal supply entirely?

Possible with 15,000L+ tank, rainwater harvesting, and careful management. Most KZN homes use tanks as backup rather than full replacement, since municipal supply is generally available.