Promax Slimline Water Tanks NZ

Every tank is supplied with PS1 certified seismic restraints included in the price.
(Ask the competitors if they can say the same!)

Promax Slimline Tanks are the leading narrow water-storage solution for Auckland, Wellington, Christchurch and every corner of New Zealand.
Engineered for rainwater harvesting on tight urban lots, these space-saving tanks slide neatly down the side of a home while delivering up to 5000 litres of clean storage.

A one-piece UV-stabilised polyethylene body with integrated seismic restraints arrives ready to bolt down, certified to AS/NZS 4020 (potable water) and comes with a PS1 for the seismic restraints.

Why builders and designers choose Promax Slimline Tanks

• Low height profile meets NZ height-to-boundary rules.
• Free seismic restraints supplied – no extra kit, installs 30 % faster.
• One-piece body – zero joins, welds or internal bolts that can leak.
• UV-stabilised food-grade material with a 5-year warranty.
• Integrated pump cover on 2000 L, 3000 L and 5000 L models.
• Super-narrow 1000 L (310 mm) ideal for gardens and small sections, even using your tank as a fence!

Slimline Tank 1000 Ltr Code SL1001000 $2,063.00	Slimline Tank 2000 Ltr Code SL1002000 $2,844.00	Slimline Tank 3000 Ltr Code SL1003000 $3,728.00
Slimline Tank 5000 Ltr Code SL1005000 $4,661.00

Pre-plumbed Slimline Tank & Pump combos

Factory-assembled packages that cut on-site labour and meet council rainwater-reuse or stormwater specs.

• 50 LPM jet pump, at mains pressure.
• Automatic mains change-over device included and pre-plumbed.
• Ready to bolt down and connect.
• Two-year pump warranty, AS/NZS 4020 approval.
• Ready for use as dual-purpose retention/detention tank, or retention-only tank.

Slimline Tank & Pump 2000 Ltr Code SL1P02000 $4,142.00

Slimline Tank & Pump 3000 Ltr Code SL1P03000 $5,075.00

Slimline Tank & Pump 5000 Ltr Code SL1P05000 $5,687.00

Slimline water tank installation and council compliance (NZ)

• Seismic restraint with PS1 included – suits residential, commercial and industrial builds.
  Check with us for site-specific industrial ratings!
• Height-to-boundary compliant for most councils – perfect for resource consent.
• Free installation guide covers stormwater detention and rainwater-reuse set-ups.
• Pre-moulded 25 mm outlet and extra boss positions simplify council inspection.

For drawings, seismic information or expert advice, call 0800 77 66 29 or use the enquiry form below.
Need documents now? Tick “Send Slimline Specifiers Pack” in the form and we’ll email CAD/PDF drawings, the PS1 certificate, plus install and maintenance guides.