2 x 30,000-litre Plastic Water Tank (13,200 Gallons)

• Description
• Specs
• Instructions
• FAQ

• Included in this Combo Special

  • 2 x 30,000-litre Water Tanks
  • 2 x 20" Filters
  • 1 x Tank Balancing Kits
  • 1 x 110W UV filter
  • Trevoli Pump - CM4-60E Stainless Steel Water Pump
  • More information on the Water Pump
  • Excluded - the fittings and pipes to connect the pump to the UV fitting and to connect the hose connection kit to the pump

  Tank Description

  • We offer a full 20-Year Repair or Replacement Warranty (not pro-rata).
  • Our super-tough dome design is the largest on the New Zealand market. The dome has the smallest radius, which gives it engineered support.
  • We have the heaviest standard plastic water tank on the market; at 500kg this is in direct relation to wall thickness and product quality & strength.
  • The tank is available in a range of colours and is designed for potable drinking water.
    • Please contact us should you wish to use these 30,000-litre water tanks for any other use.
  • Outlet Size: 50mm BSP
  • Manufactured in Auckland, New Zealand. 

  Tank Standards

  • Raw Material
    • Type: Medium Density Polyethylene
    • Standard: AS/NZS 2070 - Food Contact Requirements
  • AS/NZS 4020:2005 - Potable Drinking Water
  • AS/NZS 4766 Polyethylene Storage Tanks for Water
  • Manhole access with removable lid

• Diameter	3.78 m (3,780mm) each
  Height	3.1 m (3,100mm) each
  Weight	1,000kg (2 x 500 kg)
  Volume	60,000 litres (2 x 30,000 litres)
  Outlet	50mm BSP
  UV Rating	UV20
  Compliance	Australian food contact requirements (AS2070:1,8) and potable (drinking) water standard AS4020

  Pump Specs

  Power	1100W - 1.5HP
  Rated Voltage	220-240VAC, Single phase with standard NZ 3 pin plug (Available in three phase with no controller)
  Liquid Temperature	-20 to 70 deg C
  Max Flow Rate	120 litres per minute
  Max Pressure	10Bar/84PSI
  Inlet size	1 1/4 inch BSP (32mm)
  Outlet Size	1 inch BSP (25mm)
  Duty Rating	Rated for continuous duty
  Suction	1.5m Max
  Discharge head	Max 58m
  Protection	Built in thermal overload protection Insulation Class F IP55 Rated
  Dimensions	Length 443mm x Height: 210mm x Width: 133mm

• • Please download our Tank Installation and Warranty.
  • Our tanks can be buried up to 700mm while still retaining their full 20-year warranty. Please see our Buried Tank Installation Details in the FAQ's section.

  Feel free to contact us should you have any questions or need any further information.

  Accessories

  We have a full range of Accessories to add to your water tank(s) including:  

  • Water Tank Pumps
  • Water Tank UV Filtration Systems
  • Gutter Protection
  • Storm Water Fittings

• ▼Why Choose Big Water Tanks?

  Big Water Tanks 30,000 litre Water tanks are strong, with a simple design to optimise the most strength, we have the heaviest shot weight of any standard 30,0000 litre water tank on the New Zealand Market

  Our Dome

  our Dome has the most curve on the market, that combined with the heaviest shot weight, makes this dome fully self supporting, without the need for a frame to support it.

  Please note that while we have developed the strongest dome, the tank still needs to be vented, suction from a pump can cause any dome to collapse if the air cannot move.

  Plastic Material

  Our Plastic is manufactured here in New Zealand to an incredibly high NZ AUS Standard and is suitable for potable water

  Our plastic resin has been specifically designed as a large tank grade material with the best UV Stabilisation available

  No Corrugations

  Our tanks have no corrugations or indentations, the reason for this is strength.

  We Believe that the corrugations create a weaker tank because they allow for more movement like an accordion in a vertical direction creating small stresses at each corrugation

  In the process of rotational moulding corrugations are thinner on the convex curves and thicker on the concave creating an uneven wall thickness through the tank,

  The larger surface area of a corrugated tank means that with the same amount of plastic the effective wall thickness is reduced

  ◄How does Delivery work?

  Pricing

  Please use the checkout procedure for estimates on freight, we reserve the right to cancel an order if freight is incorrectly calculated by our website, our site cannot calculate some rural areas or island deliveries, we will contact you if there is an issue with a freight costing to your location.

  We Deliver Water Tanks throughout the North of North Island, Our rates are based on distance, that makes us a bit more expensive for "far away" deliveries we can arrange freight to most islands, please call us or contact us with your address and details we can confirm the price for the delivery

  Delivery Process

  Our Delivery prices are subject to our approval and are to the "gate", however we will normally assist putting the tank into its final location if it is safe for us to do so and our vehicles can make the trip, sometimes a digger or crane is required in hard to reach locations

  Please notify us of any known obstacles, low bridges low power lines or narrow roads... en route to your property we can decide how to accommodate your delivery before we leave.

  Tanks are Pushed off the drivers side of the trailer and land on the base of the tank in a safe location, the tank can be pushed, dragged or lifted into the final installation location.

  ◄How do we Install a Water tank?

  Buried Tanks

  A buried tank needs careful consideration and every situation is a little different, while our tanks are strong enough to be buried up to 700 mm we recommend that you give us a call to discuss your specific situation.

  Tanks like swimming pools can pop up out of the ground if there is no water in them, if a tap in the house is left on in the middle of winter when the ground is very damp, if the tank empties the buoyancy is huge it will lift out the ground and will break connection pipes and mean the tank would need to be reinstalled...

  As a simple guide you cannot bury a tank deeper than the lowest part of your section or natural drainage with a 1:100 fall. So if you have a flat site or section with no falls or that is very flat, burying the tank is not recommended or covered by our warranty in the event of uplift.

  Download our Instructions

  Download a PDF of our installation instructions

  ◄How Much Water Storage is needed?

  Lets keep this simple"ish" because there are a large number of factors that increase or decrease water usage....

  An average house is 200m² with an average rainfall of 1200mm thats 240,000 L rainfall a year

  If you collect all your water (none overflows) that the following per person per year:

  • 1 Person 657L
  • 2 Persons 328L
  • 3 Persons 219L
  • 4 Persons 164L
  • 5 Persons 131L

  The New Zealand water usage average is about 200L per person per day (this is an average not conservative country living...)

  In Summer months the average north island water fall is as low as 72mm / month, this can be as low as 10-20mm per month in bad months...

  Our Water tank can store 30000L of water this with a minimum rainfall of 30mm for 3 months on a 150m² roof is:

  30,000L if full + 30 x 3 x 150 = 43,500L for 90 days of bad weather

  • 1 person 480L
  • 2 Persons 240L
  • 3 Persons 160L
  • 4 Persons 120L
  • 5 Persons 96L

  60,000L if full + 30 x 3 x 150 = 73,500L for 90 days of bad weather

  • 1 person 800L
  • 2 Persons 400L
  • 3 Persons 266L
  • 4 Persons 200L
  • 5 Persons 160L

  As a basic rule 1 tank for up to 3 people and 2 tanks for 4-6 people, larger installations of three tanks only help if there is adequate roof collection area

  Give us a call, drop us an email or message us on the below links we can assist you with your calculations based on your area and roof.