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Tank Installation Hints



Solar Energy House C/- Simon & Kristina Cope | 19 Manapau Street, Meadowbank, Auckland 1072  |  New Zealand  |  Contact us now to arrange your tour

* Access to the site must have adequate width clearance to allow the truch unrestricted entry to the site.


* Weight of truck and tank can be up to 22 tonnes.


* The site must be level and free from any abstructions such as large rocks. The site foundation must be completely solid so as to disperse the truch weight evenly.


* Room for the trucK hiab stabilising arms must also be allowed for on site. The arms extend 2.5m either side of the truck.


* The site must also be clear of everhead wires. All overhead wires must be a minimum of 4m from the Hiab hook at all times.


* For partially buried tanks the centre of the tank cannot be further than 5m from the position of the truck rear wheels. Allowance must be for excavation battes in this measurement.


* For fully buried tanks the centre of the tank cannot be further than 4m from the position of the truck rear wheels. Allowance must be made excavation batters in this measurement. The excavated hole must be stable and safe before off loading of the Tank can commence.


* Tanks cannot be placed higher than the truck deck height or 1200mm.


* If placement of the tanks is outside these measurements the tanks will require special onsite craneage for placement which is at the cost of the purchaser.



Tanks must always be placed on a bed of compacted sand or fine aggregate of  a similar grade, screeded level to a minimum thickness of 50mm. The base should be approximately 1m greater in diameter than the tank. This will ensure a consistent transferring of the tank weight to the ground.


Multiple tanks to have at least 500mm  distance between them.

The Hynds Elite Water Tank must be installed on solid ground capable of taking the weight of the tank and water contents (31.5 tonnes)


The material forming the tank foundations must have a safe bearing capacity of 100pa (Normal house foundations).


Under no circumstances can any part of the tank be installed on fill material.


Buried tanks should not be backfilled until the water tightness of all connections is tested.


It is recommended that all tank outlets be fitted with a shut off value as close as practical to the tank.


It is recommend that your tank has an overflow outlet and this is piped well clear of the tank foundations.

For partially buried tanks the area surrounding the tank must be free draining. Tanks must also not be installed such that only one side of the Tank is restraining the backfilled earth. In these situations draincoil and drainage metal must be placed directly next to the tank to ensure no hydrostatic pressure builds up against the tank wall.


An empty Elite tank will float if the local groundwater rises over 900mm from the bottom of the tank.


A standard tank can be set in the ground to within 300mm of the top of the tank wall.


If a tank is to be fully bruied a 'Flat Top' tank is required. These have a flat roof and a support pillar in the centre of the tank. Flat Top water tanks can only be buried to a maximum depth of 300mm below ground level or a maximum overburden loading of 10kpa.


Other than the earth cover, buried water tanks cannot be driven on, or take any external loading, live or static within a distance of 3.2m to the nearest edge of the tank.


Care must also be taken in high groundwater area that Hydrostatic pressure does not lift the tank.


A new above ground water tank should never be filled completely to the top in one step, this can cause stress cracks.


The recommended procedure is:


* Fill approximately one quarter.

* Leave for two days.

* Fill another quarter.

* Leave for another two days.

* Continue process until tank is filled.


This allows the reinforcing in the tank walls to expand gradually.


Partially and buried tanks can be filled in one step to the same level as the outer back fill.


InstallationOfTank InstallationOfTank2

By: HYNDS Rural