Installation and Care

Here are some guides and information about installing our water tanks, preparing for an install, and maintaining your tank for optimal performance.

Dry System

In most cases, tank installations use PVC storm-water pipes to carry rainwater from the gutter to the tank inlet (see dry system diagram). Connecting the PVC pipe is hassle-free, and it should be glued with watertight cement. PVC pipes are inexpensive and neat and can be painted to match the colour of your home.  Alternatively high-density polyethylene (HDPE) pipe may be used.

The downpipe should be directed to run downwards and the rainwater should flow into the top of the tank. There should be enough fall in the pipe to allow gravity to drain water into the tank inlet.

A first flush water diverter and/or a rain head can be used to keep sediment and leaves out of the tank. Called a dry system, the pipes are allowed to dry out once rain stops.

Wet System

A wet system (see diagram), where water remains in the pipes after rain, connects one or more underground downpipes and carries water through an underground pipe to the tank. Wet systems rely on hydraulic head pressure to force water through sealed pipes and up into the tank inlet.

A wet system is useful for a larger roof catchment area, as the tank does not need to be located near the downpipe.  It is imperative to consider the height differential between the bottom of the gutter and the top of the tank. Allow at least 500mm differential. You can use our Ask an Expert service for more information about wet systems.

An important consideration is to use a filter before water enters the underground storm-water pipes. We recommend installing a first flush or a High-Flow Filter and/or Rain Head under the gutter. Inspection points should also be installed to allow a flush out, if required. Gutter guards are effective for keeping your wet system free flowing.

Well-designed systems, like Kingspan Water tanks, are low maintenance. All rainwater systems need to be monitored to ensure your drinking water is safe for your health and for the tank’s longevity.

With a regular low-key monitoring and maintenance plan you will generally prevent problems occurring.

Your Kingspan Water tank is made from strong steel and internal polymer coating, and is not susceptible to UV radiation, making it long lasting.

Regular maintenance is simple. We recommend you fully inspect your tank at least every 3 months.

  • Inlet screen should be clean, free of leaves and debris
  • Clean gutters regularly, ensure water does not stagnate in gutters as this causes algae blooms
  • Clean the first flush water diverter regularly
  • Inspect your tank regularly to ensure mosquito screens and light guards are working effectively.

Kingspan Water recommends that a full flush of all the tank water should be completed every 3-5 years.

Algae or smelly water should be always be treated to ensure it is safe to drink. We recommend Davey Aquasafe Liquid Solution. In severe cases, completely flush the tank or use a professional tank cleaner to service your tank.

You can download a copy of our user manual which contains step by step guides to maintaining your water tank.

Kingspan Water User Manual Thumbnail

Kingspan Water User Manual

A well-designed rainwater harvesting system can save up to 40% of water over normal household mains water consumption, making it cost-effective and saves precious water.

It is mandatory, in some states of Australia, to install rainwater tanks to supply toilet flushing, bathing, garden watering and washing machine for all new homes or renovations.

If this is applicable in your area, we recommend a mains water backup controller for seamless switching to mains water when tank water is exhausted or for power failures. These automated backup devices allow uninterrupted access to water.

Tank Base Preparation

This brief guide for base preparation should be followed to ensure a correct foundation is laid for your AQUAPLATE® tank. Damage to your tank due to failure or movement of the tank base is not covered by the warranty. Please keep in mind that 1000L of water weighs 1000kg, and this is a significant force. Soft ground may subside under the weight of a full tank.

The base of your tank is made with double sided AQUAPLATE® i.e. the inside and outside of the tank base is coated with a polymer film to prevent corrosion. The tank may be in direct contact with the tank base and the tank will not corrode. Hence there is no reason to elevate the tank above ground level.

This base preparation guide should be taken as a guide only. Specific details on the construction of a tank base should be referred to an engineer for formal advice. Kingspan Water accept no responsibility for the failure of a tank base.
Stand Concrete Paver Base Concrete Base Crusher Dust Base
Stand Base Stand Base Stand Base Stand Base
Stand construction must be certified as strong enough to support the tank’s weight. Consult a structural engineer to ensure the construction and footing is sufficient for the tank. The top of the stand must be flat, smooth and level. Tank stands may be made with varying leg lengths to accommodate a sloping site. Kingspan Water tank stands are available to suit a range of tanks. To use a concrete paver base, the area must be cleared down to firm earth. A paver base installed on soft ground (i.e. a garden bed) will subside over time, and is not advisable. Once dug down to a firm surface, spread sand and cement mix 75mm thick over the entire base, level out then proceed to place concretepavers flat on top. Once laid, shower the pavers with water to set the sand and cement off. Paver base is to be large enough to support all edges of the tank. Tank may be placed on to paver base straight away. Do not fill tank above 2 corrugations for at least 48 hours. A concrete slab base is the most suitable base for your AQUAPLATE® rainwater tank. Construction of a concrete base needs a minimum of 100mm thick concrete and F62 mesh, on a flat level area. If the tank is to be positioned in an area that is on a slope then the thickness of the slab is to be increased and the mesh to be a higher grade. The slab must be flat, smooth and level. Finish with a metal trowel is advisable. Slabs must be large enough to support all edges of the tank, and should be at least 100mm longer and wider than the tank. Slabs must be allowed to cure for at least five days prior to placing tank on slab. Crusher dust bases are only suitable for larger diameter round tanks. The crusher dust must have no particles larger than 5mm diameter. The crusher dust is to be 100mm thick. It must be compacted, level and flat. A border must be placed around the crusher dust to ensure it does not erode over time or is undermined by heavy rain or burrowing animals. The base should be large enough to support all edges of the tank. Tank may be filled straight away. Coarse aggregate should be spread over any exposed crusher dust, after the tank is positioned, to prevent erosion.

Note: Care must be taken when positioning the tank on a crusher dust base to ensure it does not dig in and create an uneven surface.
Kingspan Water Tank Base Preparation Thumbnail

Kingspan Water Tank Base Preparation

Can't find the information that you need?

Get in touch with our friendly team and they'll happily guide you through any questions that you might have regarding our water tanks.

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