Molloy Precast Products Ltd., Tullamore, Co. Offaly, Ireland - Waste Water Solutions - Building Components - Natural Granite

Domestic AswaRain® Systems

Molloy Precast offer a range of Aswarain systems, it is important that each system is sized appropriately to enhance operation and increase cost effectiveness. Our engineers will consider your roof size, rainfall, applications and occupancy to ensure you are provided with an appropriate system. We manufacture large variety of precast tanks for a wide range of uses; this allows us to combine different sized tanks to provide you with an accurately sized system. Below are three example systems:

Sample Systems

AswaRain® H+ Cottage
	Volume: 3500 litres
	Height: 2250 Width: 1770mm
	Suited to a cottage or small house
		PDF drawing of tank and components

AswaRain® C Standard House
	Volume: 8000 litres
	Height: 2350 Width: 2340mm
	Suited to a modern family home
		PDF drawing of tank and components

AswaRain® Cx2 Large House
	Volume: 16000 litres
	Height: 2350 Width: 5000mm
	Suited to a large house with many people
		PDF drawing of tank and components

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To optimise the benefits from rainwater harvesting it is important to choose the right system. Be wise and buy the system that suits you and your needs. The following reasons are why the AswaRain® system is superior to the rest.

Engineered according to your requirements

Our domestic systems come in several different sizes. We will ensure that your system is sized to your needs.

Concrete systems are more cost effective

Precast concrete is easier to install than plastic as no concrete backfill or foundations are required. Concrete tanks are reliable with superior strength and longevity having a lifespan exceeding 50 years

Site Adaptable

We have years of experience with the installation of concrete tanks in difficult areas such as wet sites.

System Performance

Every component of the Aswarain system is selected for their quality and reliability optimising the performance of this system. At the request of the client we can provide a filtration and sterilisation kit which will clean the rainwater to body-care standards.

Testimonal

"One of our best decisions was to install an AswaRain® system. We have no more lime blockages in our cisterns, shower heads or washing machine. The soft waster has made such a difference to our hair and skin. We got expert advice and exceptional service from Molloy Precast for the duration of the project. The precast concrete tank meant that we could backfill with soil. We can now look forward to the added bonus of saving on water charges" Jody Brennan, Daingean

Applications

Molloy Precast provide Rainwater Harvesting solutions for many applications.

Our domestic rainwater recycling systems are generally used in homes or to supply small buildings.

Larger-scale commercial rainwater recovery systems are used for larger buildings such as schools, residential developments, offices or hotels.

How it works

1) Rainwater collected from roof

Rainwater is a free natural resource which you can capture, store and use in your own home whether it is an existing building or a new build. The existing roof, gutter system and downpipes on your house or/and garage can easily be used to collect rainwater. Water collected in this system flows through a pipe network into the AswaRain system.

2) Rainwater Storage

Rainwater then enters the AswaRain system which is equipped with the following; Leaf Filter – Rainwater will collect leafs and other solids from the roof and gutter system which need to be removed. A leaf filter is fitted on the inlet pipe, this collects all gross solids preventing them from contaminating the stored water; Calmed inlet – Dissolved solids such as sand and grit will be carried into the system, these pass through the leaf filter unaffected, however, they will settle to the bottom of the tank, hence not affecting the quality of the outflow. To prevent the inrush of water from disturbing these solids a calmed inlet is installed on the inlet pipe.
Submersible pump – Rainwater is pumped from the tank into the house, this pump is positioned off the floor of the tank to prevent the settled dissolved solids from contaminating the house supply; Tank – Every Aswarain system includes a Molloy Precast concrete tank, which has several advantages over plastic systems. There is a variety of tank sizes available, it is important that the tank size chosen is suitable for your house. Our engineers will design an appropriate system considering the roof size, rainfall, rainwater application and occupancy. Underground Precast Concrete Tank

3) Water pumped to House

Water is either distributed into throughout the house using a gravity system or a pressurised system. The gravity system includes a header tank positioned into the attic, the rainwater is pumped from the Aswarain tank into the header tank. From hear it flows via gravity to each application within the house. The pressurised system eliminates the need for the header tank however a pressure vessel is required to maintain a consistent pressure in the subsequent pipe network.

4) Filtration and Sterilisation Option

Gross and suspended solids are removed by the Aswarain system, however, other contaminants remain in the rainwater such as colloidal solids and pathogens. This water is perfectly suitable for use in toilets, irrigating gardens and for washing cars. Molloy Precast offer an optional treatment system which will produce a water suitable for use in cloths washing machines, and as hot water for showers and sinks. This treatment system filters out solids and subsequently sterilises the rainwater using the following equipment:
Inlet pipe – Rainwater is pumped from the Aswarain system into the treatment system
Pressure vessel – This device ensures a consistent pressure is maintained through the subsequent equipment and hence pipe network. This will reduce the risk of damage to these and other devises connected to the system
Course and fine filter – This system removes all colloidal solids from the rainwater ensuring the UV light operates to its maximum potential.
UV light – The UV light kills all pathogens in the rainwater providing a clean treated water supply. Sterilisation is instant and is not residual, meaning that contamination can occur further down the pipe network. Therefore the outflow from this system should be fed directed into the appliance and not stored in a header tank.

Filtration and Sterilisation of Rainwater

5) Excess water to Soak Pit

Excess water collected in the Aswarain system is allowed to overflow out of the system, this will remove floatable solids from the tank and prevent the system from overflowing. The excess water is piped into a soak pit or alternative storm water collection system depending on your house.