Rainwater Harvesting Diverters & Filters

How to Filter Rainwater from a Roof

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When you collect water from your roof it is important to ensure that it is filtered before it is stored in water tanks so that it is as clean as possible and doesn't go sour or smelly before you use it.

This article explores the four main components you need if you want to use the rainwater in non-potable situations in a professional Rainwater Harvesting System, whether the water is stored in an above ground tank or one buried in the ground. (Extra steps will need to be taken if you want to further filter the rainwater for drinking). Read about the four steps of Rainwater Harvesting.

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  • Calmed Inlet for 6" pipes for ensures water collected in your rainwater tank is not disturbed by sediment at the bottom of the tank.

    Calmed Inlet - 6"

    £96.00 Inc. VAT
    £80.00 Ex. VAT
    How to Keep Rainwater Clean in Large Water Storage Tanks Ideal for use in large-scale rainwater harvesting installations. It is suitable for DN150 plastic pipe (6" pipe). Max outer dimension of pipe...
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    £96.00 Inc. VAT
    £80.00 Ex. VAT
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  • Duo Overflow Siphon for thick walled Rainwater Tanks.

    Duo Overflow Siphon

    £92.99 Inc. VAT
    £77.49 Ex. VAT
    Duo Overflow Siphon for thicker walled Rainwater Harvesting Tanks The Duo Overflow Siphon design has a built in rodent and odour barrier. It is best used in thicker walled rainwater harvesting tanks...
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    £92.99 Inc. VAT
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  • 3P Basic Overflow Siphon with Circular Sprung Steel Rodent Barrier

    Basic Overflow with Circular Sprung Rodent barrier

    £68.99 Inc. VAT
    £57.49 Ex. VAT
    Basic Rainwater Tank Overflow with Odour Trap and Rodent Barrier The 3P Basic Overflow Siphon has a rodent barrier made of sprung stainless steel. This prevents small animals from entering your tank...
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    £57.49 Ex. VAT
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  • 3P Irrigation Flat Filter for filtering rainwater from roofs upto 800m2.

    Irrigation Flat Filter for Roofs up to 800m2

    £549.36 Inc. VAT
    £457.80 Ex. VAT
    Water Tank Filter for Roof areas up to 800m2 Rainwater filter for large roof areas and large rainwater tanks. The 3P Irrigation Flat Filter is installed in the rainwater storage tank and has no...
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  • Twin Filter for Industrial Rainwater Harvesting Installations.

    Twin Filter for Roofs up to 800m2

    £720.00 Inc. VAT
    £600.00 Ex. VAT
    Water Tank Filter for Roof areas up to 800m2 Rainwater filter for installation before rainwater tanks as part of a large rainwater harvesting filter system. Install either in an underground chamber...
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    £720.00 Inc. VAT
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Celtic Water is a trading style of Celtic Sustainables Limited. Celtic Sustainables Limited is a company registered in England and Wales with company number 4071622 and registered office at Unit 3 Parc Teifi, Cardigan, Ceredigion, SA43 1EW.