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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  • Filter Collector and Diverter for rainwater collection into water butt

    Downpipe Filter and Diverter - U32

    £49.50 Inc. VAT
    £41.25 Ex. VAT

    Combined Rain Diverter and Filter to Connect your Downpipe to your Waterbutt The 3P Filter Collector Universal is a Rainwater Diverter with built in filter, overflow and "OPEN/CLOSE" switch settings. Highly efficient, and quick and easy to install...
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    £49.50 Inc. VAT
    £41.25 Ex. VAT
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  • Rain Water Diverter with built in Filter, Switch and Overflow. Showing Colour Black.

    Downpipe Filter and Diverter - Push-fit - Black

    £38.00 Inc. VAT
    £31.67 Ex. VAT

    Combined Rain Diverter and Filter to Connect your Downpipe to your Waterbutt The 3P Filter Collector is a Rainwater Diverter with built in filter, overflow and "OPEN/CLOSE" switch settings. Highly efficient, and quick and easy to install following...
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    £38.00 Inc. VAT
    £31.67 Ex. VAT
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  • Leaf Separator Compact can be fitted at any height for easy maintenance. Available in three colours White , Silver Metallic effect and Black

    Leaf Separator Compact

    £24.50 Inc. VAT
    £20.42 Ex. VAT
    Leaf Separator Compact for Standard UK Square or Round Downpipes This Leaf Separator Compact from 3P Technik removes leaves and other debris from water passing down the downpipe, preventing them from entering the subsequent waterbutt or drainage system...
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    £24.50 Inc. VAT
    £20.42 Ex. VAT
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  • Leaf Separator, Downpipe Leaf Guard can be fitted at any height for easy maintenance.

    Leaf Separator - Downpipe Leaf Guard

    £27.00 - £33.00 Inc. VAT
    £22.50 - £27.50 Ex. VAT

    Leaf Separator Guard for Square or Round Downpipes This Leaf Separator from 3P Technik removes leaves and other debris that have travelled down your downpipe before they enter your waterbutt or drainage system. It comes complete with adapters to suit...
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    £27.00 - £33.00 Inc. VAT
    £22.50 - £27.50 Ex. VAT
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  • Rain Diverter with and without tap. Two colour options

    Rain Diverter with or without Hose Connector

    £14.50 - £26.00 Inc. VAT
    £12.08 - £21.67 Ex. VAT

    Downpipe to Water butt Connector with Built-in Simple Filter This is a universal rainwater diverter for filling water butts and rain tanks from a downpipe. There are two options, one with a tap and one without. Both are available in either Brown or Grey...
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    £14.50 - £26.00 Inc. VAT
    £12.08 - £21.67 Ex. VAT
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  • Grey Rain Water Diverter with built in Filter, Switch and Overflow.

    Downpipe Filter and Diverter - Push-fit - Grey

    £38.00 Inc. VAT
    £31.67 Ex. VAT
    Combined Rain Diverter and Filter to Connect your Downpipe to your Waterbutt The 3P Filter Collector is a Rainwater Diverter with built in filter, overflow and "OPEN/CLOSE" switch settings. Highly efficient, and quick and easy to install following...
    Qty in Cart: 0
    Price:
    £38.00 Inc. VAT
    £31.67 Ex. VAT
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  • Calmed Inlet for ensuring water collected in your rainwater tank is not disturbed by sediment at the bottom of the tank.

    Calmed Inlet - 4"

    £26.50 Inc. VAT
    £22.08 Ex. VAT
    How to Keep Rainwater Clean in Large Water Storage Tanks When you harvest rainwater, it is important to filter the water before it reaches the water storage tank. However, very small particles such as pollen and oil will often go through your filter mesh...
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    £26.50 Inc. VAT
    £22.08 Ex. VAT
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  • Overflow Siphon for a Rainwater Tank. 3P Technik Overflow Siphon Uno.

    Overflow Siphon for Plastic Water Tanks

    £79.00 Inc. VAT
    £65.83 Ex. VAT
    Rainwater Tank Overflow When you harvest rainwater, it is important to filter the water before it reaches the water storage tank. However, very small particles such as pollen and oil will often go through your filter mesh and into your storage tank...
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    £79.00 Inc. VAT
    £65.83 Ex. VAT
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  • Brown Rain Water Diverter with built in Filter, Switch and Overflow.

    Downpipe Filter and Diverter - Push-fit - Brown

    £38.00 Inc. VAT
    £31.67 Ex. VAT
    Combined Rain Diverter and Filter to Connect your Downpipe to your Waterbutt The 3P Filter Collector is a Rainwater Diverter with built in filter, overflow and "OPEN/CLOSE" switch settings. Highly efficient, and quick and easy to install following...
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    £38.00 Inc. VAT
    £31.67 Ex. VAT
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  • 3P Garden filter with integrated polyethylene dirt retention basket for roof areas up to 200m2.

    Garden Filter for Roofs up to 200m2

    £186.00 Inc. VAT
    £155.00 Ex. VAT
    Water Tank Filter for Roof areas up to 200m2 Rainwater Garden Filter for installation in rainwater tanks or before a tank in the ground with an optional locking lid and Telescopic Extension Tube. This simple filter from 3P Technik for rainwater...
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    £186.00 Inc. VAT
    £155.00 Ex. VAT
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  • 3P Retention Filter with integrated Stainless Steel dirt retention basket for roof areas up to 200m2.

    Retention Filter for Roofs up to 200m2

    £260.00 Inc. VAT
    £216.67 Ex. VAT
    Soakaway/Infiltration Crate Pre Filter for Roof areas up to 200m2 Rainwater Retention Filter for installation in rainwater tanks or before a tank in the ground with an optional locking lid and Telescopic Extension Tube. This simple filter from 3P Technik...
    Qty in Cart: 0
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    £260.00 Inc. VAT
    £216.67 Ex. VAT
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  • Filter Collector and Diverter for rainwater collection into water butt

    Downpipe Filter and Diverter - U50

    £49.50 Inc. VAT
    £41.25 Ex. VAT
    Combined Rain Diverter and Filter to Connect your Downpipe to your Waterbutt The 3P Filter Collector Universal is a Rainwater Diverter with built in filter, overflow and "OPEN/CLOSE" switch settings. Highly efficient, and quick and easy to install...
    Qty in Cart: 0
    Quantity:
    Price:
    £49.50 Inc. VAT
    £41.25 Ex. 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.