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Rainwater filters and diverters
Want to get up to speed on rainwater collection read Which Rainwater Downpipe Filter, Diverter or Water Butt connector to find out more.
Often referred to as many things: Downpipe leaf filters, Waterbutt connectors, Rainwater Diverters, First Flush and Self Clean Filters....On this page you’ll find all of our rainwater filters and diverters.
In rainwater harvesting systems water flows from the roof down a downpipe (drainpipe) to the water butt, where it is stored. Diverters are the pipes used to connect the downpipe to the water butt. The most basic are used to divert water only only, whilst others also filter the water they divert.
Filtration is an integral part of rainwater harvesting systems. Filtration typically removes contaminants such as dust, leaves and organic debris from water butts, tanks and IBCs. Even if the water isn’t being used for drinking it is useful to remove these contaminants as they can cause blockage in the downstream system in the long term. If your diverter does not filter the water, you can place a filter somewhere else in the system − such as on the downpipe and/or in suction inlet of your pump.
Broadly speaking, rainwater diverters fall into one of these categories:
- Basic diverters, also known as water butt connectors. These offer no filtering capability. This type of diverter can often throttle the flow of water and does not offer a high capture efficiency. However, the basic diverters we offer do not suffer from these problems.
- ‘Capture all’ filters come by many names, including downpipe filters, downpipe guards, downpipe leaf catchers, downpipe leaf traps, and downpipe leaf filters. These all capture coarse debris, leaves etc. In all of these maintenance of the filter is required to remove the debris.
- Self cleaning downpipe filters are an elegant means of filtering debris before it enters the water butt. They use the flow of water to clean the debris from the filter.
- First flush filters divert and flush the first water which enters the system when the rain starts pouring. This is because this first water is always the most contaminated by leaves, dust and other materials on the roof.
For more information, see this post.

3P Rain Collector Downpipe Water Butt Filter
£29.00
The Rain Collector's coarse filter slats separates the debris from the clean rainwater coming off the roof. The debris is passed forward down the downpipe whilst clean water is passed to the water butt. Suitable for collecting rainwater from typical domestics roof areas up to 50m2. Fits round downpipes 68mm to 100mm and some smaller sizes. The...

3P Rainwater Filter Collector Universal for Downpipes
£49.00
3P Rainwater Filter Collector Universal 3P Technik make high quality rainwater harvesting accessories, and this is a great addition to their range of products. It is a downpipe diverter which thoroughly filters the water which passes through it. This will ensure that the water in your water butt is as pure as possible. Like all diverters ...

Commercial Rainwater Harvesting Filter - 1 stage -110mm - PF-200m2
£359.00
A Rainwater filter for installation in rainwater tanks. Due to the inclined angle of the filter sieve and its very smooth surface structure the dirt is rinsed into the sewer. Filter cartridge mesh is stainless steel within plastic housing. Optional 3P Back-washing Device. The 3P Patronen Filter is ideally suited for use in conjunction with a 3P ...

Commercial Rainwater Harvesting Filter - 1 stage - 110mm CF -150m2
£209.00
*The product has been changed from Blue to Black* 3P Technik’s smallest rainwater filter for installation within rainwater tanks. The 3P Compact Filter is ideal where there is little room and no height difference available between inlet and outlet. Optional 3P Back-washing Device. The 3P Compact Filter is ideally suited for use in conjunction wi...

Commercial Rainwater Harvesting Filter - 2 stage - 110-160mm TF - 800m2
£849.00
Rainwater filter for large roof areas including commercial, agricultural and industrial use. The Twin Filter can be installed in chambers underground or directly on the wall kept frost free. Usually installed in standard 1000mm manholes. The filter could also be pre-installed in chambers prior to delivery to site. Due to its two step cleaning sy...

Commercial Rainwater Harvesting Filter - 2 stage - 110mm VF1 - 450m2
£289.00
The VF1 rainwater filter can be installed within a rainwater tank or before the tank in the ground. The VF1 has a high level of filtering efficiency due to its two step cleaning step, independent of flow rate. Due to the steep inclination of the filter cartridge the dirt is continuously cleaned away into the sewer. The VF1 is frost resistant an...

Commercial Rainwater Harvesting Filter - 2 stage - 110mm ZF -200m2
£289.00
Rainwater filter for installation in rainwater tanks. Two step cleaning system. The first coarse filter mesh protects the second, finer mesh by removing larger leaves and particles. Optional 3P Back-washing Device. The 3P Zisternen Filter is ideally suited for use in conjunction with a 3P Overflow Siphon and the 3P Calmed Inlet. This package is ...

Ecosoft 10" Cartridge Filter Triple set
£99.00
The Ecosoft 10" triple set self is perfect for high level filtration in rainwater harvesting and other water purification applications. Prestige Rainwater Trio has three 10" cartridge filters in series: first stage includes a coarse 60 micron filter. second stage refines the filtration to 20 micron thanks to a wound polypropylene cartri...

GutterMate Gutter Leaf Filter, Gutter Leaf Guard and Diverter
£49.00
The only rain water diverter and saver that diverts and filters all the rainwater before it enters the water butt, tank, drain or soakaway. The diverter then automatically shuts off the flow to the water butt when full. Collecting rainwater with the GutterMate is both simple and efficient, whether you are saving rainwater to a water butt, tank ...

Hydra-Rainmaster Duo Rainwater Filter
£189.00
The Hydra Rainmaster Duo self cleaning rainwater filters are perfect for high level filtration in rainwater harvesting applications. The Hydra Rainmaster Duo has a counter-current self-cleaning first stage with a stainless steel net cartridge and filtration degree of 90 micron. The final stage provides treatment using granulated activate...

Hydra-Rainmaster Trio Rainwater Filter
£219.00
The Hydra Rainmaster Trio self cleaning rainwater filters are perfect for high level filtration in rainwater harvesting applications. The Hydra Rainmaster has a counter-current self-cleaning first stage with a stainless steel net cartridge and filtration degree of 90 micron. The second stage refines the filtration to 25 micron thanks to a ...

Hydra-Rainmaster Trio Rainwater Filter SPARES
£69.00
Hydra-Rainmaster Trio Rainwater Filter SPARES. Purchase the Hydra-Rainmaster cartridge inserts using the drop down to select. Stage 1 - 90 micron steel. Stage 2 - 25 micron nylon. Stage 3 - 10 micron Carbon block
Lindab Galvanised Steel Round Rainwater Diverter

Lindab Galvanised Steel Round Rainwater Diverter
£66.00
With an outlet that can be opened or closed, this steel round rainwater diverter allows rainwater to be directed into The steel construction is galvanised with magnesium zinc alloy, in turn reinforcing it with durability and resilience against damage from corrosion and rust. Lindab's Magestic range of rainwater products is tested to Internation...

Monjolin Smart Rain Water Filter 100m2
£239.00
The Monjolin Smart Rain Water Filter represents a step change in rainwater filter for the serious rainwater harvester. The Monjolin Smart Rain Water Filter differs from standard RW filters which suffer from a reduction in yield at higher flows. The Monjolin increases contact time during higher flows allowing high yield at high storm intensitie...

Monjolin Smart Rain Water Filter 200m2
£299.00
The Monjolin Smart Rain Water Filter differs from standard RW filters which suffer from a reduction in yield at higher flows. The Monjolin increases contact time during higher flows allowing high yield at high intensties perfect to capture intense summer storms. The other major benefit is that the Monjolin filter is 60 microns which is signific...

Prestige Rainwater Cartridge Filter Trio
£99.00
The Prestige Rainwater Trio self is perfect for high level filtration in rainwater harvesting and other water purification applications. Prestige Rainwater Trio has three 10" cartridge filters in series: first stage with a stainless steel net cartridge and filtration degree of 60 micron. second stage refines the filtration to 20 micron t...

Rain Collector Avanti speedy fit water butt diverter for circular downpipes
£35.00
Rain collector Avanti rapid fit diverter This smart device allows you to fit a water butt diverter with minimal messing around with the downpipe. Conventional downpipe filters and water butt connectors require 2 cuts in the existing downpipe with the filter or diverter sitting in line with the downpipe. This nifty innovative device allows the ...

Rain Collector Rapido fit Quattro water butt diverter for rectangular and square downpipes
£39.00
Rain collector Rapido Quattro Rain collector for filling rainwater containers This smart device allows you to fit a water butt diverter with minimal messing around with the downpipe. Conventional downpipe filters and waterbutt connectors require 2 cuts in the existing downpipe with the diverter sitting in line with the downpipe. This nifty inn...

Rain Collector Speedy fit water butt filter for circular downpipes
£69.00
Rain collector Speedy This smart device allows you to fit a water butt diverter with minimal messing around with the downpipe. Conventional downpipe filters and water butt connectors require 2 cuts in the existing downpipe with the filter or diverter sitting in line with the downpipe. This nifty innovative device allows the downpipe to be cut ...
Rainus Downpipe Filter Leaf Ejector
£139.00
The Rainus is a downpipe filter made by 3P Technik. When attached to a downpipe, it filters all detritus from rainwater such as dirt and leaves, allowing clean water to pass through to the water butt. It is available either in grey and green, or in brown and green. It is well suited for use as a primary filter for soakaways, infiltration systems...