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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
£26.99
The Rain Collectors 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 many sizes in between in...

3P Rainwater Filter Collector Universal Downpipe Filter
£49.99
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 on...

Commercial Rainwater Harvesting Filter - 1 stage -110mm - PF-200m2
£289.00
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
£199.00
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 with a 3P Overflow Siphon and the 3P Calmed Inlet. L...

Commercial Rainwater Harvesting Filter - 2 stage - 110-160mm TF - 800m2
£649.00
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 sys...

Commercial Rainwater Harvesting Filter - 2 stage - 110mm VF1 -450m2
£259.00
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
£249.00
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 ...
Floating Intake- Rainwater Pump Filter

Floating Intake- Rainwater Pump Filter
£39.00
The floating intake allows rainwater to be collected just below the surface of the water. This prevents any floating debris to enter the pump suction hose. Debris tends to either fall to the bottom of the tank or float on the surface. A floating intake allows the rainwater to be drawn from middle portion of the available water. Since the intake...

GutterMate Gutter Leaf Filter, Gutter Leaf Guard and Diverter
£29.99
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
£149.00
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
£189.00
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

Hydra-Rainmaster Trio Rainwater Filter SPARES
£43.00
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

IBC coarse mesh inlet lid filter with threaded collar
£29.00
Prestige Water IBC coarse mesh basket filter developed for commercial, farming and irrigation applications to remove debris from rain water and other liquids prior to entering the IBC or other style of liquid tank or container. The housing and mesh are made from high grade stainless steel materials. The housing is extremely solid and suitable ...
IBC fine mesh inlet lid filter

IBC fine mesh inlet lid filter
£79.00
Prestige Water IBC fine mesh basket filter developed for commercial, farming and irrigation applications to remove debris from rain water and other liquids prior to entering the IBC or other style of liquid tank or container. The housing and mesh are made from high grade stainless steel materials. The housing is extremely solid and suitable fo...

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
£29.99
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
£44.99
Rain collector Speedy 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 filter or diverter sitting in line with the downpipe. This...

Rain Collector Speedy fit water butt filter for circular downpipes
£54.99
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
Rainus Downpipe Filter
£89.00
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...

Regendieb de Luxe water butt connector - Self cleaning Rainwater Filter for downpipes
£39.00
This is the Regendieb de Luxe Self cleaning circular downpipe filter which showcases simple and innovative German design. This represents a step change in rainwater harvesting diverters since the diverter filters leaves and other contaminants whilst capturing the majority of rainwater. This principle is shown in image 2. >>This model...

Regendieb Original Selfcleaning Rainwater Filter and Rain Diverter - downpipes
£54.99
This is the Graf (Garantia) Regendieb (Rain thief) Self cleaning circular downpipe filter which showcases simple and innovative German design. This represents a step change in rainwater harvesting diverters since the diverter filters leaves and other contaminants whilst capturing the majority of rainwater. This principle is shown in image 2. ...

Regendieb Pro Rainwater Harvesting Self Cleaning Filter
£59.00
This is GRAF self cleaning circular downpipe filter showcases innovative German design. This represents a step change in rainwater harvesting diverters since the diverter filters leaves and other contaminants whilst capturing the majority of rainwater. This principle is shown in image 1. The downpipe filter is supplied with an outlet adaptor a...

Telescopic Extension for VF1 and Garden Filters
£89.00
The Telescopic Extension Tube from 3P Technik extends the height of a selection of their Rainwater Harvesting Filters from a minimum of 250mm to up to 750mm. It works with: 1000595 - VF1 Filter, 1000592 - VF1 Combi Filter, 1000630 - Retention Filter, and 1000600 - Garden Filters for underground installation Multiple Extension Tubes can be conn...
Ward Water butt connector - optional 3m extension hose
£10.99
Strata Ward Water Butt Filler Kit This is Strata Ward Water Butt Filler Kit which showcases innovative UK design. This item diverts the rainwater direct from your downpipe into your water butt to keep it full! To fit standard round and square down pipes up to 68mm outside diameter The Kit contains the following items: 1 x Downpipe rainwater...

Water butt connector - Quattro rainwater downpipe self cleaning filter
£20.99
This self cleaning downpipe filter showcases simple and innovative German design. This represents a step change in rainwater harvesting diverters since the diverter filters leaves and other contaminants whilst capturing the majority of rainwater. This principle is shown in image 2. This model also comes with the linking kit (Image 5) wh...