External Underground Filter for Roofs under 500 m²

ETF06 Plasteau external underground filter (Reference: ETF06) is the ideal professional solution for filtering roof water effectively for areas up to 500 m². Designed by Plasteau, a recognised specialist in rainwater harvesting systems, this external filter ensures water of optimal quality for your domestic and professional uses.

Benefits and use cases

The ETF06 filter is aimed at private and professional users with a roof area of less than 500 m² who want to improve the quality of the rainwater they collect. It is perfectly suited to detached houses, small commercial buildings, workshops and sheds of moderate size.

This external filtration system is ideal for improving an existing installation that has no built-in filtration, or for usefully completing an Ecobase tank. It removes impurities, leaves, moss and roof debris, ensuring clean water for watering, washing or technical uses.

Installing it underground preserves the appearance of your property while protecting the system from changes in the weather and from vandalism. This underground arrangement also gives the equipment a longer service life.

Technical features and innovation

The filtration vessel is made of high-density polyethylene, a material recognised for its resistance to knocks, to corrosion and to UV. This construction ensures exceptional durability even in the most demanding underground conditions.

The secured lid closes with a quarter-turn system backed up by a security screw, ensuring a perfect seal and preventing any unauthorised access. This double security protects the filtration system while keeping maintenance easy.

The main innovation lies in the self-cleaning stainless steel filter with a 1 mm mesh. This technology allows fine, continuous filtration without frequent manual intervention. The stainless steel ensures resistance to corrosion and the longest possible life for the filtration system.

The three PVC sockets, 110 mm in diameter, with built-in seals, ensure tight, lasting connections: inlet from the gutter, outlet to the storage tank and safety overflow. This arrangement allows complete management of the water flows.

Installation and use

Installing the ETF06 filter calls for suitable excavation with a stabilised base and careful backfilling. The vessel must be positioned between the gutter downpipe and the storage tank, respecting the falls needed for gravity flow.

The connection is made on standard 110 mm PVC pipe, which makes it easy to integrate into any existing harvesting system. The outlet to the tank, configurable on the right or the left, offers remarkable flexibility of installation, adapting to every site layout.

The principle is simple: the rainwater enters from above, passes through the stainless steel filter which holds back the impurities, then comes out clean towards the storage tank. The debris collects in the lower part and is removed during the periodic servicing.

Servicing consists mainly of cleaning the stainless steel filter twice a year and emptying out the accumulated debris. The quarter-turn system makes access easy for this maintenance work.

Tips, combinations and expert advice

To get the most out of the ETF06 filter, we recommend cleaning the gutters beforehand and checking the condition of the roof. Removing the moss from the roof covering once a year will considerably reduce the load of dirt and lengthen the intervals between filter servicing.

Pairing it with an Ecobase Plasteau tank creates an optimised harvesting system. This combination ensures water of superior quality and simplifies the overall management of the installation. Remember also to size your storage tank correctly according to your consumption and the local rainfall.

In the event of prolonged frost, the underground position of the filter protects it naturally. In very cold regions, however, additional insulation may prove necessary. Adding a backflow preventer or a draining system makes winterising easier if required.

For building professionals, this external filter offers a turnkey solution for enhancing ecological construction projects. Its universal compatibility makes it possible to integrate it into any existing system, creating added value appreciated by clients who care about the environment.

Technical specifications