Frequently Asked Questions

How much rain do WISY filters collect?

Rain Intensity and Roof Size The percentage of rainfall WISY-Filters are collecting (which is their efficiency) is depending on the amount of water coming through the pipes. During heavy rainfall (with lots of water coming) the efficiency is lower than during a light drizzle. Also the connected roof size has ...

What is the right filter size for my roof?

Temperate climate zone or tropical climate? The roof area that can be connected for rainwater harvesting depends on the local rainfall, as for example in the tropics significantly different values are to be expected than in temperate climate regions. But there are also considerable differences within a climate zone. The ...

What is the diameter of my rainwater downpipe?

Measure at the correct height To determine the diameter of your downpipe, measure approximately at the height at which the rainwater filter is to be installed. In this way, you avoid determining an incorrect value for slightly conical downpipes. Using the caliper gauge to determine the diameter The diameter can ...

How to remove the filter insert of the vortex fine filter

Watch here how the lifting handle can easily be used to remove and replace the filter insert from the WISY Vortex Fine Filter. Do not store the handle inside the filter housing, otherwise the water flow might be interrupted.

How do I clean the WISY filter insert the easiest?

After prolonged use, a biofilm can form on the filter mesh. It can be easily removed with one of the following measures: Cleaning in the dishwasher: Cleaning in the dishwasher is very effective. First, remove the deposits on the stainless steel mesh with a brush, warm water and some detergent. ...

How do I vent and remove a submersible pump from the cistern?

Do NOT lift the submersible pump by the cable. Lift submersible pump with support cable and secure against tipping over. BEFORE commissioning, place submersible pump horizontally under water to vent. Flush the pipeline FIRST, and only then connect the submersible pump to the house piping system.

Why does my pump switch on and off all the time?

Constantly switching pump: If the pump of your rainwater system starts and stops at very short intervals, the cause may be a leak in the connected piping system. For example, a running toilet flush, a dripping tap or a leaking lawn sprinkler. In this case, the pump controller registers the ...