Rainwater system 100 liter tank with automatic switch to tap water for supplying gardens, washing machines, toilets... according to standards EN 1717 cat. AB. Very reliable, designed for easy use and installation. Belgaqua approved. The ERCU MAXI - ASPRI 25/4 is equipped with an ESPA ASPRI 25/4 pump. The ERCU MAXI LOAD - GXR/RM9 - ASPRI 25/4 is equipped with an ESPA ASPRI 25/4 pump and a Calpeda GXR/RM9 submersible pump as the advance pump. The ERCU MAXI F - METASMALL is equipped with a frequency controlled Calpeda METASMALL pump. The ERCU MAXI F LOAD - GXR/RM9 - METASMALL is equipped with a frequency controlled Calpeda METASMALL pump and a Calpeda GXR/RM9 submersible pump as the advance pump.