The first 2521 facility was realised in Alblasserdam. It was build within one year, to replace the existing pool Blokweer. The adjacent located sports hall was preserved. It was opened on October 11^th 2014 by triple Olympic champion Pieter van den Hoogenband.

The 2521 pool was build adjacent to the existing sports hall, connected by one new entry. Thus made it possible to use the old and the new part as one new sports complex. On the first floor the bar was connected to the spectator stand of the sports hall. The material and colours of the swimming pool where accurately tuned to the existing sports hall and surrounding dwellings.