Delta Pi battery line is a wide group of fittings created with attention to every detail. It is distinguished by the quality of workmanship and the functional solutions used. The big advantage of the Pi line is its availability in 7 most fashionable colors: Chrome, white matte, black matte, gold gloss, gold brushed, copper brushed and the latest graphite brushed. The name Pi is derived from numbers π, and it stands for the size proportion between the sizes of the important elements of each faucet, e.g., body length/ handle length, etc. Thanks to this natural proportion used intuitively since ancient times, the Pi line of faucets impresses with a consistency of appearance that is the result of mathematical logic hidden already at the design stage. The PI faucet line is patented and protected throughout the European Union. The Delta Pi bathtub spout is made of brass and has a spout overhang of 185 mm, so it can be successfully used to fill most bathtubs from Excellent's range (the minimum spout length of a wall mixer is given in the table characterizing each bathtub). It has a Neoperl aerator.