Big One is a unique polypropylene housing for professional applications where high performances and reliable products are needed. Designed to treat high quantity of water, it’s a two-pieces compact container, that can fit 23” and 40” filtering elements. The housing is made with 3” female In-Out threading without brass inserts, and it’s equipped with, plastic drain plug and plastic relief valve. Big One is provided with a stainless steel clamp that enable to open and close (easily and quickly) the housing during maintenance operations. The housing is individually packed in carton box.