Watts’ Big Bubba S100 is a complete whole-home filtration system. This certified point-of-entry system gives plumbing contractors a solution for homeowners concerned about lead, PFAS, cysts and chlorine taste and odor in their drinking water. Big Bubba is certified to reduce 99.62% of lead and 98.26% of PFAS in drinking water (at a maximum of 4 gpm), Watts notes.