The 3BB-WOF is a three stage Big Blue 20" filtration housing system that comes without filter cartridges, allowing you to customize the unit. It is used for whole house and light commercial water filtration situations. The three filter housings are mounted on a steel bracket and include 1" threaded inlet and outlet ports with pressure relief valves. *Filters not included
 
 STAGE 1 - Sediment Filter 5 mic (155358-43) – Replace every 6-12 months
 STAGE 2 - Carbon Block Filter 10 mic (155783-43) – Replace every 6-12 months
 STAGE 3 - Carbon Block Filter 10 mic (155783-43) – Replace every 6-12 months
 
Specs
Filter cartridges not included
Three Stage System
Holds Big Blue style 4.5" X 20" filter cartridges
1" threaded inlet and outlet ports with pressure relief valves