Spanner for Big Blue Filter (4.5×10″)

Big Blue Water Filter Housing Service Spanner Used to open the sump on Big Blue water filter housings.

Available in 3 sizes , Pentair 10″ big blue(SW3) , Pentair 20″big blue (SW4) and NON Pentair (Royal Blue) big blue vessels

Made from high quality durable plastics.

A filter housing spanner is an essential tool for opening a filter housing after it has been sealed for a period of time.