3	Return Line - Suction Filters
4	Pressure Filters Change over
5	Pressure Filters PN < 1451 psi
6	Pressure Filters PN > 1450 psi
7	Stainless Steel Pressure Filters
8	Filter Battery
9	Off-Line Filters
11	Suction Filters
12	Breather Filters
14	Spin-On Filters
15	Clogging Indicators
16	Accessories
18	Specifications
19	Interchange Elements