Abstract: A water filtration assembly (10) includes a first end cap (34) covering the first end of a housing (12) and a second end cap (36) covering the second end of the housing (12). The end surface (40) of each end cap (34 and 36) has a L-shaped cap recess therein with an axial leg (42) and a transverse leg (44) extending about the end face. A projection (30) at the first end of the housing (12) is disposed in engagement with the cap recess of the first end cap (34) as the end surface (40) of the first end cap (34) abuts the recess end surface (28) at the first end of the housing (12). In the same fashion, a projection (30) at the second end of the housing (12) is disposed in engagement with the cap recess of the second cap (36) as the end surface (40) of the second cap (36) abuts the recess end surface (28) at the second end of the housing (12). The end caps (34 and 36) are formed with a two sided shoulder (46) filling the corner between the axial (42) and transverse (44) legs of the cap recess.