SpringWell FS1 Installation Instructions Manual page 7

Now connect the pre-filter housing head to the mounting
bracket with the hex bolts provided.
Plumb the water from the main water supply into the Inlet
side of the pre-filter head (follow the arrows for water flow).
Install lubed o-ring in groove on top of the blue pre-filter
housing.
Unwrap pre-filter and install it onto small pipe stand inside
the housing.
Screw the housing to the head as tight as you can without
the pre-filter housing wrench. Now take the wrench and
tighten down hand tight.
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