→ Filter vessel pistons are designed specifically for use with filter vessels, and are not
interchangeable with reaction vessel pistons. Always check you are using the correct piston for
your application.
With the assembly still inverted, check that both
pre-fitted O-rings are fully seated inside the thread
of the filter plate.
Carefully insert the flanged end of the BOV glass
body into the threaded section of the filter plate
until it fully engages with both O-rings.
Hand-tighten the red Rodaviss screw cap.
Screw the piston cap further until the O-ring seal at
the top of the piston engages with the filter plate.
Continue tightening until you feel resistance,
indicating that the valve is in the closed position.
Turn the filter plate and BOV piston assembly the
correct way up and place it on the filter support
plate.
Use the inner curved ridge on the support plate
as a guide as to where the filter plate assembly
should sit.