- Remove the top cover for access to the OPV – see detailed instructions.
- At arrow position 1, loosen the nut by turning it counter-clockwise until it reaches the coupling at arrow position 2.
- Turn the coupling at arrow position 2 clockwise into the elbow to increase pressure, and counter-clockwise away from elbow to decrease pump pressure.
- Once completed, tighten the nut at arrow position 1 so that it tightens up against the elbow.
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