Trebor 610R Magnum - Manual (Page 6)

PAGE 6 MAGNUM 610R PUMP OPERATION / MAINTENANCE MANUAL
Figure 1-2

Turn adjustment screw clockwise (CW) to increase backpressure.

Turn adjustment screw counter-clockwise (CCW) to decrease backpressure.
NOTE: Loosen locking nut prior to making adjustment, then re-tighten nut to
maintain adjustment.