11
Do not overfill the glass reservoir. The glass reservoir does not withstand high pressure but it is not
pressurized when PGHH is used correctly. Do not add fluid to the glass reservoir when increasing
pressure. The reservoir may overflow and explode when the pressure is released and all the excess
fluid returns from system to the reservoir.
Do not use the pump if the reservoir is damaged.
13. If operated with distilled water, the reservoir must be emptied after each use by
removing the drain screw from the bottom of the reservoir (see figure 5).
2.2 Reservoir (fluid level)
If the fluid level in the reservoir falls considerably during use, a partial vacuum can be
created in the reservoir, which may affect the pump performance. To avoid this, simply
allow air to enter reservoir by partly unscrewing the filling plug (5 in figure 1).