We would not place the filter before the pump for two reasons. If it fills with debris it would cause the pump to lose its prime. If not properly sealed during maintenance it would allow air to get into the suction line. Neither would be a good thing.
Of course we do filter the suction line with a foot valve. However, this filter is much more course (1/4" or 1/8" holes) than the filter out in the field. We are just keeping out larger debris that could hurt the pump.
: Should a disc-type filter be placed before or
: after the pump. I'm concerned about debris
: going through the pump and over time
: damaging the impeller, so I wanted the
: filter before the pump, but didn't know if
: it would work with suction as opposed to
: pressure (after the pump)?