My neighbor has one of these and being a good guy, I ended up screwing with it, at least twice over the years. Both times it was a result of debris collecting in the pump impeller. Even if these things don't end up pumping washing machine discharge, I would still make some effort to strain out as much gunk as possible, before it heads in to the drain. Maybe using one of the stainless steel kitchen sink strainers? I would also install a pair of "Fernco" couplings on the intake and discharge lines. These are inexpensive rubber couplings with stainless steel clamps. This allows you to easily remove and replace the unit if you need to service the pump.