The description indicates the passage of fractions up to 35 mm, but if you look into the water outlet hole, the distance between the rotor and the water outlet wall is no more than 20 mm, which leads to jamming of the rotor in the case of a large and viscous fraction. In general, the pump is not bad, but not for a permanent stay in a septic tank, it is definitely not suitable for autonomous use. I bought a pedrollo and kept this one as a backup. All in all, a good pump for the price.
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