The final assembly? Found the problem with this washer pump too late ! The impellers were jammed tight together and the result the slotted spindle spun in the cutout hole until it made the D shape round rendering the pump useless! A quick dismantle and assembly with a new wheel/impeller ensuring that they rotated freely together and it works fine! Maybe all new Britparts require is a dismantle and thorough check to ensure longevity. Chris