After years of not having a working windshield washer pump (my piston seal was worn out) I finally got it working again ! iI wanted to rebuild my original pump and there is no one that sells a complete rebuild kit for this pump, the only rebuildalbe part that is sold is the tri-port o-ring seal. I ended up buying an Anco pump from RockAuto ($30.88), took apart the pump, removed the new piston and used it in my original pump. My pump works like brand new !