Sorry, but it seems to me that it is not enough to buy it, it must also be installed. I offer interior basement waterproofing near me , where they will definitely help you not only choose the best pump, but also install a drainage system that will allow you to sleep peacefully and confidently, knowing that everything is fine with your house. I think that it is worth a lot - experts will be ready to help you at any time, so do not waste time in vain.