Hi, I have this pump worried that I can make an extremely small pond so empty in the hope. That was my thought. Unfortunately, no force. Have tried everything. With suction hose and short and long hose. Not a drop goes through the part. I do not know why you need the thing. Misinvestment with me. But the service of the company TOP! Because the first pump was delivered deffekt (crack in the housing), I promptly got a 2nd pump. why 2 stars