I find this pump noisy and found the dry side kept getting in my way and I kept pumping the dry side. It was suggested on another forum that since I had not used it long and that I was not happy with it, that I just return it. I contact Foster's and Smith and told them that I had used it for three weeks and was not happy with it. They have a customer satisfaction policy and told me that it was no problem to return it. So based on that, last week I returned the MP10 to Foster's and Smith for a refund.