I have the gooey mud issue too. put a brick or two in the bottom, and when it gets bad, use Wifeys Salad Slot Spoon to scoop it out. (it hangs on a nail in rafter. She asks me if I have seen it lately? No Dear, should buy another)Lol. 2ft lift, no check valve, right through the wall to a flex pipe. Only replace once in 25 years. Cast Iron Submerisble 1/3 hsp.