Hi, We experienced another storm/sewer back up in the basement recently. Everyone quotes two options: outside flood control backwater valve w/pump or an overhead sewer. I really want piece of mind and the ability to keep some expensive items in the basement. Everything I have read tells me an overhead is a more reliable solution. The challenge is one of my two stacks would be difficult to route to the front of the house to gravity drain into the new overhead line. Someone proposed sealing the back stack by running a new cast iron pipe under the basement floor direct to the back stack. (this stack supports a bath and kitchen). The basement appliances & drains would take the conventional overhead sewer set up - drain to a pump to push up and out of the house. Thoughts on this plan? If we route solid cast iron from the outside at a Y in the sewer line to the back of the house and up a sealed stack, this sounds like a heavy duty stand pipe. Good idea?? I appreciate all advice, I am really stuck on this one. I hate the idea of valves outside plugging up and not sealing during our annual "100 year floods".