Up north when they put a sewer pipe in from the street to the house there is a one way valve installed where the hook up is made which prevents back up from the sewer from occurring.

Good advise

Yes, you can have a check valve installed.

Parks' Plumbing Offers Patented Flood Control Solutions

Yes, you can install one of those devices, but I wouldn't do it. It could easity cause a sewer clog and maintenance issue. In The Villages, as long as the nearest sanitary sewer manhole cover in the street is lower than the floor level of your house, a major systemic sewer backup will fill up the manhole and pop off the cover before it floods your house. The best thing to do is to make sure your homeowners policy includes an endorsement for water backup coverage.

Where are you in TV. What about neighbors homes that are empty snow birds?

Toilet merely traps sewer gas with water

There are quite a few snow bird homes here and who knows if they got hit or not. Mine was the only occupied home that it happened to and it was negligence, they had a schematic showing where the clean out was and it was not buried or covered, they just didn't bother looking.

What village are you in?

RIF: Location: village of Fenney, Ford City, Pa., and Hudson, Ohio

Talked with CDD Utilities today and they assume no responsibility it is in the hands of the contractor. Three down and none to go.

Did they say the company was working for them ?

They did acknowledge that they were contracted by them and all communications should be with Jacobs. I am getting my re-imbursement from Jacobs although they told them that it was mailed last week and it is not here so don't think they are telling the truth. One month today since this happened.