[color=#0d0d0d]Can someone recommend a modern product that effectively helps safeguard against water/sewage backflow from entering our home in two basement drains? We have two 2" drains that need to be protected but want ones that will also help prevent bugs from entering the home. I see many styles when searching but have no experience.[/color]

Hey Guys, In my basement I have a 2" copper sewer line that takes the kitchen sink and washing machines. I want to add a utility sink with a pump to the 2" sewer line. I also want to change the route of the sink straight down the wall into the 2" line. The sink line is 1 1/2" pvc. The stack that goes straight up that is copper is a vent pipe. It dose not daylight. it's an old stack that is caped in the top of the header on the first floor. so it's got a good 9' of 1 1/2 of air space. Not to code today. The kitchen sink comes from the middle of the house that has it's own vent stack that goes out the roof. [url=https://scontent-lga3-1.xx.fbcdn.net/v/t1.0-9/p720x720/83114414_1552231344934518_8557479285080719360_o.jpg?_nc_cat=103&_nc_ohc=y4Nb_6i4zgsAX9j4Ud9&_nc_ht=scontent-lga3-1.xx&_nc_tp=1002&oh=56ad9af87811da67a9c2290d8fa4aadf&oe=5ED21394][/url] Questions are Can I connect the pump vent to the stack that does not vent out the roof? there is no way to get the sink one. Getting a new 2" copper y fitting and a t fitting for the line is hard to fine. Should I just cut the copper and add those fitting in copper or replace that section of the line with 2" pvc? Not shore what fitting to use to connect pvc to copper. Is the right way a coupler line, like I did above? thanks