Insulating a floor drain

[wilcobravo]

Hi All -

I'm moving my laundry room to the second floor very close to the garage and my inspector suggested running the (emergencies only) floor drain straight into the garage (so that I would notice if there was a leak). Especially given how complicated it would be to tie into the waste stack and then needing to prime the trap, I think it is the best option. My question: any ideas how to keep the cold air from the garage out while still allowing it to drain? I'm considering a rubber floor trap seal (like the one linked below) but I've heard they may restrict the flow too much. Any other thoughts?

https://www.supplyhouse.com/SureSea...JFKuLS_M7IPCGz7qIMjTuDkAtPOZCLoxoCow8QAvD_BwE

 

[Themp]

Another way is to just add a check valve on the pipe in the garage. Here is a link to check valves:

https://www.plumbingsupply.com/pvccheck.html

The spring and magnet ones look viable for you setup. These would keep out the cold air and any water coming from the second floor will definitely have the force to open the valve. Would keep out bugs too....

 

[Sponsor]

 

[wilcobravo]

Great - I didn't know those existed. Thanks!