Floor drain back flow

Users who are viewing this thread

Rayh78

Member
Messages
98
Reaction score
3
Points
8
Location
Colonial Heights, Virginia
Want to replace a floor drain in a basement since already doing some concrete work. Looks like just a 2" line.
I know there will be a P trap in the line. But is there a backflow valve.
I have used check valves for other things. But it seems like a good idea to have one here so if main line ever backs up would not flood basement. But how could this even work since the floor drain would have so little pressure to open valve. If the flapper type is that weak it does not seem like it could work well.
thanks
 

Gary Swart

In the Trades
Messages
8,101
Reaction score
84
Points
48
Location
Yakima, WA
There are two types of back flow checks that I know of. One is a swinging flap that is supposed to close if/when water rises in the drain. These don't really work well because over time dust and lint collect one the gate and when water rises slowly, they don't close. The second type has a ball that floats up and closes the pipe. These don't seem to be affected by the accumulation of lint and work quite well.
 

FloridaOrange

Plumbing Designer
Messages
1,298
Reaction score
2
Points
36
Location
SW Florida
Backwater valves. The ball type are definitely the ones to go with. The one's I've seen "push" the sanitary a little lower by design so if pipe invert is an issue they may not be practical.
 

Peanut9199

Customer Service Manager Plumbing Wholesale
Messages
869
Reaction score
2
Points
0
Location
Ontario, Canada
I have installed one of these in my basement floor drain.
Let's the water out and stops water coming in.
General-Wire-2F-rw-8814-169623.jpg
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks