Sink Trap in Flagstaff T21 FKHW

[NNM476X]

I am working on the details of making a hose connection from our grey water sink drain to a standard RV park 4" sewer connection. i am aware of the potential issue of sewer smell coming into the RV and have looked at a number of posts on the forum on this subject. Here is a photo of the sink drain and trap in our Flagstaff. I believe it is a Camco CAM37262 trap. Does this Camco trap somehow prevent the back-flow of odor from a sewer or holding tank like a traditional P trap does?

[mzak]

Originally Posted by NNM476X

I am working on the details of making a hose connection from our grey water sink drain to a standard RV park 4" sewer connection. i am aware of the potential issue of sewer smell coming into the RV and have looked at a number of posts on the forum on this subject. Here is a photo of the sink drain and trap in our Flagstaff. I believe it is a Camco CAM37262 trap. Does this Camco trap somehow prevent the back-flow of odor from a sewer or holding tank like a traditional P trap does?

Yes, there is an internal valve.

[NNM476X]

Thanks mzak for the information. Much appreciated.

[mzak]

Originally Posted by NNM476X

Thanks mzak for the information. Much appreciated.

Just to clarify, technically it does not have a valve but it does prevent the backup of sewer gases. There is a small internal tube that holds water and acts like a standard p-trap. I am going to replace my standard p-trap with one of these and have done the research. There is also a waterless trap available at a higher cost. Google "waterless rv drain trap" if you are interested and they will show up.