1/2 Bath black tank stink

[piperarrow]

Looking for a plumbing diagram for 2012 Sierra 365saq. Particularly the rear 1/2 bath into the black. I am aware that both the toilet and sink drain into the black tank. There is no outside kitchen, and the kitchen sink drains into the galley. The trailer has a black tank gas stink that permeates under the 1/2 bath sink. There is indeed water in the trap and toilet, and the air valve has been replaced for that sink. My suspicion is a cracked drain pipe somewhere near or below the floor, or the connection of that sink drain into the black tank is no longer sealed, allowing gas to escape the tank. Does anyone know if the sink drain is plumbed through the floor and then directly into the top of the back tank? The roof vent has been visually verified open with an inspection camera.

A diagram would be even better.

My response, via e-mail, from FR consisted of "We do not have wiring or plumbing diagrams." I find it unlikely, as without a diagram, a tech could just run wiring and plumbing wherever they like. If that is indeed how FR production works, my next one won't be a FR product.

Thanks for the help in advance.

[bikendan]

Doesn't exist and and that's pretty common throughout the RV industry, not just FR.
If that's your opinion, then your list for your next RV will be a very short one.

[piperarrow]

That does not help with determining the plumbing of that 1/2 bath. So the RV industry does engineer out drawings to determine placement and design of systems, components, needed supply, and manufacturing efficiency? The trailers and motor homes are essentially condensed homes. I like this FR, and maybe just expected more from a manufacturing process.

[bikendan]

I was simply commenting on your statement about FR's email.

[Ken Halloran]

Had a friend - 5th wheel - stink. His problem proved to be the laundry unit - stuff built up in the drain from the washer to the tank - started stinking up through the drains. Don't know if you even have laundry facilities, but thought I would pass it along. Good Luck.

[rebryson]

Check your toilet by looking in the back below the back of the seat. I had a defective toilet in my new vengeance. After fighting with the dealer who had no clue I called the toilet manufacturer gave them my serial number. They told me I had defective toilet and sent me a new one. Problem solved. You will see fluid in that hole if you have a defect.

[silverback 35ts]

Originally Posted by piperarrow

Looking for a plumbing diagram for 2012 Sierra 365saq. Particularly the rear 1/2 bath into the black. I am aware that both the toilet and sink drain into the black tank. There is no outside kitchen, and the kitchen sink drains into the galley. The trailer has a black tank gas stink that permeates under the 1/2 bath sink. There is indeed water in the trap and toilet, and the air valve has been replaced for that sink. My suspicion is a cracked drain pipe somewhere near or below the floor, or the connection of that sink drain into the black tank is no longer sealed, allowing gas to escape the tank. Does anyone know if the sink drain is plumbed through the floor and then directly into the top of the back tank? The roof vent has been visually verified open with an inspection camera.

A diagram would be even better.

My response, via e-mail, from FR consisted of "We do not have wiring or plumbing diagrams." I find it unlikely, as without a diagram, a tech could just run wiring and plumbing wherever they like. If that is indeed how FR production works, my next one won't be a FR product.

Thanks for the help in advance.

Diagrams for any type of plumbing or electric is not going to happen for any brand or model of rv (unless you own a motorhome) so you like everyone else is left in the dark. But to your issue, I did read your note and yes it is never a nice thing to have sewer gas smells inside your rv, but I really question your statement ( I am aware that both the toilet and sink drain into the black tank.) as to have a sink drain into a black tank is very strange. Yes it can be done but strange. I have included a link that shows your coach has TWO 108 gallon gray tanks, with this much tank size I believe your sink drains into this not the blank tank.

Now to your issue of smell your can have a GREY tank smell so bad that it appears to be a black tank, and this case it just needs to be cleaned well. You can use dish soap and some water softener to help clean your tank, then add some kind of tank fresher and you should be ok, if the smell continues you might need to exchange your trap with a "hepo valve" these have been used for this kind of issue and in most cases will stop all odors.

So good luck with your smell issue they can be very unpleasant and then Happy Camping