Sniff test doesn't work

Jim@HiTek wrote:
Just get a bathroom PVC 'T' and put one on each vent. Only $8 total and you help avoid smells from either tank.

What is a bathroom T?



OR

You should have a CLEAR piece Elbow or extension, somewhere in your Sewer Hookup.. Remove the broken cap or one cap.. Dump both tanks, leave Open one of the dump vales, have a partner watch the clear section while you shoot a garden hose sprayer into the hose (DO NOT INSERT HOSE INTO PIPE) if water runs That's the vent for the open tank. If it does not, after 2 or 3 gallons have partner open the OTHER dump vlave, if water runs than that is the tank you are watering.

That easy.

Kayteg1 wrote:
If you have air compressor or leaf blower, you can stick air hose into the toilet with some rugs to seal it and then go on the roof and even with minimal flow, a piece of paper will show where the air comes out.
Thinking more - any vacuum with reverse hose will work.

I'm imagining some idiot hooking up a leaf blower to his outlet at the dump valve and the resulting **** geyser shooting out of the roof :) Not sure why but I got a laugh.

I just did my vents. I wasn't sure witch one was for the black tank so I did both. It can't hurt.

Drain both tanks empty, close both valves, put water hose down one vent. Let run for a few minuets. Shut off water go open black tank if you have water you found the black tank if not it is the gray tank.

Just put a pint of PINE SOL in the Black tank. That will allow the Pine Sol odor up its vent pipe. Doug

Just get a bathroom PVC 'T' and put one on each vent. Only $8 total and you help avoid smells from either tank.

Been there done that. Had a fifth wheel a few years back that I was adding a SeeLevel tank monitoring system to. Had trouble figuring which tank was which because of limited access. So, I ran fresh water into the tank via the roof vent, see which tank fills.

Turn the water on in the sink and listen at each of the pipes.

Perhaps you may hear the water running into the gray tank.

You could empty one of the tanks, then go fishin and see if the bait (paper) comes back up wet.