Yellow powder in fresh water tank vent tube

All I could afford wrote:
I’ve owned my 1999 trailer for 8 years now. I start every spring with a flush out of the pink antifreeze in the plumbing, followed by a sanitation of the fresh tank and pipes with a quart of bleach mixed into the full 30 gallon tank.

Last week when I went to service the system, I noticed my half inch diameter clear vent tube was clogged with dry yellow powder for the first 2 inches coming from the tank. I removed the hose and tapped the powder into a white coffee mug before washing out the tube and reinstalling.

Could this be from filling up the tank in mountain areas with high mineral well water? Should I be concerned? I’m having trouble trying to attach a photo today

I'm interested in the residue too. I find it in my fresh water tank drain, and also the aerators of the faucets. It almost looks like the spray foam that is degrading. But I don't know how any spray foam would have made it into the tank.

cptqueeg wrote:
Pine pollen perhaps?

My Thoughts as well.

Try this for photoposting.

mobeewan wrote:
I'll second on the pollen.

If you don't have a good water fill connection enclosed behind a hatch or door, everything that gets washed down the side of the trailer when it rains can get in the vent tube or the water fill port if it doesn't have a cap.

I had my trailer in to a dealer to get the roof Corners resealed because the caulking was looking bad. While I had it there I also paid for them to wash and wax it. About a week after I got it back I found liquid wax that was sprayed on it in the fresh water fill hose. There was pink wax residue from the spray on wax that ran down the side of the trailer and gotten into the fresh water fill hose.

The water fill port looked similar to the shorepower mouse hole with the same type of flap that snapped closed over the opening. I wasn't too happy about that one. I had to remove the fill hose between the outside hatch and the tank and scrub it out with a bottle brush and Dawn then reinstall the hose. I'm not sure if anything got into the tank but I flushed it a couple of times just in case.

Within a month I replaced the cheap water fill port with a lockable hatch type after I found sediment that looked like dirt in the hose again after I had cleaned the wax out. I figured it was dust and dirt that rainwater had carried down the side of the trailer and it had weeped into the cheap water fill port.

I've complained about those cheap city water ports a number of times on this forum, I'm glad that there is at least one other that understands the problem. I don't know how they get away with using this unsanitary junk. That vent will carry any thing down to the drinking water tank. I too, placed the port inside a locking hatch.

Example

I'll second on the pollen.

If you don't have a good water fill connection enclosed behind a hatch or door, everything that gets washed down the side of the trailer when it rains can get in the vent tube or the water fill port if it doesn't have a cap.

I had my trailer in to a dealer to get the roof Corners resealed because the caulking was looking bad. While I had it there I also paid for them to wash and wax it. About a week after I got it back I found liquid wax that was sprayed on it in the fresh water fill hose. There was pink wax residue from the spray on wax that ran down the side of the trailer and gotten into the fresh water fill hose.

The water fill port looked similar to the shorepower mouse hole with the same type of flap that snapped closed over the opening. I wasn't too happy about that one. I had to remove the fill hose between the outside hatch and the tank and scrub it out with a bottle brush and Dawn then reinstall the hose. I'm not sure if anything got into the tank but I flushed it a couple of times just in case.

Within a month I replaced the cheap water fill port with a lockable hatch type after I found sediment that looked like dirt in the hose again after I had cleaned the wax out. I figured it was dust and dirt that rainwater had carried down the side of the trailer and it had weeped into the cheap water fill port.

Pine pollen perhaps?

Thirty-two ounces of beach in a thirty gallon fresh waster tank exceeds every recommendation I’ve ever read. Quarter cup for every fifteen gallons is the standard IMO for sanitation. Looking forward to your pictures.