Black/Gray tank maintenance

No one has mentioned/I recommend filling about 1/2 full of water and bottle of Dawn Then drive around to get a good slosh going!
Then give it maybe a day to soak.

Rid X is for long term tanks only like - septic tanks. Using LOTS of water and emptying when at least 2/3 full has worked for us for years. We put little paper down the tank and toss daily wet paper out from wastebasket. I use occasional tank chemicals only when storing long term or if it is exceptionally hot. Dawn liquid is great for breaking up grease in the grey tank. Black tank, biggest key is lots of water................ Happy dumping!

After emptying black tank close dump valve. Fill tank and overdose with Dawn disc liquid while filling. Let it set sit over night. Dump again and then use wand inserting in commode slowly twisting wand while slowly going in and out. I can stick a mirror down in mine and see it is spotless after this process.

sehunter wrote:
What the heck is TSP? I don't understand all these abbreviations. I worked for the Federal Government which didn't use this much and they are famous for them.

Everyone has different background - TSP is a common cleaner used by many b4 they paint walls etc - suspect most RVers are familiar with the term.

Forget all the fancy additives. Use lots of water and dump when full. That's all you need.

TSP is trisodium phosphate, and typically comes (when or where available) in a box labeled "TSP". You might find it in a big box store in the painting prep/paint stripper area, if not in general cleaning supplies. Many places frown on it or ban it because they are trying to limit the amount of phosphates released into the environment (particularly into runoff).

What the heck is TSP? I don't understand all these abbreviations. I worked for the Federal Government which didn't use this much and they are famous for them.

My black water sensor always read "Full"

I tried a lot of of things. Here is what worked for me.

I dumped in some TSP, soap and a black tank chem. Then poured in about 20 gallons of hot water that I hauled form the house. That didn't make any difference, so then I filled the tank right to the top and let it sit for a week.

When I drained it read empty. For the first time in years.

I start out every trip using a few dishwasher packs. Specifically I use Cascade Platinum ActionPacs Dishwasher Detergent. I drop 3 in the toilet and 3 in the sink so both black and gray tanks are primed with cleanser. The tanks smell better too.

I have used septic tank cleaner on a couple of occasions - but I let it sit for a couple of weeks during warm weather.