Pop-Pop C wrote:
I use baking soda and white vinegar.
About a half cup baking soda poured in and on top of the drain.
Pour about 2 cups of vinegar down the drain slowly washing the vineager down.
Let set for a few minutes and flush with water . Repeat if necessary.
Done this for years in the S.& B and in the RV.
We owe you a beer, Mr. C ;)
We applied the above treatment, and waited a few minutes, and all is well. We live in the sticks, so I opened gally drain valve, and we can pour water through it, and it runs out the drain hose about as fast as we can pour it in.
Many thanks.