Bubblling Toilet Followup - and a Suprise...

This is why we use the fill and flush method with the Sani flush valve every time we empty the black tank. Fill the remaining volume of the tank with water and switch vale to gray tank and ffill to full volume or vice verse. Then pressure back to black tank and open valve slowly and let the tank get cleaned. When water starts to come out clear let it run five minutes more. Switch to gray tank and turn on the water and open sewerr valve slowly. let drain and let flush five minutes longer after water clears. Snesors are clean as well as tank. Put about five gallons back in black tank with chemicals, and some amout perhaps a gallon in gray tank and chemicals. last flush for storage don't put any water back in unless you plan pn using it again in a reasonable time. The chemicals keep the bugs from developing. Calgonite will help clean sensors and tanks when it shoshes around going down the road with the five gallons or with sewage in it. Flushing is really important to keep as many problems away as possible on our rigs.