Regular use of Raritan Engineering Cleans Hoses (C.H.) dissolves buildup in the lines and holding tank of a marine sanitation system. After identifying the length and width of the hose that needs cleaning, determine the amount of treatment needed. Then mix 1 part formula to 5 parts clean water. Pour it into the toilet and allow to sit in the line and tank for at least six hours. Then flush with at least 10 gallons of water and pump out the holding tank. $113 per gallon, $37.50 per quart; raritaneng.com
