Originally Posted by 10Boomer
This would also work for gray water tank?
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Yes it will. I have used them on 4 different trailers and install them in the grey and black water tanks. I started using them when I began having problems with the tank level indicators, so I try to install the sprayer so that it will spray water on the sensors that are inside the tank. I seldom have any issues with the sensors not sowing correctly now.