[RGordon]

I have the same issues with the black cover, but mine was more severe than a drip. It contains the grey water drain valve and the junction where both black and grey water come from within the basement compartment. My grey water plastic water PVC elbow broke from the excessive movement of the long drain line just below the valve. I couldn't or did not replace the broken fitting, but just purchased a rubber flex 90 degree fitting with stainless bands on each end and just covered both the fittings. The long run of the 3 inch drain pipe is not supported sufficiently and allows the pipe to move creating too much movement within the black box causing leaks or pvc pipe breakage.