And how do I know which tank monitor and dump valve, is for the galley or the shower? Nothing is marked telling which is which.
Empty both tanks.
Close both valves
Turn on the shower.
Leave it running until one of the two gauges gauge clearly shows a tank partly full.
Remember which one it is. Mark it "Shower" or whatever.
Turn off the shower.
Go outside and operate one of the grey water valves.
If no water comes out, mark that handle "Not the shower Tank"
If water does come out, mark the OTHER valve "Not the shower tank"
Tony Lee - International Grey Nomad. Picasa Album
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RVs. USA - Airstream Cutter; in Australia - MC8 40' DIY Coach conversion & OKA 4x4 MH; in Germany - Hobby Class C; in S America - F350 with 2500 10.6 Bigfoot camper