we did not conserve water at all on that trip where we found out the back sink drains into the black tank.
it was our first trip with that unit , other than the back yard, we had 5 people in the unit using the bathroom ,etc,(not usually 5 people) we wanted to make sure everything worked, we where only a couple miles from the dealer so any issues could be addressed real easy,as we live a hour away from the dealer
we have since changed how we use the black tank , the person who always runs you through the new trailer set up(orientation) always says add about 10 gallons of water to your black tank then add your chemicals , we add about 8 gallons , never a issue with our 2009 28bhs , never showed on the gauges, our new 2011 32bhds shows 1/3 of a tank used , used the same blue water jug to dump the water down the toilet for each trailer , figure the gauge in the new trailers black tank are set lower- will get back to this later
when we got after the dealer about the back kitchen drain issue, as they never told use it drains into the black tank so we filled the black tank so fast our sales guy and head sales guy said we where adding to much water to the black tank with the chemicals to start with , our sales guy said add 4 flushes worth of water with the chemicals to the black tank that is all that is needed , plus they gave use a new black tank chemical to try out-liquid stuff much better than the powder stuff we where using
so this other way puts a lot less water in the black tank right off the bat, than what the guy giving the orientation said , on our 2009 28bhs we never filled the black tank in the week camping with just the 3 of use camping
we went camping again the other weekend where we had to use the honey wagon on the grey tank , since everyone had showered 2 days in a row(daughter had a bath the one day) and dishes and some trailer cleaning,these weekender trips we don't worry so much about water in the trailer -to many line up at the comfort station shower.
anyhow i had to empty the Grey tank since the nice little gauge said it was full, we have a 32 gallon grey and black tanks with 84 gallon fresh water tank , the honey wagon is also 32 gallon , so i emptied the full grey tank into the honey wagon , expected a full honey wagon - wrong it was only a little more then 2/3 full we had only about 20-25 gallons of grey not 30ish like we thought, so i figure the grey and black tank gauges are set really low in the tanks, our 2009 28bhs you would get almost a full honey wagon for a full tank of grey or black water
the fresh water tank on the other hand is only full when it is full. filled it as full as possible- really slow and it only says full when its full
I have since re plumbed the rear kitchen to run into the grey tank or the black, just turn a couple valves and the rear kitchen drains to the grey, turn the valves the other way and it drains into the black tank
since i had the extra thermal cover opened for the under belly by the grey tank to run the plumbing line i looked at the grey tank sensors and yep the sensors are grouped lower in the tank, 1/3 sensor is about 1/4 the way up the tank then full is about 1/4 from the top of the tank, so the gauges are not set the way we had expected
the rear sink is only a bar sink in size and when we do dishes in that sink we only part fill the sink then wash and add water as we rinse the soap off the dishes a little, never over fill the sink , use about a gallon of water or less
got to love those sensors
And yes our rear kitchen door leaks , after it had rained and you open the door water comes out around the inside bottom edge of the door as you raise it
adding a couple outside lights to the trailer, one by the outside kitchen then one light at the rear of the trailer , also ordered a tank monitoring panel with lead wires so i can add a second monitoring panel to the rear kitchen - ordered the stuff off of ebay, all new $58 with shipping for 2 outside lights and a double light switch and the monitoring panel with leads
now to add a couple 12 volt outlets for charging the cell phone and running the 12 volt tv and dvd player and 12 volt portable battery pack and lights in the storage bay are next on the list
Happy camping everyone