Camping in cold weather vs plumbing & tanks

evy wrote:
Ok so I read a lot of posts about insulating the campervan, I live near Montreal Canada, I'm thinking I want to have the possibility to camp out from mid March (23°F avg) to mid December (21°F avg), so it can get pretty cold (mostly at night)... Basically I'm Trying to move all the water tanks inside the vehicle rather then under it:

-Fresh water tank with pump under the bench.
-Grey water tank under the bench next to the kitchen sink (gravity)
-Black water tank : Thetford cassette, under the toilet seat but above the van's floor
-Grey water from the shower : I was thinking making a 27"x24"x8"High shower base slopped to a SIDE drain connected to a small pump transferring the water to the grey water tank under the seat, maybe with a manual on/off switch (no floats)...

Looks like you have taken care of all that needs to be kept warm. The only question was the gray water from the shower. I would not bother with the catch basin, pump, and switches. Many motorhomes have plumbing already set up for outdoor showers in warm weather. So what is wrong with showering indoors and draining on the ground to the outdoors in colder weather?

Someone will probably question whether you can dump gray water just on the ground. I suppose those people never wash their cars in the driveway or let the soapy water run all over the ground?