Golden_HVAC wrote:
AS for the black tank, I would not remove it. It might be useful someday.
For the grey tank disposal, what I did was buy 30' of drain line. It has 3/8" holes spaced every couple of inches, and 4" outside diameter. Cost was nominal - like $8 per 10' section. I installed a clean out tee, so it has 10' one direction and 20' the other direction. It was buried about 15" underground, and handles all my grey water needs while living in the RV full time. Black water could have been drained into the same line, if it had been buried about 4' deep. But I did not want the smell to come back to the surface, and worried about it clogging with debris should I drain the black water into it. If you used about 60' of the drain line, and buried it around 3' deep (using a trencher or other thing like a backhoe) then you could fairly safely put the small amount of black water down that hole, and it will dissipate. Not 20 gallons a week, but the amount that a RV puts out on a weekly basis.
Fred.
Take a 55 gal drum (if purchased a used one for about $10.00) and bury it 2 or 3 feed deep (in gravel or wrap black drain lines around it) this will be you septic tank. Connect the drum to your black and gray water drain lines. Attach field lines near the top, do not need to be water tight. Use black 4" plastic drain pipe with hole in it for your field line. or you can use white PVC with holes in it. Depending on the soil 30 to 40 feet should do. If you have access to gravel bury the field line in gravel with dirt on top. if no gravel run drain pipe side-by-side to get more drainage. The field lines should not be buried more than 2' deep. You don't want the septic drain field to be buried at unnecessary depth since the absence of oxygen deep in the soil will prevent some wanted bacterial action that we need to break down and process septic effluent.
Leave your black and gray water lines open all the time and use a goodly amount of water to flush down the toilet.
This is the set up that I have used for almost 5 years full time in my TT cabin in the woods with no septic problems at all.