Step 1: Overview and Materials
Gloves - preferably rubber or anything that won't let water or "yuck" through.
A wand - a length of cpvc pipe with a valve used to put into the toilet and rinse the tank.
The picture of the wand is easy to miss - it's next to the detergent.
Sewer hose - a special hose used to drain RV tanks.
Female to Female (not as interesting as it sounds) - a female to female garden hose adapter used to connect the hose to the wand
Laundry detergent - powdered laundry detergent (the cheaper the better) I have read on several forums that the detergent helps break apart the waste and decrease smell, and it seems to work very well.
Hand sanitizer - for sanitizing your hand as often as you need!!
I also use at our present location a portable waste tank - because there is no immediate sewer hookup available.
Step 2: Find the Valves
Step 3: Attaching the Sewer Hose
Slide the other end of the pipe into the sewage connection in the ground or into your portable tank (this connection does not lock in but rather slips).
Some may have the locking channels on both ends for different types of connections, some amount of analyzing may need to be done to make sure that you have the proper fittings for your particular situation.
Try to make sure that the hose drops elevation from your RV to your destination (becomes lower).
It is also a good Idea to support your hose so that it has good downhill flow. There are products sold for this but I have found that a board works just fine, and it was free.
Pull your sewage valve open and let it drain for a few minutes. I usually let mine go until I can't hear water flowing through it.
Close the valve. If you are connected to a sanitary sewer line (!!! NOT A STORM SEWER !!!) then proceed to the next step but if you are using a tank like I am then I have added some extra steps at the end of this intractable for how I dump the portable tank.
Step 4: Clean the Tank
Some people just fill the tank and then dump it again but for best odor control and to prolong the life of your tank it is best to rinse it with a wand, or something that will break solid waste and toilet paper free from the walls.
I rinse the tank by:
Turning off the water pump.
Opening the toilet and pouring about 4 cups of laundry detergent into the tank.
Then I use the wand to rinse around in the tank until I see that the water level has risen to the bottom of the pipe leading from the toilet to the tank. ( I made the wand out of 1/2 inch cpvc for about 4 dollars)
After rinsing the tank, pull open the drain valve and allow to completely drain.
When the tank is completely empty add a tank deodorizer and follow the directions for that product. We use a deodorizer that contains no formaldehyde (we have read in many forums that the formaldehyde can damage the rubber seals in the tank).
Close the drain valve, remove the hose and replace the cap. Now you have successfully drained and rinsed your tank.
I usually have to do this once a week. Every three weeks I do this twice (not sure if it's necessary but it doesn't hurt).
Step 5: If you have a portable waste tank.
This step is more of an overview of how we do it rather than a "how to"
Our tank drains from the broad face rather than the thinner bottom, this in combination with where we have access to drain it forced us to create a way to elevate the tank.
To elevate the tank we installed a pulley system which uses a metal ring at the bottom of the storage building, a pulley at the top and a cable puller and some rope to connect it all together.
These tanks are very heavy when full, I weight about 280 lbs. (127 kg) and with my entire weight on the other side of the pulley we could barely get the tank moving, so I would guess that the tank completely filled would weigh at least my weight. The point of mentioning this is ---SAFETY---, use only rings, pulleys, ropes and pullers rated for for the appropriate weight, everything in our system is rated for 400 lbs. (181 kg)
We have extended a pipe from the sanitary sewer to just outside the house.
First with the tank still flat on the ground I remove the large cap from the tank and the sewer line from the house and attach the sewer hose to both,
I then lift the tank vertical and attach it to the rope (leaving the smaller breather cap on until after it is vertical and attached) then I remove the smaller cap so that the vacuum from the move starts a syphon and begins to drain the tank.
As the tank drains I lift it with the cable puller until it's as high as it will go, I drain until empty, and then lift and drain the excess in the hose.
After the tank is empty I attach the hose to the breather port and rinse the tank well before storing.