How to Remove an RV Holding Tank

How to Remove an RV Holding Tank
Your RV holding tanks hold the wastewater from your RV's plumbing system. Having leaking or improperly cleaned tanks is bad news for you, and could even get you kicked out of your favorite RV park. However, with a little care, you can keep these tanks in tiptop shape. That's why from time to time you may need to remove these tanks to make them more accessible for proper cleaning or repair.


Difficulty: Moderate

Drain the tank

Things You’ll Need:
  • 1 Heavy-duty sewage hoses
  • 2 Hose adapters
  • 1 Set of couplings and connectors (to fit your tank)
  • Socket wrench
  • Floor jack
  • Pocketknife
Step 1
Close both valves on your tank and remove the tank's sewer cap.
Step 2
Place the hose adapter over the outlet. Turn the adapter clockwise until you feel it locking into place.
Attach the other end of the hose to the park's sewer connection by using the other hose adapter.
Step 3
Open the tank's valve (at the end of the hose attached to the sewer line) to let the water flow out. The large valve releases the black (toilet) water tank, and the small valve releases the grey (dirty tap water) tank. Make sure to release the water from the correct tank, or release the water from both tanks if you plan on removing both. Detach the hose from both the sewage end and the tank end.

Remove the tank

Step 1
Turn off your water pump, and ensure your RV is not connected to the city water supply. Unscrew the water connection behind the toilet by turning the connection counter-clockwise.
Step 2
The way toilets are attached to the floor varies. Many are attached by nuts and bolts. You'll probably be using a socket wrench to detach the toilet from the floor, but use whatever method is appropriate for your toilet. Lift the toilet out.
Step 3
Unscrew the floor flange from the tank's top using the socket wrench. Support the tank's weight with the floor jack.
Step 4
Remove the tank from the tank straps. You should be able to do this by loosening the straps with your hand, or unhooking them, depending on your tank type. Cut the tank line (which runs through the top of the tank) with a pocketknife.
Step 5
Lower the floor jack, allowing the tank to hit the ground. Go outside, and drag the tank out from underneath the RV.

Article Written By Kelsey Childress

Kelsey Childress runs a freelance creative business called Awen Creative that specializes in SEO Web content, social media marketing and blogging. She has been writing for online and in-print publications for over six years, and has a bachelor's degree in English literature and creative writing from Kansas State University.

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