How to Connect an RV Toilet to a Holding Tank

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Recreational Vehicles (RVs) are equipped with toilets that flush waste down into a holding tank. These tanks allow the owner to use the toilet without having the unit connected directly to a sewer line. Owners can repair or modify their RV with little to no trouble, saving them time and money. RVs mainly use plastic marine toilets to save weight, which is important for RV manufacturers. Many styles of RV toilets are available to fit your preference, including different seating and color options, and an option for porcelain RV toilets instead of plastic.

Things You'll Need

  • Screwdriver
  • Teflon tape
  • RV toilet flange
  • Toilet flange seal
  • Toilet mounting bolts
  • 1/2-inch box wrench
  • Adjustable wrench
  • Remove the screws holding the toilet flange to the floor using a screwdriver.

  • Turn the toilet flange clockwise to unscrew it. For stubborn flanges, use a hammer and screwdriver to tap the flange to get it to turn.

  • Wrap the threads of the holding tank pipe with Teflon tape.

  • Screw the new toilet flange to the holding tank pipe by turning it clockwise. Line up the toilet to the mounting bolt tabs on the flange.

  • Place the toilet flange seal onto the toilet flange and slide the toilet mounting bolts into the mounting tabs on the flange.

  • Set the toilet onto the flange seal. Line up the bolts with the mounting holes on the toilet.

  • Install the washers and nuts onto the mounting bolts, and tighten the bolts with a 1/2-inch box wrench. Be sure not to over-tighten the nuts because this may crack the toilet.

  • Install the water connection to the toilet and tighten with an adjustable wrench.

  • Turn the water supply on and check for leaks.

Tips & Warnings

  • Wrap all threaded connections with Teflon tape to ensure a proper seal.

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References

  • Photo Credit Jupiterimages/Photos.com/Getty Images
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