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How To Change an RV Rest room in 7 Simple Steps I Tenting World Weblog


Whether or not fixing a broken rest room or upgrading to a mannequin with a better seat or a porcelain bowl, changing an RV rest room is a comparatively straightforward DIY job. Most RV homeowners can swap in a brand new rest room at residence with the fitting instruments and a suitable substitute rest room.

We’re right here that can assist you make the substitute and keep away from leaving your trailer at a service heart for a part of the tenting season or paying a technician. Observe alongside as we talk about the whole lot you might want to learn about altering a camper rest room, from required instruments to measuring for an ideal match.

What You Have to Change an RV Rest room

RV toilet replacement
Picture by Tenting World

Step one in changing the bathroom in an RV is selecting out a suitable substitute rest room. You’ll must examine a couple of issues to make sure your new rest room goes in with out subject. To begin, measure your present rough-in, which is the gap from the middle of the ground flange to the wall. The brand new rest room must have a rough-in equal to this or much less. 

You’ll additionally want to make sure there’s sufficient house ahead of the flange, particularly in the event you opted for an elongated seat. Guarantee all cupboard and entry doorways are operational with the brand new rest room’s dimensions. If wanted, you’ll be able to rotate the ground flange to treatment clearance points. 

With these steps full,  collect the required instruments and supplies for the RV rest room set up. Let’s evaluate these under in additional element.

  • Adjustable Wrench
  • Tape Measure
  • Putty Knife
  • Screwdriver ({hardware} kind varies by model)
  • Pliers
  • Towels
  • Gloves
  • Water Provide Line Adapter*

*Will not be wanted for each set up, however is probably required if the brand new rest room’s water inlet location differs from the previous mannequin.

Technician Tip: If compression-style fittings (e.g., Aptitude-It) are used, you might must buy a particular wrench to take away them.

How To Take away RV Rest room

Removing tie down toilet bolts
Picture by Tenting World

While you take away the camper rest room, there’ll now not be an odor barrier between the black tank and the RV’s inside. So, it’s a good suggestion to drain and clear the black tank earlier than beginning. 

You must also attempt to shut off the toilet and open any home windows or vents to let odors escape exterior and never into the RV. As soon as the bathroom is eliminated, it’s best to discover a spot to set it, such because the bathe pan. 

Step 1: Flip off the RV water pump

Step 2: Flush the bathroom to take away saved water

Step 3: Place a thick towel beneath the water line earlier than disconnecting the road from the bathroom base

Step 4: Take away maintain down bolt caps and loosen the nuts 

Step 5: Carry the bathroom up from the ground flange and put aside

Step 6: Take away the previous flange seal 

Step 7: Take away hold-down bolts by sliding them out and away from the flange

With the RV rest room removing full, prep the floor by eradicating leftover particles from the ground and cleansing the ground flange. Now’s the proper time to examine the ground for water harm and the ground flange for cracks. You’ll additionally wish to confirm that the ground flange is a match, sitting stage, and in good situation. 

If there are any flooring or flooring flange points, schedule an appointment along with your native service heart, as they should be changed or repaired. If you’re leaving the opening uncovered for any time frame, cowl it to stop odors from escaping into the RV. 

Set up New Rest room

Replacing RV toilet flange seal
Picture by Tenting World

It’s time to put in the brand new rest room with the previous rest room eliminated and safely out of your working space. Observe these seven straightforward steps when putting in a substitute RV rest room: 

Step 1: Set up new flange seal

Step 2: Slide new hold-down bolts into place

Step 3: Set rest room into place on flooring flange

Step 4: Safe rest room with nuts and washers, end with nut covers 

Step 5: Join the water line utilizing the suitable software

Step 6: Activate the RV water pump

Step 7: Permit the system to carry stress, then flush the bathroom to examine for leaks and performance

When securing the bottom to the ground flange, achieve this till the bottom is flush. Keep away from overtightening, as this might crack the bottom. If the brand new rest room’s water inlet location differs from the previous rest room, you might want an adapter to reroute or prolong the road. In some instances, this will require extra PEX hose. In others, it could require a 90° adapter. Consider your case to find out what extra {hardware} you’ll want, if any. 

Technician Tip: Please notice that RV bogs don’t use wax rings. As a substitute, they use a rubber flange seal. Wax rings are inclined to dry out over time and change into much less versatile, which might result in leaks in a constantly transferring RV.

Can I Change a Thetford Rest room with a Dometic Rest room?

Sure, normally, you’ll be able to change a Thetford rest room with a Dometic rest room or a Dometic rest room with a Thetford rest room, because the mounting flanges are the identical. Nevertheless, if the bogs are completely different sizes, you might encounter clearance points with the partitions or doorways, so examine these earlier than substitute. Moreover, you’ll need a brand new flange seal and hold-down bolts particular to the bathroom model and mannequin. 

What Causes An RV Rest room to Rock Again and Forth?

RV toilet floor flange
Picture by Tenting World

In case your RV rest room rocks forwards and backwards or aspect to aspect whereas in use, it’s seemingly as a result of a damaged or cracked flooring flange, a delicate or broken subfloor, or an absence of screws holding the flange in place.

The one method to examine for all three is by eradicating the bathroom. Some flooring flanges are merely screwed into the ground, however they can be glued, which requires particular instruments for removing. Changing the ground flange is a job greatest left to the professionals, so contact a service heart close by if you might want to change yours. 


We hope you discovered this information useful. Studying how you can change an RV rest room can save money and time, leading to extra comfy, aromatically pleasing household holidays! 

Take a look at a few of these different nice articles about RV bogs:

Remark under in the event you’ve changed yours, and tell us the way it went!