I would like to know how to install and plumb a flush toilet in an RV that has a holding tank toilet now.?
I live in a fifth wheel RV in a permanent spot and would like to replace the existing toilet with a regular house type toilet. I have a septic and a pipe open for it, but have no idea how to even start the plumbing from the rv to the septic pipe. Or what I need to change on the RV itself to make room for the new toilet. Someone said I have to take out the holding tank first, is this correct? I know somewhat how to plumb the water to the toilet, it's the pipe going out I am not sure of. Or what materials I need to get it started with. Any ideas or help would be great as I am a silly lady determined to do this myself. Thanks
I'm going to assume the holding tank/toilet is a gravity operation, hence creating a natural flow to a holding tank. That holding tank must also have a gravity feed/release, or do you have to get it pumped?
I'm also trying to imagine the RV toilet being vastly different in size to a regular house toilet. (No offense, but it is a toilet)
The plumbing will have to be simialar or The size of household sewage drain,,,3 to 4 inches, have an exit point under or on the side of the RV, perhaps using an exit port already in existance? Then plumbed with that same pipe, to the septic. A decent plumbing supply house will be able to correctly supply you. There should however be some hardware, pipe, fittings, etc, already in existance that may be viable. Once a toilet is flushed, it's a relatively straight shot to City sewage disposal drains, and/or a septic. You might also visit a store that sells specifically to Mobile Homes,,,very likely a similar situation in construction and sizes. I live in a mobile with a regular size Standard toilet.
While I understand you say Permanent, you might want to consider (If it still rolls) that one day you might be moving the RV.
Steven Wolf

