Browse Forums Renovation + Home Improvement 1 Jul 18, 2013 10:00 pm The wife and I are looking at some major extensions that require the existing standalone toilet to be removed. The new extension will have a separate bathroom and toilet that will become the main family facilities. So what we were thinking was removing the bathtub from the existing bathroom (which also has a shower and vanity) and putting the toilet in there instead. As mentioned this room will very rarely be used as anything but a toilet but will be handy to have a shower for guests etc so being shared and loosing the bath won't be issues. So my question is when toilets, bathtubs etc are plumbed (bearing in mind the house was built circa 2000 so everything is plastic) are the sewerage pipes in the slab all pretty much the same size with only the last bit connecting the respective device adjusted to size. So if the bath tub was removed, what work would be required to put the toilet in it's place from a sewerage perspective? I would imagine if the pipe sizes underneath are the same it won't be too hard, just a 'simple' dig of the slab and put on the appropriate toilet coupling but if they are different I gather it will require major (expensive) work to "tap" into the main pipe outside the house. Now if it makes any difference I know the main pipe runs outside the house past the bathroom where there is an inspection cover. Coming into the bathroom from outside the bath comes first, followed by the floor drain, vanity and finally the shower. The existing toilet is 'downstream' of this bathroom. Now only asking so I don't get price shock when the time comes to present the builder with our ideas of what we want. Re: Moving Toilet to Bathroom 2Jul 19, 2013 10:19 am A lot of that will depend on how many of those fittings are shifted from their current position and how far. You may have to dig up a lot of your slab in that area to install the new sewer pipes. Posting a sketch or plan of your existing layout plus proposed would help a lot. Stewie Re: Moving Toilet to Bathroom 3Jul 19, 2013 10:51 am A sketch would help and it will depend on where you are because plumbing regs vary greatly from state to state, but removing your bath should only require sealing off the bath connection point. Naturally it will depend where you want to site the toilet, but as your sewer main runs past outside, why not use a 'P' trap toilet pan discharging through the outside wall to save tearing up a lot of the floor Arfur Re: Moving Toilet to Bathroom 4Jul 19, 2013 12:01 pm Uncle Arfur A sketch would help and it will depend on where you are because plumbing regs vary greatly from state to state, but removing your bath should only require sealing off the bath connection point. Naturally it will depend where you want to site the toilet, but as your sewer main runs past outside, why not use a 'P' trap toilet pan discharging through the outside wall to save tearing up a lot of the floor Will see if I can do one up. However my thought was the new toilet would go right where the bath tub is now. The bath drain is already more or less in the right location for where the toilet would go, so best case I was hoping for is dig floor around the current bath drain and change fitting to toilet, assuming of course the pipe to outside was big enough. If so I would imagine the cost is not that significant as opposed to having to replace all the pipes in the bathroom. PS I am in the ACT. Re: Moving Toilet to Bathroom 5Jul 19, 2013 10:18 pm Sorry to be the party pooper, but its not that simple. Your bath pipe will more than likely be a 40mm pipe, and that will usually go to a central trap built into the floor waste. Your toilet will need a 100mm pipe all the way, and for obvious reasons can not discharge via a floor waste. In short, not all piping under the slab is the same size. It appears you are assuming all pipes underneath are the same size and reduced at the top of the slab. This is unfortunatly not the case. P trap out the wall as suggested is the cheapest and most effective way Re: Moving Toilet to Bathroom 6Jul 20, 2013 8:41 am 33amc Sorry to be the party pooper, but its not that simple. Your bath pipe will more than likely be a 40mm pipe, and that will usually go to a central trap built into the floor waste. Your toilet will need a 100mm pipe all the way, and for obvious reasons can not discharge via a floor waste. In short, not all piping under the slab is the same size. It appears you are assuming all pipes underneath are the same size and reduced at the top of the slab. This is unfortunatly not the case. P trap out the wall as suggested is the cheapest and most effective way Nah wasn't making any assumptions at all, I was asking the question, which you have answered, which is very much appreciated. Re: Moving Toilet to Bathroom 7Jul 20, 2013 11:01 am Quote: Your bath pipe will more than likely be a 40mm pipe, and that will usually go to a central trap built into the floor waste. I agree and why I suggested sealing it and going through the wall -- with the correct sized waste Arfur Hello everyone, I have a question regarding moving a chandelier after it has been mounted. The chandelier in question is quite large, measuring 4 meters… 0 72337 Looking at some of the designs on websites, they are all selling very similar products. I get that you want something stylish. It's worth looking for search terms like SaveH2O… 2 7006 Hey, I am wanting to add a second toilet to my house, bit we have limited room. There is a hallway/entry that is never used, so was thinking this could be an option. 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