New Attic Bathroom

Hi I have a couple of questions on the a new bathroom we are adding upstairs. The 3" drain comes up from the downstairs bathroom into the new bathroom. We have build a rised floor that the tub and shower will sit on due to a hardline duct running under the tub and shower. Is this how you would also do this? next, my son the fix it man does not think we have to have traps under the shower or the tub i beleive we do. and we plan to run the vent after the tolit just at it is in the picture with the exceptions that a 3" will run to the tolit and than change to a 2" for the vent will this work ok?

Thanks for your help, i have upload a pic hope it helps.

BJ

Can't make out your sketch too well, but here are two comments:


1)If the line coming up from downstairs is the vent, you cannot drain your upstairs bathroom into that.

2)Having toilet and tub on a raised platform screams hackjob. It wll affect the future sale value of your house.

3) You absolutely MUST have a trap under each fixture ( except toilet which has built in trap. )

piping

Fire your son, and then hire someone who knows something about drains and venting, because from what I can decipher on your drawing, very little, if anything, is acceptable to the plumbing codes or good practice. Stating with the fact that you cannot just connect a second floor bathroom to the pipe coming up from the first floor.

What we are trying to point out to you is that there are some very complex issues involved in what you want to do. Some of these are just appearance, but most of them can be very serious if not done properly. Here's something you should realize. Often DIY say that they are not too worried about codes because they are not going to have it inspected. But when the day comes you want to sell this house, all of the non code issues must be removed or repaired before a lender will advance money to the buyer. It is just as likely that you will miss somethings that will cause problems as you try to use it. Best advice I can offer is to hire a professional plumber. BTW, have you even considered the extra weight you will be placing on the rafters of the ceiling below?

Plumbing is the least of your problems.

A bathtub holds 40-60 gallons of water. At roughly ten pounds a gallon, that means 400 to 600 pounds. Add a human, another 150-200 pounds, you're up to 550 to 800 pounds. Divided over the 12-1/2 square feet a normal bathtub occupies... 44 to 64 pounds per square foot.

You're talking about adding 44 to 64 pounds per square foot, to a floor that was likely designed for 20 or 30.

Thanks

Thank-you all very much, I really did not like how they were doing the bathroom anyway; I do not have the money to pay a professional, we did have a very good friend that was going to help us but he has since moved out of state. We did have the building inspector come out to insure the placement was ok and he said it is the best spot possible with two load bearing wall underneath. My husband has done plumbing repair and also done bathroom shower remodels but has never had to tie into a anything because they only removed the area that needed to be and replaced it if any at the time. Sorry the pic was not very good the rafts long the width of the bathroom so my husband decide it was a good idea to build the riser as a step and to double for room for the plumbing due to the hard line duct that runs under the tub and shower he also did not think he could cut through the rafts so not to weaken them. The line running but from the downstairs bathroom is a 3†that go to a 2†then vents out the room. Thank-you All and any help is very much appreciated. I have included a better pic.

BJ

I don't mean to be offensive, but if you can't afford to have a professional job done, perhaps you shouldn't do it. Start a special savings account so you can do a proper job.

bath

quote; call a small remodeling contractor. Depending on your attic, the placement of the vents and how much wiring is involved, it will take up to two days to install a bathroom vent fan. thanks...

Just because we are "small" does not mean we have to work "cheap". We have the same expenses that a large one does, and maybe more because of economies of scale, but HOW IN THE WORLD can it take 2 days to install a bathroom vent fan? Essentially you nail it in place, connect a wire, and the run the duct to a suitable location. If that cannot be done in a matter of a couple of hours, fire the installer.