Installing a bathtub on concrete floor

No, it's not normal. I suspect you missed one of the early steps in the installation. The bottom of the tub needs to be fully supported. We often use mortar to set the bottom of the tub so it doesn't move. If you did that, the whole floor may be sagging under the weight. We see this sometimes in houses built to minimum code.

This is a fairly big job but can be done if you have the right tools and a little bit of time....... Depending on the existing tub material (cast iron,fiberglass, tin type ). You will want to remove faucet trim(handles,spout) first. Then the over flow plate on tub,as well as drain in the bottom (this will require a drain removal wrench or pair of needle nose pliers and screw driver, and some strong arms).After this is done remove tub unit , if the unit is a cast iron unit a good sledge hammer will work as you will need to break into halves to remove unless your trying to save tub and provided you can then get the unit out the door in one piece...... Caution, protect body and eyes in this process, flying pieces of cast iron can do some damage to body......cutting tub will take several blades and take quite a while to do......The next step depends on the location of faucet and if you are replacing the tub faucet or going to use the existing faucet.... I would recommend a new faucet because if this is going to be a shower only you may want to raise the faucets so they will be easy to operate without having to bend..Depending on the model pre-fab (two piece,three piece) unit you wish to install you may need to prep the drain to make sure it will fit your new installation. Let me explain... most tubs have the drain located at the right/left end of tub and the showers are located in the center of the unit thus leaving you to relocate the drain. If house is on slab it means a little jack hammering the concrete to provide this, if the floor is a conventional it means re-routing the drain to the center.......once all this is accomplished you are ready to install unit base,connecting drain. Next you need to get the faucet located to the right height or be able to get to the back side of the shower and remove the existing faucets and replace them after you install surround.....turn off water supply before removing faucet..... A sturdy surround will make for a less involved support system around shower area.Be sure to leave enough space between studs for faucet attachment. Sounds like a lot of work and it is but after its done you will have a great bath shower..... hope this was helpful.... sorry this only dealt with the plumbing aspects of the job......

Right hand and left hand refer to where the drain is located to where you are standing in front of the tub.
if you are standing in front of the tub and the drain is on your right hand then it is considered a right hand tub.

My suggestion is to build up the floor where the tub will be maybe 12" above original floor and u can make a couple steps up to the tub the whole length of tub

If it is leaking from around the flange then you will need access to the under side of the tub drain to 1) tighten the drain connection or 2) replace the tub drain connection or 3) remove the drain, clean it and replace it again properly with the rubber washer and plumbers putty.

Now I see the wood stud is added support and the tub should rest on it. though it is not to hold the tub up. Like a man using a cane the cane doesn't keep a man standing by itself. Rather it helps a person be more stable that's what the stud does. Set at height for a level tub.

Here is a trick as well for supporting the back of the tub (Shimming) Get some of the expandable foam. Set everything in place like the wood ledge when you have everything in place and tub pre-fitted. Remove tub and place a line of foam along back side. Place tub in place and when foam expands and dries it will become your perfect shim. Hope this helps, thanks for using FIXYA. Good luck, Jeff

The answer is yes.Most of your moble homes have poly or fiberglass tubs with litttle or no bracing under them and the floors are made out of a fiber type board. When they get wet they warp, crumble and fall apart, so if water has gotten under the tub there isn't much of a floor under it. But yes it can be repaired. She will have to remove the old tub and the wall board around it And probably have that portion of floor replaced.

The tub should just sit on the floor, and caulked around to seal out any water. If it as a fiberglass tub, you might want to put some grout under the bottom to help support it.

it is generally not allowed under the water regs to discharge waste water into anything other than a drain.I would suggest you install a discharge pump, typically the saniflow type which will allow you to run the waste across the room and discharge the waste into the vanity basin drainage.Should you choose to install this be aware of the waste pipe configurations shown by the instructions