remove bathtub drain

I live in a old condo. My condo has two bathtubs adjacent to each other, separate by a wall.
The tub drains are rusted and I'd like to replace it. A plumber came and said it has no access to the tubs, therefore, he needs to knock down the wall, the tiles, and replace the entire drain system in order to replace the drain. I was able to take out only one drain and took it to Home Depot but they don't have the same size. The other tub, I can't get it out even with the tub drain removal tool (bought it from Home Depot). When I told the plumber that, he said I can damage the condo below with the water leaking because it needs to replace to entire system rather than just the drain itself.
My question are: 1. Can I just replace the drain or the entire system? 2. If I can just replace the drain, what do I need to do to ensure the water won't leak.? 3. Where can I get the drain which fits the existing drain pipe, Home Depot and Lowe don't carry it? I live in Houston, TX 4. How can I take out the old drain from the other bath? I used the screw driver and inserted it horizontally to the tub drain removal tool and can't get it out. Is there an easier way?
Your help is greatly appreciated.
April
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
I did it once, so I'm an expert:
1. Must replace the whole thing.
2. It'll leak. Replace the whole thing. And hope it doesn't leak when you're done.
3. Plumbing supply shops will carry more fittings than HD.
4. If it won't come loose with the tool then perhaps you can sawzall it off from the bottom.
There's no other way to get to the underside of the tub? Perhaps through a wall of your neighbor's place? Tearing out tile seems extreme, but it's quite normal to have to do some drywall work.
I replaced one because it leaked. The whole process was such a pain in the ass that I'd never do it for cosmetic reasons. It was every bit as bad as digging a deep 40 foot trench with a shovel.
-rev
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Arpil wrote:

IMHO you are taking big risks because you will be responsible for any damage to the unit below.
That said, sometimes the drain fitting simply won't come out because of corrosion in the threads. Then it's time to get out the Sawzall. Blade vertical, *inside* the drain. Make maybe 6 cuts thru the "side" of the drain till it almost cuts the tub. That will weaken it so it can be pried out.
The bad news is that you may have to replace the tub "shoe" underneath if you cut thru it.
PLAN "B": Heat the drain fitting with torch. Cool it rapidly with cold water to shrink it. That should loosen threads.
There is a round rubber gasket *under* the tub which seals the tub shoe to the tub and prevents leaks; don't forget to replace it.
NOTE: I am not recommending you actually *do* any of the above. Heed what your plumber said.
Jim
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Thanks Jim and Rev for your advice.
I won't touch that thing. As I said, it's merely cosmetic.
April
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Rusty you say. Try cleaning with wire brush tip on dremel to get a brushed finish then clear coat with clear nail poilsh or brass sealer.
I hear MAAS metal polish works very well on almost any metal.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Well, I hate to discourage anyone from a DIY project, but out of all the things I've tried since buying an old house, that was the worst.
Tear out the wall. Spend half the weekend shoulder deep between 16" studs trying to get the thing to stop leaking. Resoldered the connections, replaced the gaskets, finally flung the whole contraption out across the yard and picked up a new one from HD. Rest of the weekend cutting, bending, fitting. Finally, in desperation, used a rubber coupling to fit the new drain to the old cast iron pipes. All for a tub I don't even use! Another one is leaking now (girlfriend HAD to fill the damn thing to the overflow, now I have to repaint the kitchen ceiling). I'm going to fill that one with rocks and concrete and be done with it!
-rev
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
The Reverend Natural Light wrote: <SNIP> Another one is leaking now (girlfriend HAD

LOL Good one...
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.