Fixing a badly rusted drain pipe
- Thread starter K9mlxj
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Jimbo
Plumber
A lot of what you see is crud buildup. You might try carefully scraping at it with a screwdriver. But don't touch it unless you can accept the possibility that you will poke a hole in the pipe!
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K9mlxj
Member
Guess I'm going to just clean it up the crud and get a Mesh Shower Stall Strainer (or something similar)... . Don't want to touch the old cast iron pipe... .
BTW, another sticky thing to fix: the screws on the drain
- one screw (top) the head is still there but it's pretty stuck (possibly due to rust). I tried using penetratrant, and then Vise Grip to hold on to the screw head and turned. Still could not turn it. Don't know if a screw extractor would help as the screw is so stuck.
- one head (see bottom) is a brass screw. The head is broken.
Any suggestions? Perhaps I need to drill thru' and recreate new thread?
BTW, another sticky thing to fix: the screws on the drain
- one screw (top) the head is still there but it's pretty stuck (possibly due to rust). I tried using penetratrant, and then Vise Grip to hold on to the screw head and turned. Still could not turn it. Don't know if a screw extractor would help as the screw is so stuck.
- one head (see bottom) is a brass screw. The head is broken.
Any suggestions? Perhaps I need to drill thru' and recreate new thread?
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K9mlxj
Member
Whew! I finally got the top screw with the the head on out with a Vise Grip and make it a quarter turn at a time -- slowly (took over an hour this way).
The only one left is the bottom brass screw--the head is gone.
Would a screw extractor work, or the screw size is too small for any screw extractor?
The only one left is the bottom brass screw--the head is gone.
Would a screw extractor work, or the screw size is too small for any screw extractor?
hj
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drill and tap it.
K9mlxj
Member
Thx--I'm going to get a snap-in shower strainer next afterward -- just less trouble than using the screw-in strainer in this spot (it's going to pick up rust from the cast iron pipe later even after I fix it...).
K9mlxj
Member
By the way, I see there're also those left-handed drill bits.
I wonder if they work well, or just use a regular drill bit and then use the screw extractor is better to extract the damaged headless screw --thx.
I wonder if they work well, or just use a regular drill bit and then use the screw extractor is better to extract the damaged headless screw --thx.
Cacher_Chick
Test, Don't Guess!
The brass screw will drill through like butter. Use a drill bit that is a size smaller than the thread size and then run a properly sized tap through it to clean the brass out of the threads. Use brass or stainless replacement screws.
K9mlxj
Member
I broke the cast iron thing. 
The other broken piece fell into the drain pipe.
I fixed the other side earlier so I can put screw into the other end. But this end is broken now.
I wonder what I can do.
Is there some kind of kit to replace the broken support so that for the strainer I can put a screw in that same spot on the cast iron pipe?
Thx... .
The other broken piece fell into the drain pipe.
I fixed the other side earlier so I can put screw into the other end. But this end is broken now.
I wonder what I can do.
Is there some kind of kit to replace the broken support so that for the strainer I can put a screw in that same spot on the cast iron pipe?
Thx... .
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Cacher_Chick
Test, Don't Guess!
At this point I think I would look for a snap-in strainer unless/until you are ready for a shower remodel.
K9mlxj
Member
I screwed in too hard... (my mistake!)
The 10 year old shower is in very good shape, looks nice/no leak, etc. So won't need to remodel until a good while later.
As for the other end, it already has rust building up around that new stainless steel screw I just put in two days ago (I did pour in some drain cleaner the other day). This tells me the rust issue from the cast iron pipe might be an endless problem in any case and will cause the screws to stick again later even if I managed to make a new hole this time.
So perhaps a snap-in strainer is a good choice regardless... .
The 10 year old shower is in very good shape, looks nice/no leak, etc. So won't need to remodel until a good while later.
As for the other end, it already has rust building up around that new stainless steel screw I just put in two days ago (I did pour in some drain cleaner the other day). This tells me the rust issue from the cast iron pipe might be an endless problem in any case and will cause the screws to stick again later even if I managed to make a new hole this time.
So perhaps a snap-in strainer is a good choice regardless... .
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