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How To Clean Rust From Cast Iron Threads

DIYSEN

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  • #i

Could somebody offer a suggestion on removing a galvanized nipple to a rusted cast iron P trap for a bath tub. Drain system is under a concrete slab. I intend to supercede the tub due to corrosion & rust.Is it also possible that the threads on the trap are gone due to corrosion that makes reconnection w/
new pipe impossible?:confused:

  • #ii

Squirt it repeatedly with Lead Blaster penetrating oil, for about ii days. You will need a 24" piping wrench minimum. You still might break something.

nipple-rusted.jpg

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hj

hj

Chief Plumber

  • #three

pipage

How large a hole will he take to make in the slab to go, and turn, a 24" wrench? And what are the chances the trap volition snap if he uses that much torque? Cutting the nipple out with a SawZall. If you cannot effigy out how to do information technology, phone call a plumber who does. Your thread in the trap is probably still good. IF non the nipple would have only pulled out or turned easily.

DIYSEN

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  • #4

HJ, JIMBO
I capeesh your help & thanks.Will pre heating the connection w/ propane
torch help loosen fittings & where could I get the Atomic number 82 blaster penetrating oil
since this is my beginning time hearing this type of oil. I know of WD40.
Cheers again.

  • #5

PB blaster is pretty common. WD40 helps, but is not a true penetrating oil, although it is often used as such.

Heat on the trap might help, just hj'south point well-nigh merely cutting it and joining new with banded couplings makes sense besides.

  • #6

PB Equalizer is available at most hardware stores. It is meliorate at penetrating than WD 40, just I concur with the proposition about the recip saw and banded coupler option beingness the meliorate choice.

Source: https://terrylove.com/forums/index.php?threads%2Fcast-iron-galvanized-pipe-rusted-connection.24769%2F

Posted by: farriertopectepech.blogspot.com

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