02:04PM | 09/28/04
Member Since: 09/27/04
1 lifetime posts
House built in 1978, the bathroom on the first floor has a broken brass flange which has seperated off from the lead soil pipe. The flange was set slighly below the floor tile that was installed several years ago. The lead soil pipe seems to be secured to the cast iron (I think)waste line...not sure how...there does not seem to be enought good lead to rejoin the brass flange which seems to have been welded on to the lead pipe. Where does a DIY goe from here...Also need to mention that we are dealing with an offset flange. Does anyone make an offset flange with a "twist and set" type set up similar to the straight flange Oatey makes and could it be use in this application.


06:06AM | 09/29/04
We solder brass flanges to lead pipe using 50/50 solder with lead in it. You can buy a deep set flange than extends lower to where you can get good lead. If you do not have a finished ceiling you can just beat the lead tight onto the flange. However this doesn't meet code and you can get air leaks and eventually water leaks.

We tin the brass flange first, cut the lead to where it is shiny to remove oxidation and use candle wax or solder flux. Careful. The torch has to have a low enough flame to get the brass hotter than the lead without melting the lead. You need to get both materials hot enough to melt the solder into them both. Direct the torch at the lead and you will have a hole in the pipe.

It would take a plumber that offers this service an hour charge.

The internal expanding repair flanges aren't recommended for lead because the lead continues to expand with time and you stink and leak.

The preferred repair would be to cut the cast iron and rerun a plastic line without the offset.
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