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The following picture shows a filter module on my shower mixing valve. The piece won't unscrew and the 10mm Allen socket is stripped. I tried heating the piece with a heating gun but it didn't make any difference.

At this point, what our my options for removing this piece?

enter image description here

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  • Brass is soft. Before you stripped the bolt head, you needed some sort of penetrating oil (WE-40™, PB Blaster™, or the like) to try to get into the threads to loosen any gunk built up and lubricate. Now, probably your best bet is crip659's mechanical methods or a full on replacement.
    – FreeMan
    Feb 17 at 12:14

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Choices for that problem are to force a bigger(11mm) allen wrench/allen socket tip in, maybe with the help of a hammer.

If possible cut a slot in the top for a flat bladed screwdriver.

After watching the video, might be able to drill two holes on the sides of the head and use two rods/needle nose pliers to turn the head.

Use a drill and drill out the screw/bolt.

Not quite sure but soldering/silver soldering/blazing a nut on top might work.

Will depend on how tight that screw/bolt is in the threads.

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  • Video? I missed a video??
    – FreeMan
    Feb 16 at 22:59
  • @FreeMan Was in the question OP asked earlier on removing the other filter.
    – crip659
    Feb 16 at 23:01
  • @crip659 The crew is extremely tight - before I stripped the socket, I could put my entire weight of 225lb on the 10" long allen key.
    – Wynne
    Feb 17 at 0:56
  • Might just have to go with drilling out that screw if that tight. That is almost enough to put a curve in the key.
    – crip659
    Feb 17 at 1:02
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    Penetrating oil plus tapping with a hammer might help, but you do not have a good turning connection point any more. Check with the filter that does come out and see if there is enough metal to drill two holes to place steel rods/allen keys and to use a wrench/piece of metal to turn.
    – crip659
    Feb 17 at 1:35

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