[Shop-talk] Helicoil for plastic?

[Jeff Scarbrough]

Why not use a HeliCoil?  They come in 8-32 and 10-32...among other sizes...

Jeff Scarbrough
Corrosion Acres, Ga.
On Thu, Sep 20, 2018 at 12:35 PM Jim Stone <1789alpine at gmail.com> wrote:
>
> This is not an exact answer to your question , but I have done similar repairs - although non plumbing -  in the past with JB Weld. I cleaned the female threads well and then worked just enough JB into the threads. I put a light coating of oil on the male threads, screwed them together and then let it set.  Unscrewing the first time can be a little difficult, but I’ve always been able to and have been able to reuse the threads.
>
> While I’ve never done a plumbing repair this way, I can’t see why it wouldn’t work. My inclination would be to put a thin wrap of Teflon tape on the male portion and then just leave it alone and hope for the best if I ever had to remove it.  Worst case, you are back to your original plan.
>
> Sent from my iPhone
>
> > On Sep 20, 2018, at 9:55 AM, Scott Hall <scott.hall.personal at gmail.com> wrote:
> >
> > Background: all the sink and shower faucets in the house are an unidentifiable manufacturer. The house was sitting long enough that they're all "sticky"--don't want to operate. They pull "up and down" or "in and out" to control water flow, then rotate to control temperature, not the "ball" type that pivot up to control flow, then swivel. I've never seen the kind I have before.
> >
> > They're all sticky (don't want to turn on/off), but the worst is the bathroom shower I'm using. I've pulled out the control knob several times. It is fastened to the control valve with a stainless screw into what looks like the phenolic valve. I suspect that I'm destroying the screw threads in the valve each time this happens.
> >
> > My initial plan was to cut into the wall behind the valve and just replace the entire assembly. Advantage: I know how to do that. Disadvantage: yet another distraction.
> >
> > However, maybe I can use a threaded insert to hold this handle into the valve for now. Googling "plastic helicoil" doesn't help much and I don't think I know the right vocabulary. Anyone have a suggestion for keeping this handle stuck to its valve and functioning as a shower for six months or so until its associated bathroom gets gutted anyway?
> >
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