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Re: [Shop-talk] Helicoil for plastic?

To: Scott Hall <>,
Subject: Re: [Shop-talk] Helicoil for plastic?
From: Jim Stone <>
Date: Thu, 20 Sep 2018 11:33:03 -0400
References: <>
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 Iâ??ve always been 
able to and have been able to reuse the threads. 

While Iâ??ve never done a plumbing repair this way, I canâ??t see why it 
wouldnâ??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 <> 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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