Question about application of teflon tape


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Old 04-16-10, 08:26 PM
J
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Question about application of teflon tape

Hi! I'm trying to install a gas dryer and I'm not sure where I'm supposed to apply the yellow gas teflon tape. I was under the impression that it's supposed to be applied wherever metal meets metal, but the instructions for the gas line state "DO NOT apply pipe thread sealant or tape to flare ends of fittings or valves. (Figure 1) Sealant and tape will prevent this connection from sealing properly."
Instructions

The brass and silver adapters came with the gas hose. The brass one has a safety valve in it to prevent gas from flowing too quickly. I've already applied teflon tape at (1).
Fittings

Where is the teflon tape supposed to be applied?
 
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Old 04-16-10, 08:37 PM
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Well looking at your picture of the valve and adapter: you CANNOT screw that adapter onto the flare end of the line valve. Unless it is marked that it is intended for that use. The male flare threads will not be compatible with the adapter female threads. This will either leak immediately or very soon. Teflon must be carefully used in this application, you don't want any to get inside the pipe and eventually into a gas control or impede the gas flow. Teflon should be used on threads such as in #4 on your pics. I think you may be in need of help and I would consider calling your local gas co and once they come out have your wife sweet talk the serviceman into hooking up the dryer or maybe they do it as a service.
 
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Old 04-16-10, 10:40 PM
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The brass one goes on the gas valve side and the silver one goes on the appliance side. I'm not sure if the silver one is even needed as I haven't unboxed the dryer yet.
 
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Old 04-17-10, 09:50 AM
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You want to use teflon take or pipe thread compound on iron pipe nipples only. You do not want to use teflon tape on the flare fitting adaptor or the thread thread that holds the flare fitting together.

So the picture with teflon tape used on the screw threads of the flare fitting are wrong --- no tape there.

The idea is that the flare fittings are gas tight by themselves when properly installed.

Now if you have a flare fitting with an iron pipe thread on the other end of it, use teflon tape on the iron pipe end only. Other parts of the pictured fittings would illustrate that.
 
 

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