Teflon tape on PVC??

Teflon tape on PVC??

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So as I plan my 150 build I have been watching numerous Youtube videos on tank plumbing and I see most people are using Teflon tape on their threaded connections. Is this a good idea? Because I thought the Teflon tape was for brass/metal fittings and using it can put too much stress on the PVC. I'm pretty sure they make a paste for PVC don't' they? Anyone want to chime in? Thanks...

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In the process of putting together a 150 gallon mixed reef. Ill keep you posted.

Current Tank Info: 55 Gallon

I am interested in the fact that LASCO and Spears recommend the use of sealant on PVC threaded pipe and strongly discourage the use of tape.

This goes against a lot of old timers here that tend to use sealant on metal and tape on PVC. And now a days, many seem to use both (forbodden by Spears).

LASCO: [www.lascofittings.com] (view more links by going to support Center....installation....)

"Teflon tape, Teflon paste and pipe dope is intended for metal pipe and fittings. Metal to metal fitting joints are more difficult to tighten than plastic; the surfaces tend to gall without the aid of such lubricants as Teflon or pipe dope. Plastic fittings do not need this lubrication.

When Teflon tape is wrapped around plastic male threads it adds to the strain and tensile stress. The tendency of most installers is to incorrectly wrap several thickness of tape around the male threads, increasing stain and stress further.

Teflon paste and pipe dope, just like Teflon tape, make threaded joints slippery. Their use on PVC fittings can be an invitation to over-torque.

When working with threaded plastic fittings do use a proper sealant. The right sealant for threaded joints is non-hardening, compatible with plastic and doesn't add slipperiness."

And Spears: [www.spearsmfg.com]

"Paste-type thread sealants fill the threads better than tape. Application is less critical"



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