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- 21 Sep 2007
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I recently ordered several fittings and ended up combining polypropylene and polyvinyl chloride. All the fittings were threaded and included elbows, couplings, nipples, and bushings.
I found that several of the fittings did not seal even though I used Teflon tape. The fittings felt loose too, as if the threads did not tighten together.
All fittings were NPT pipe (no tube fittings were used).
I've been suspecting that it is not okay to mix different types of plastic; is this correct?
Could mixing different schedules be the cause of my problem?
If not, does anyone have ideas on what other causes my problem might have?
If it is okay to link to distributor sites I'll post the part numbers/links.
Any help would be appreciated!
Thanks,
David
I found that several of the fittings did not seal even though I used Teflon tape. The fittings felt loose too, as if the threads did not tighten together.
All fittings were NPT pipe (no tube fittings were used).
I've been suspecting that it is not okay to mix different types of plastic; is this correct?
Could mixing different schedules be the cause of my problem?
If not, does anyone have ideas on what other causes my problem might have?
If it is okay to link to distributor sites I'll post the part numbers/links.
Any help would be appreciated!
Thanks,
David