Just a little FYI - one is not supposed to use teflon tape on threaded PVC fittings. Because of how the fittings are manufactured using teflon tape can, and often does, lead to leaks.
I've been lead to believe it's actually because the teflon tape allows you to over tighten the fitting, which causes the leaking. So it's indirectly, directly responsible haha.
@ATL REEF -- Either way, I might suggest plumbers paste instead. It does the same thing without allowing you to over tighten fittings.