Leaking thread on softener

[Virtualdodo]

Just installed a new whirlpool water softener everything went OK for th most part all my connections worked great, no leaks but the problem happens at the softener, I have 3/4" PEX going to the softener which is a 1" male NPt connection, so to preform this conversion i used a 3/4 x 1" sharkbite this connect my 3/4. PEX to a 1" Copper female threaded connection, put some Teflon on the plastic NPt connection threaded the Copper and I am getting dripping from my IN I have taken it off put on more Teflon put on less tightened it hand tight and wrench tight, nothing works just using Teflon tape on a blue roll if that means anything, my out is leaking to but almost not even noticeable like 1 drip every few min so not sure.

Any thoughts I am at my wits end here, I am hoping these Copper fittings aren't messed as they cost almost 30 bucks here.

I wanted a 3/4 PEX to NPt Male then just use a hose to connect which is what whirlpool shows on their site but the local hardware store looked at me like I had a horn growing out of my head.

Sorry for any grammar and spelling on my phone.