On Tue, 06 Jun 2017 18:09:00 -0400, wrote:

Q1 : screwing the 3/4 shark onto the plastic bypass -
- a few wraps of teflon and snug it up good ?
- special cement ? brass - to - plastic ?

Q2 : cutting pex without a proper tool ?
- heavy razor knife and care to keep square ?

Thanks in advance.
John T.

Wish I had a photo link posted.