Gestational diabetes also known as gestational diabetes mellitus (GDM), is when a woman without diabetes, develops high blood sugar levels during pregnancy. Gestational diabetes generally results in few symptoms. It; however, increases the risk of pre-eclampsia, depression, and requiring a Caesarean section.
The first step of pressure testing is to make sure that all of the PEX tubing is undamaged and properly fastened to the manifold. The next step would be checking the fitting and manifold connections to ensure they are properly secured. If there are any connections that look like they should be re-done, then do so.
Should you determine this as the source of the difficulty, your only option is to upgrade the plumbing in your home with a PEX or copper repipe. In case the water pressure seems to be slightly lower at certain times through the day, you might be observing the consequence of a demand peak on the water system.