How do pipes not burst when you turn off a faucet. Shouldnt all that stopped up water build up pressure and explode?

Question

How do pipes not burst when you turn off a faucet. Shouldnt all that stopped up water build up pressure and explode?

In:

Answer 1

Pressure reducing valve in the main line into the house drops pressure to 35ish psi. To pass the building inspection we put at least 100psi on the whole water system for at least 15 minutes.

Most of the time, even without a pressure reducing valve, you won’t see over 40psi. The only issue comes if there’s no check valve and you happen to be right next to a fire hydrant that gets opened frequently. The line is so big the water kind of “pulses” out and that will create back pressure and damage pex fittings or crimp rings.

All this is eastern NC