I forgot to add in that I have 2 of these installed
one on each valve. It's a drip manifold that splits the connection into 8.
on one of the valves, the pressure was so great that it blew out 2 of the unused/closed connections on the manifold. So I figured maybe the pressure is too strong, so I installed a pressure regulator on both of them and now that's fixed, but the pulsating still occurs after the pressure regulator was installed.