Cash AcmeEB45 Pressure Regulating Valve, 3/4 Inch NPT Threaded, Poly Top, 45 PSI, 23881-0045

I spent an entire day installing this, adjusting it, diagnosing why it caused a pulsed water flow and continuous hammer-shock on every one of my 5 valves, talking to Cashe-Acme tech support (twice), and finally - removing it and sending it back. What a waste of time. It seemed like Cashe-Acme knows about the problem. It may work for you - or it may not (you'll know immediately due to the banging sounds and vibration in your pipes). I installed another brand that works beautifully.