Renator RV Water Pressure Regulator for RV Camper. Brass Lead-Free Adjustable Water Pressure Regulator with Gauge for Camper Travel Trailer, Reducer Valve W Filter. M44-0660R.

I replaced that one because the pressure adjustment screw stopped working as well, and replaced it with one of their other ones that doesnt need a screwdriver. https://www.amazon.com/dp/B0DQLJYHXS?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2