I've been pointed to the Watts 3/4" pressure reducing valve. What style is best? This will go in the main pipe where the water enters the house. My house pressure is 90. I see two styles that have a factory default of 50 psi at both Home Depot and Lowes -- FPT X FPT brass (LF25AUB-Z3). Or the MPT X FPT (LFN45BM1-U). They each have different openings sticking out the bottom.