Amazon.com: MEANLIN MEASURE 0-15Psi 2" DIAL FACE 1/4" NPT Well Pump Pressure Gauge, with 1/4" x 1/2" NPT and 1/4" x 3/8" NPT Hex Bushing, 3-2-3% Accuracy,Center Back Mount : Industrial &
Amazon.com: Water Well Pump Liquid Filled Side Lower Mount Pressure Gauge 0 to 100 PSI, 1/4" MNPT : Industrial & Scientific