... blower pressures, filter resistance, air velocity, furnace draft, pressure drop across orifice plates, liquid levels withbubbler systems and pressures ... 60°C)Mounting Orientation: Diaphragm in vertical positionConnections: 1⁄8" NPT(F) high and low pressure taps,duplicated-one pair ... plugs for duplicate pressure taps, two1⁄8" pipe thread to rubber tubing adapters and three flush mounting adapters with 3 ...