Akron Brass HH-Pitot [HH-PITOT] Hydrant Pitot with Case. Hand held units are designed to measure straight tip or hydrant flow pressures to determine the actual PSI. The PSI reading may then be converted to GPM by referring to the provided chart. Heavy duty aluminum blade and stainless steel pitot tube Pitot blade has numbered increments for increased accuracy Conveniently located bleeder valve 3 1/2" liquid filled 0-160 psi (0-1100 kpa) gauge, 2 p.s.i. (20 kpa) increments, 1% accurate full scale Heavy-duty carrying case.