How to Order

Meter units have a letter and number designation stamped on the flat surface of the hexagonal body. When ordering, specify the complete name and part number.

The first letter of the meter unit identifies the type of threads on the unit. Meter units that begin with the letter “A” denote metric thread - 5 lb check valve.

Threaded into a junction or junction header with a tail tube leading to the bearing. The inlet thread on the “FJ-” meter unit is 5/16-24 to mate with standard junctions and junction headers. The “AJ-” meter unit has the metric-M8xl thread which is very close to a 5/16-24 thread. There are three different “Junction” types identified by the third letters “B”, “C” and “D”. Type “-JB” is the most commonly used meter unit and has a 5/16-24 or M8xl outlet thread for a 5/32 tail tube to the bearing. The type “-JC” also has a 5/16-24 outlet thread but has a tubing connection insert for a 3/32 dia. tail tube. Type “-JD” are thinner than standard junctions and also have closer hole spacing. Type “-JD” are made from 5/16” hexagon bar and have a 1/4-28 outlet thread to accommodate the 5/16 hex compression nut #B3610.