Parker/Watts QUBE Modular FRL Systems
  Parker/Watts QUBE Modular FRL Systems fasten together with mounting blocks, plates, and brackets.  QUBE systems offer sizes from 1/8" to 3/4".
Included in this line of Watts products are:
Particulate Filters, Coalescing Filters, Regulators, Lubricators, Integral Filter/Regulators, Combination Units, Valves, & all of the components required to modularize a complete system with any combination of parts.