Cage units contain all of the working parts of a thermostatic steam trap, including the seat, within a stainless steel housing. Cage units are one-piece, stand-alone, fully-removable units. This allows for removal and testing of the element outside of the original trap body. No special tools needed for installation. Cage unit are available for a wide variety of makes, styles, and sizes of thermostatic steam traps for low, medium, and high pressure service.

Find manufacturer-specific product information

Category Products

  • 50+ in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 02H, 502, 513, and 702H3 traps. This cage unit requires a new cover when first installed.

Online Price: $47.88
Regular Price: $51.76

  • 18 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Barnes & Jones 41T, 42T, 653, and 654 steam traps.

Online Price: $42.45
Regular Price: $47.17

  • 50+ in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Barnes & Jones 122A and 122S steam traps.

Online Price: $47.88
Regular Price: $51.76

  • Ships within 2 business days

Hercules cage unit for B&J 122A and 122S steam traps. This cage unit replace the existing thermostat and seat. It features a 7-coil bellows assembly, a heavy duty element, and seats surrounded by a stainless steel cage to protect against system debris.

Online Price: $77.70
Regular Price: $86.34

  • Ships within 2 business days

Barnes & Jones cage unit for Barnes & Jones C series steam traps.

Online Price: $42.45
Regular Price: $47.17

  • 13 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Barnes & Jones 51T, 52T, FT2015, and FT2030 F&T traps.

Online Price: $42.45
Regular Price: $47.17

  • 10 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Barnes & Jones FT2075, FT2125, and all FTI series F&T traps.

Online Price: $59.25
Regular Price: $65.84

  • 17 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 712HB and 119T traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 10 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 22H5 traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 11 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Marsh #1, #8, and #12 traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 49 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Barnes & Jones 123 and 134 traps. This cage unit requires a new cover when first installed.

Online Price: $47.88
Regular Price: $51.76

  • Ships within 2 business days

Hercules cage unit (requires new cover) for B&J 123 and 134 traps. This cage unit replace the existing thermostat and seat. It features a 7-coil bellows assembly, a heavy duty element, and seats surrounded by a stainless steel cage to protect against system debris.

Online Price: $77.70
Regular Price: $86.34

  • 6 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Illinois #1 traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 38 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Mepco (formerly Dunham-Bush) #1 and #1A traps. This cage unit requires a new cover when first installed.

Online Price: $47.88
Regular Price: $51.76

  • Ships within 2 business days

Hercules cage unit (requires new cover) for Mepco #1 and #1A traps. This cage unit replace the existing thermostat and seat. It features a 7-coil bellows assembly, a heavy duty element, and seats surrounded by a stainless steel cage to protect against system debris.

Online Price: $77.70
Regular Price: $86.34

  • 11 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Barnes & Jones 43T, 44T, and 457T traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 12 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Mepco (formerly Dunham-Bush) #2 traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 11 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Trane model B2 traps.

Online Price: $42.45
Regular Price: $47.17

  • 7 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Trane model B3 traps.

Online Price: $42.45
Regular Price: $47.17

  • 7 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Adsco B series traps.

Online Price: $42.45
Regular Price: $47.17

  • 4 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Marsh #2 traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 6 in stock
  • Ships within 2 business days

Brass cover for Barnes & Jones part number 1971 cage units.

Online Price: $16.27
Regular Price: $18.08

  • Ships within 2 business days

Hercules cage unit (requires new cover) for Warren Webster 02H, 502, 513, and 702H3 traps. This cage unit replace the existing thermostat and seat. It features a 7-coil bellows assembly, a heavy duty element, and seats surrounded by a stainless steel cage to protect against system debris.

Online Price: $77.70
Regular Price: $86.34

  • Ships within 2 business days

Barnes & Jones cage unit for Marsh #1 reflux traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • Ships within 2 business days

Barnes & Jones cage unit for Mepco (formerly Dunham-Bush) #3 traps.

Online Price: $42.45
Regular Price: $47.17

  • Ships within 2 business days

Barnes & Jones cage unit for Bishop, Babcock & Becker B and BB series traps.

Online Price: $59.25
Regular Price: $65.84

  • 9 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 533 and 534 traps. This cage unit requires a new cover when first installed.

Online Price: $59.25
Regular Price: $65.84

  • 9 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 522, 523, 22H5, 522HB, and 533HB traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • Ships within 2 business days

Hercules cage unit (requires new cover) for Warren Webster 522, 523, 22H5, 522HB, and 533HB traps. This cage unit replace the existing thermostat and seat. It features a 7-coil bellows assembly, a heavy duty element, and seats surrounded by a stainless steel cage to protect against system debris.

Online Price: $77.70
Regular Price: $86.34

  • 43 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Mepco (formerly Dunham-Bush) 2E 3/4" traps. This cage unit requires a new cover when first installed.

Online Price: $47.88
Regular Price: $51.76

  • Ships within 2 business days

Hercules cage unit (requires new cover) for Mepco 2E 3/4" traps. This cage unit replace the existing thermostat and seat. It features a 7-coil bellows assembly, a heavy duty element, and seats surrounded by a stainless steel cage to protect against system debris.

Online Price: $77.70
Regular Price: $86.34

  • 6 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 733 and 733HB traps.

Online Price: $59.25
Regular Price: $65.84

  • 4 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 722 and 722HB traps.

Online Price: $42.45
Regular Price: $47.17

  • 29 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 512, 512HB, and 513 traps. This cage unit requires a new cover when first installed.

Online Price: $47.88
Regular Price: $51.76

  • Ships within 2 business days

Hercules cage unit (requires new cover) for Warren Webster 512, 512HB, and 513 traps. This cage unit replace the existing thermostat and seat. It features a 7-coil bellows assembly, a heavy duty element, and seats surrounded by a stainless steel cage to protect against system debris.

Online Price: $77.70
Regular Price: $86.34

  • 5 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Bishop, Babcock & Becker G series traps.

Online Price: $42.45
Regular Price: $47.17

  • Ships within 2 business days

Barnes & Jones cage unit for Bishop, Babcock & Becker #6 Multiflex series traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 544 traps.

Online Price: $59.25
Regular Price: $65.84

  • 12 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 545 traps.

Online Price: $59.25
Regular Price: $65.84

  • Ships within 2 business days

Barnes & Jones cage unit for Warren Webster 422 and 513A traps.

Online Price: $42.45
Regular Price: $47.17

  • Ships within 2 business days

Barnes & Jones cage unit for Marsh #1 Reflux traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 10 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Monash 34, 35, and 35B traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 1 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Marsh #2 and 2-7 traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 4 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Hoffman Specialty 18A traps.

Online Price: $42.45
Regular Price: $47.17

  • Ships within 2 business days

Barnes & Jones cage unit for Bishop, Babcock & Becker B and BB series traps.

Online Price: $42.45
Regular Price: $47.17

  • Ships within 2 business days

Barnes & Jones cage unit for Barnes & Jones V12, V120, and V122 traps.

Online Price: $42.45
Regular Price: $47.17

  • Ships within 2 business days

Barnes & Jones cage unit for Mepco (formerly Dunham-Bush) #3, V2, and V3 traps. This cage unit requires a new cover when first installed.

Online Price: $42.45
Regular Price: $47.17

  • 50+ in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Hoffman Specialty 8A traps.

Online Price: $42.45
Regular Price: $47.17

  • 2 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Barnes & Jones medium pressure (from 30 to 100 psi) F&T traps.

Online Price: $42.45
Regular Price: $47.17

  • 9 in stock
  • Ships within 2 business days

Barnes & Jones cage unit for Mepco (formerly Dunham-Bush) 2B, 3A, and 3C traps. This cage unit requires a new cover when first installed.

Online Price: $47.88
Regular Price: $51.76

Page 1 of 5

Category Information