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Category Products

  • Ships within 2 business days

AQS-1/2"Copper Aquastat for NRF/NBF pumps. OFF (open) 120F, ON (closed) 100F.

Online Price: $41.86
Regular Price: $44.75

  • Ships within 2 business days

AQS-3/4"Copper Aquastat for NRF/NBF pumps. OFF (open) 120F, ON (closed) 100F.

Online Price: $29.80
Regular Price: $31.85

  • Obsolete

Bell & Gossett AZ-1 pump controller.

This item is obsolete. It is shown for reference purposes only. Please call (877) 775-7705 for repair parts and replacement options.

  • Obsolete

Bell & Gossett AZ-1X pump controller.

This item is obsolete. Please visit the item's page to view 1 alternate item.

  • Ships within 2 business days

Model AZ-1A Pump Controller for thermostatically controlled heating pumps up to 1/6HP. 115 volt, 1ph., 24 volt, 5 amp relay.

Online Price: $78.89
Regular Price: $84.33

  • Ships within 4 business days

Z-1 Single-Zone Pump Control for hydronic systems. 120V, 24VA thermostat current.

Online Price: $115.91
Regular Price: $123.90

  • Ships within 4 business days

Z-2 Two-Zone Pump Control for hydronic systems. 120V, 24VA thermostat current.

Online Price: $197.20
Regular Price: $210.80

  • Ships within 4 business days

Z-3 Three-Zone Pump Control for hydronic systems. 120V, 24VA thermostat current.

Online Price: $209.26
Regular Price: $223.69

  • Ships within 4 business days

Z-4 Four-Zone Pump Control for hydronic systems. 120V, 24VA thermostat current.

Online Price: $329.99
Regular Price: $352.75

  • Obsolete

Z-4M Four-Zone Pump Control with mixing reset, for hydronic systems. 120V, 24VA thermostat current.

This item is obsolete. It is shown for reference purposes only. Please call (877) 775-7705 for repair parts and replacement options.

  • Obsolete

Z-4B Four-Zone Pump Control with boiler reset, for hydronic systems. 120V, 24VA thermostat current.

This item is obsolete. It is shown for reference purposes only. Please call (877) 775-7705 for repair parts and replacement options.

  • Ships within 4 business days

Z-6 Six-Zone Pump Control for hydronic systems. 120V, 24VA thermostat current.

Online Price: $362.18
Regular Price: $387.16

  • Obsolete

Z-6B Six-Zone Pump Control with boiler reset, for hydronic systems. 120V, 24VA thermostat current.

This item is obsolete. It is shown for reference purposes only. Please call (877) 775-7705 for repair parts and replacement options.

  • Obsolete

Z-6M Six-Zone Pump Control with mixing reset, for hydronic systems. 120V, 24VA thermostat current.

This item is obsolete. It is shown for reference purposes only. Please call (877) 775-7705 for repair parts and replacement options.

McDonnell & Miller model number 42S is a combination float-operated low water cut-off and pump controller for steam boilers that have a separate water column. This control features an automatic reset and two 120 volt, bi-metal, two-wire, single pole, single throw snap switches. Its maximum pressure is 50 psi and it has a tapped 1" FIP connection.

Online Price: $473.82
Regular Price: $552.79

McDonnell & Miller model number 42S-A is a combination float-operated low water cut-off and pump controller with quick hook-up fittings for steam boilers. This control features an automatic reset and two 120 volt, bi-metal, two-wire, single pole, single throw snap switches. Its maximum pressure is 50 psi and it has a tapped 1" FIP connection.

Online Price: $659.06
Regular Price: $768.90

McDonnell & Miller model number 42S-N is a combination float-operated low water cut-off and pump controller with 1/2" IP gauge glass connections for steam boilers. This control features an automatic reset and two 120 volt, bi-metal, two-wire, single pole, single throw snap switches. Its maximum pressure is 50 psi and it has a tapped 1" FIP connection.

Online Price: $552.19
Regular Price: $644.22

McDonnell & Miller model number 93M is a combination float-operated low water cut-off and pump controller with 1" FIP tapped connections for steam boilers with a separate water column. This control features a manual reset with standard number 5 single pole single throw switches. Its maximum pressure is 150 psi.

Online Price: $919.13
Regular Price: $1,029.43

McDonnell & Miller model number 93 is a combination float-operated low water cut-off and pump controller with 1" FIP tapped connections for steam boilers with a separate water column. This control features an automatic reset with standard number 5 single pole single throw switches. Its maximum pressure is 150 psi.

Online Price: $844.32
Regular Price: $945.64

McDonnell & Miller model number 93-7B is a combination float-operated low water cut-off and pump controller with 1" FIP tapped connections for steam boilers with a separate water column for low water cut-off and pump control, as well as, proportional control for constant boiler water level. This control features an automatic reset with optional number 7B single pole single throw switches. Its maximum pressure is 150 psi.

Online Price: $1,186.32
Regular Price: $1,328.68

McDonnell & Miller model number 93-7BM is a combination float-operated low water cut-off and pump controller with 1" FIP tapped connections for steam boilers with a separate water column for low water cut-off and pump control, as well as, proportional control for constant boiler water level. This control features a manual reset with optional number 7BM single pole single throw switches. Its maximum pressure is 150 psi.

Online Price: $1,225.50
Regular Price: $1,372.56

  • Ships within 10 business days

McDonnell & Miller model number 94A is a combination float-operated low water cut-off and pump controller with 1-1/4" FIP tapped connections for steam boilers with a separate water column. This control features an automatic reset with standard number 5 single pole single throw switches. Its maximum pressure is 250 psi.

Online Price: $967.58
Regular Price: $1,161.09

McDonnell & Miller model number 94M is a combination float-operated low water cut-off and pump controller with 1-1/4" FIP tapped connections for steam boilers with a separate water column. This control features a manual reset with standard number 5 single pole single throw switches. Its maximum pressure is 250 psi.

Online Price: $1,036.69
Regular Price: $1,161.09

McDonnell & Miller model number 94 is a combination float-operated low water cut-off and pump controller with 1-1/4" FIP tapped connections for steam boilers with a separate water column. This control features an automatic reset with standard number 5 single pole single throw switches. Its maximum pressure is 250 psi.

Online Price: $1,036.69
Regular Price: $1,161.09

McDonnell & Miller model number 94-7B is a combination float-operated low water cut-off and pump controller with 1-1/4" FIP tapped connections for steam boilers with a separate water column. This control features an automatic reset with optional number 7B single pole single throw switches. Its maximum pressure is 250 psi.

Online Price: $1,410.76
Regular Price: $1,580.05

  • Ships within 10 business days

McDonnell & Miller model number 94AM is a combination float-operated low water cut-off and pump controller with 1-1/4" FIP tapped connections for steam boilers with a separate water column. This control features a manual reset with standard number 5 single pole single throw switches. Its maximum pressure is 250 psi.

Online Price: $1,036.69
Regular Price: $1,161.09

  • Ships within 10 business days

McDonnell & Miller model number 94A-7B is a combination float-operated low water cut-off and pump controller with 1-1/4" FIP tapped connections for steam boilers with a separate water column. This control features an automatic reset with optional number 7B single pole single throw switches. Its maximum pressure is 250 psi.

Online Price: $1,410.76
Regular Price: $1,580.05

McDonnell & Miller model number 150S-M-MD is a combination float-operated low water cut-off and pump controller with maximum differential operation, which prevents nuisance burner shut-down in low pressure applications, for steam boilers with a separate water column.

Online Price: $530.82
Regular Price: $619.29

McDonnell & Miller model number 150S is a combination float-operated low water cut-off and pump controller with maximum differential operation, which prevents nuisance burner shut-down in low pressure applications, for steam boilers with a separate water column.

Online Price: $530.82
Regular Price: $619.29

McDonnell & Miller model number 150S-MD is a combination float-operated low water cut-off and pump controller with maximum differential operation, which prevents nuisance burner shut-down in low pressure applications, for steam boilers with a separate water column.

Online Price: $530.82
Regular Price: $619.29

McDonnell & Miller model number 150S-M is a combination float-operated low water cut-off and pump controller with maximum differential operation, which prevents nuisance burner shut-down in low pressure applications, for steam boilers with a separate water column.

Online Price: $530.82
Regular Price: $619.29

McDonnell & Miller model number 157S-M-MD is a combination float-operated low water cut-off and pump controller with maximum differential operation, which prevents nuisance burner shut-down in low pressure applications, for steam boilers with a separate water column.

Online Price: $691.13
Regular Price: $806.32

McDonnell & Miller model number 157S is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column.

Online Price: $691.13
Regular Price: $806.32

McDonnell & Miller model number 157S-AM is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column.

Online Price: $691.13
Regular Price: $806.32

McDonnell & Miller model number 157S-R is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column.

Online Price: $787.32
Regular Price: $918.54

McDonnell & Miller model number 157S-RM is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column.

Online Price: $783.76
Regular Price: $914.39

McDonnell & Miller model number 157S-RL is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column.

Online Price: $783.76
Regular Price: $914.39

McDonnell & Miller model number 157S-RL-M is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column and a manual reset.

Online Price: $783.76
Regular Price: $914.39

McDonnell & Miller model number 157S-M is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column.

Online Price: $691.13
Regular Price: $806.32

McDonnell & Miller model number 157S-MD is a combination float-operated low water cut-off and pump controller with maximum differential operation, which prevents nuisance burner shut-down in low pressure applications, for steam boilers with a water column.

Online Price: $691.13
Regular Price: $806.32

McDonnell & Miller model number 157SRBP-MD is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column.

Online Price: $1,289.63
Regular Price: $1,444.39

McDonnell & Miller model number 157S-A is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column.

Online Price: $691.13
Regular Price: $806.32

McDonnell & Miller model number 158S-M is a combination float-operated low water cut-off and pump controller for steam boilers with a separate water column and manual reset.

Online Price: $630.56
Regular Price: $735.65

McDonnell & Miller model number 158S is a combination float-operated low water cut-off and pump controller for steam boilers with a separate water column.

Online Price: $630.56
Regular Price: $735.65

McDonnell & Miller model number 159S is a combination float-operated low water cut-off and pump controller for steam boilers with a separate water column.

Online Price: $587.82
Regular Price: $685.79

McDonnell & Miller model number 193 is a combination float-operated low water cut-off and pump controller for steam boilers.

Online Price: $950.95
Regular Price: $1,141.14

McDonnell & Miller model number 193M is a combination float-operated low water cut-off and pump controller for steam boilers.

Online Price: $1,047.38
Regular Price: $1,173.06

McDonnell & Miller model number 193-7B is a combination float-operated low water cut-off and pump controller for steam boilers.

Online Price: $1,385.82
Regular Price: $1,552.12

McDonnell & Miller model number 193A is a combination float-operated low water cut-off and pump controller for steam boilers with water columns.

Online Price: $950.95
Regular Price: $1,141.14

McDonnell & Miller model number 193AM is a combination float-operated low water cut-off and pump controller for steam boilers with water columns.

Online Price: $1,047.38
Regular Price: $1,173.06

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