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Home
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Hydronics
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Hydronic Controls
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Hydronic Zone Pump Relays
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Stocked Items
In Stock
Brands
Bell & Gossett (1)
Caleffi (5)
Honeywell (1)
Taco (12)
Tekmar (3)
Display Type
LED (5)
Voltage Rating
115 VAC (3)
120 VAC (8)
24 VAC (3)
Mounting Type
Wall (2)
Dimensions
4-3/4 in H x 2-7/8 in W x 1-7/8 in D (1)
11 in L x 3 in W x 9-1/4 in H (2)
10-11/16 in W x 2-3/8 in D x 8-3/16 in H (2)
2-7/8 in H x 4-3/4 in W (1)
4-5/8 in L x 2-5/8 in W x 5-3/8 in H (1)
13-1/2 in W x 8-1/4 in H x 3-1/4 in D (1)
6-3/4 in H x 10-1/4 in W x 2-3/4 in D (1)
4-15/16 in W x 2-7/16 in D x 6-11/16 in H (1)
Domestic/Import
Import (3)
Domestic (5)
Height
9-1/4 in (1)
Series
ZSR (4)
Sensor Type
1 Outdoor Air and 1 Supply Water (1)
1 Outdoor Air and 2 Supply Water (1)
Frequency Rating
60 Hz (3)
50/60 Hz (3)
Width
11 in (1)
5-1/8 in (1)
Type
Variable Speed (1)
Expandable (1)
4 Zone (1)
Three Zone (1)
Two Zone (1)
Six Zone (1)
Multi-Zone (1)
3 Zone (1)
Single Zone (2)
Four Zone (1)
Contact Form
DPDT (6)
Power Rating
1/3 hp (5)
24 V (1)
40 VA (1)
120 VAC (3)
24 VAC at 3VA (1)
Secondary Voltage
24 VAC (1)
Primary Voltage
120 VAC (1)
Amperage Rating
15 A (2)
20 A (6)
5 A (2)
Number of Zones
6 (1)
Enclosure Type
NEMA 1 (3)
Depth
3 in (1)
Coil Voltage
120 VAC (1)
Hydronic Zone Pump Relays
22
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Caleffi
3 Zone Pump Control 12 Va Trans
Part #
ZSR103
Display Type
LED
Voltage Rating
24 VAC
Dimensions
11 in L x 3 in W x 9-1/4 in H
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Caleffi
4 Zone Pump Control 12 Va Trans
Part #
ZSR104
Display Type
LED
Voltage Rating
24 VAC
Dimensions
11 in L x 3 in W x 9-1/4 in H
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Caleffi
6 Zone Pump Control 20 Va Trans
Part #
ZSR106
Voltage Rating
120 VAC
Height
9-1/4 in
Series
ZSR
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Caleffi
ExpansionTransformeFor3&4ZoneContr
Part #
NA10343
Type
Multi-Zone
Power Rating
40 VA
Secondary Voltage
24 VAC
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Honeywell
SINGLE ZONE SWITCHING RELAY
Part #
HPSR101
Width
5-1/8 in
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Caleffi
Single Zone Relay 12 Va Trans
Part #
ZSR101
Voltage Rating
24 VAC
Dimensions
4-5/8 in L x 2-5/8 in W x 5-3/8 in H
Series
ZSR
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Taco
Taco Boiler Reset Control
Part #
PC700
Mounting Type
Wall
Dimensions
2-7/8 in H x 4-3/4 in W
Sensor Type
1 Outdoor Air and 1 Supply Water
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Taco
Taco Cir Xfmr Relay 2 Zone W/priority
Part #
SR502
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Two Zone
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Taco
Taco Injct Mix Contl Variable Speed Pump
Part #
PC705
Mounting Type
Wall
Dimensions
4-3/4 in H x 2-7/8 in W x 1-7/8 in D
Sensor Type
1 Outdoor Air and 2 Supply Water
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Taco
Taco Repl Fuse 5 Amp
Part #
SR5A-005RP
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Taco
Taco Repl Fuse 6 Amp
Part #
SR6A-001RP
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Taco
Taco Repl Relay 24v
Part #
SR024-001RP
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Taco
Taco Switch Relay 3 Zone W/priority
Part #
SR503
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Three Zone
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Taco
Taco Switch Relay 3 Zone W/priority 3p
Part #
SR503EXP
Voltage Rating
120 VAC
Dimensions
6-3/4 in H x 10-1/4 in W x 2-3/4 in D
Type
Expandable
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Taco
Taco Switch Relay 4 Zone W/priority
Part #
SR504
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Four Zone
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Taco
Taco Switch Relay 4 Zone W/priority 3p
Part #
SR504EXP
MFG #
SR504-EXP
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Taco
Taco Switch Relay 6 Zone W/priority
Part #
SR506
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Six Zone
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Taco
Taco Switching Pump-Relay 1 Zone
Part #
SR501
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Single Zone
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Tekmar
Tekmar Switching Relay 1 Zone
Part #
301P
Display Type
LED
Voltage Rating
115 VAC
Dimensions
4-15/16 in W x 2-7/16 in D x 6-11/16 in H
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Tekmar
Tekmar Switching Relay 4 Zone w/priority
Part #
304P
Display Type
LED
Voltage Rating
115 VAC
Dimensions
10-11/16 in W x 2-3/8 in D x 8-3/16 in H
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Tekmar
Tekmar Switching Relay 6 Zones w/Priorit
Part #
306P
Display Type
LED
Voltage Rating
115 VAC
Dimensions
10-11/16 in W x 2-3/8 in D x 8-3/16 in H
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Bell & Gossett
Zonetrol Z4 Zone Pmp Control 109427
Part #
Z-4
Voltage Rating
120 VAC
Dimensions
13-1/2 in W x 8-1/4 in H x 3-1/4 in D
Amperage Rating
20 A
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Caleffi
3 Zone Pump Control 12 Va Trans
Part #
ZSR103
Display Type
LED
Voltage Rating
24 VAC
Dimensions
11 in L x 3 in W x 9-1/4 in H
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Caleffi
4 Zone Pump Control 12 Va Trans
Part #
ZSR104
Display Type
LED
Voltage Rating
24 VAC
Dimensions
11 in L x 3 in W x 9-1/4 in H
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Caleffi
6 Zone Pump Control 20 Va Trans
Part #
ZSR106
Voltage Rating
120 VAC
Height
9-1/4 in
Series
ZSR
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Caleffi
ExpansionTransformeFor3&4ZoneContr
Part #
NA10343
Type
Multi-Zone
Power Rating
40 VA
Secondary Voltage
24 VAC
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Honeywell
SINGLE ZONE SWITCHING RELAY
Part #
HPSR101
Width
5-1/8 in
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Caleffi
Single Zone Relay 12 Va Trans
Part #
ZSR101
Voltage Rating
24 VAC
Dimensions
4-5/8 in L x 2-5/8 in W x 5-3/8 in H
Series
ZSR
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Taco
Taco Boiler Reset Control
Part #
PC700
Mounting Type
Wall
Dimensions
2-7/8 in H x 4-3/4 in W
Sensor Type
1 Outdoor Air and 1 Supply Water
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Taco
Taco Cir Xfmr Relay 2 Zone W/priority
Part #
SR502
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Two Zone
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Taco
Taco Injct Mix Contl Variable Speed Pump
Part #
PC705
Mounting Type
Wall
Dimensions
4-3/4 in H x 2-7/8 in W x 1-7/8 in D
Sensor Type
1 Outdoor Air and 2 Supply Water
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Taco
Taco Repl Fuse 5 Amp
Part #
SR5A-005RP
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Taco
Taco Repl Fuse 6 Amp
Part #
SR6A-001RP
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Taco
Taco Repl Relay 24v
Part #
SR024-001RP
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Taco
Taco Switch Relay 3 Zone W/priority
Part #
SR503
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Three Zone
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Taco
Taco Switch Relay 3 Zone W/priority 3p
Part #
SR503EXP
Voltage Rating
120 VAC
Dimensions
6-3/4 in H x 10-1/4 in W x 2-3/4 in D
Type
Expandable
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Taco
Taco Switch Relay 4 Zone W/priority
Part #
SR504
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Four Zone
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Taco
Taco Switch Relay 4 Zone W/priority 3p
Part #
SR504EXP
MFG #
SR504-EXP
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Taco
Taco Switch Relay 6 Zone W/priority
Part #
SR506
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Six Zone
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Taco
Taco Switching Pump-Relay 1 Zone
Part #
SR501
Voltage Rating
120 VAC
Domestic/Import
Domestic
Type
Single Zone
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Tekmar
Tekmar Switching Relay 1 Zone
Part #
301P
Display Type
LED
Voltage Rating
115 VAC
Dimensions
4-15/16 in W x 2-7/16 in D x 6-11/16 in H
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Tekmar
Tekmar Switching Relay 4 Zone w/priority
Part #
304P
Display Type
LED
Voltage Rating
115 VAC
Dimensions
10-11/16 in W x 2-3/8 in D x 8-3/16 in H
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Tekmar
Tekmar Switching Relay 6 Zones w/Priorit
Part #
306P
Display Type
LED
Voltage Rating
115 VAC
Dimensions
10-11/16 in W x 2-3/8 in D x 8-3/16 in H
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Bell & Gossett
Zonetrol Z4 Zone Pmp Control 109427
Part #
Z-4
Voltage Rating
120 VAC
Dimensions
13-1/2 in W x 8-1/4 in H x 3-1/4 in D
Amperage Rating
20 A
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