1-1/4" Sweat Motorized Zone Valve, w/ auxiliary switch Zoom

1-1/4" Sweat Motorized Zone Valve, w/ auxiliary switch


Brand: Honeywell-Sparco

Qty Price
/ each
In Stock! Ships in 24-48 Hours
(5 Available)



Application: Zoning
Size: 1-1/4"
Connection Type: Sweat
Flow Capacity (Cv): 7
Body Pattern: 2-Way
Max Close-Off PSI: 17.5 psi
Max Pressure (PSI): 125 psi
Max Ambient Temp (°F): 125°F
Auxiliary Switch: SPST
End Switch: Yes
Hertz: 60
Time Cycle: 10-20 Seconds Open
3-6 Seconds Close
Position: Normally Closed
Wiring: 18" Leads
Material: Bronze
Max Temp (F): 240°F
Width (Inches): 3.8"
Depth (Inches): 2.4"
Height (Inches): 5.8

Description for Honeywell-Sparco MZV527E

*** Note: This item comes as a 1" valve with adapters to make it 1-1/4" ***

Honeywell MZV Series is the first linear zone valve with a built-in balancing plug that permits pre-balancing for each zone.


  • Rack and pinion linear design.
  • Fast acting, 15 seconds to open, 5 seconds to close.
  • Two piece rack design to extend service life.
  • Low power consumption, 8 valves, 40 VA transformer.
  • External valve position indicator.
  • Quiet operation, no water hammer.
  • Built-in tamper resistant balancing valve for pre-balancing.
  • High torque, constant speed synchronous motor.
  • Cooler running, longer life motor.
  • Operator can be replaced without draining system.
  • Manual opening feature.
  • Replaceable valve cartridge.
  • Large adjustable flow, 1/2 in. 3/4 in. Cv 5.8; 1 in. 7.0 Cv; 1-1/4 in. Cv 7.0.
  • Motor CSA recognized.
  • 4 wire operator with auxiliary switch.
  • 2 wire without switch, 24 in. leads.
  • Compatible with programmable thermostats.
  • Bronze casting; brass/stainless trim

  • Application: Residential or Commercial Zoning for hot water heating or chilled water air conditioning systems, fan coil units or indirect water heater service.
  • Body Pattern: Two-way
  • Maximum Close-off Pressure (psi): 17.5 Psi
  • Maximum Water Pressure (psi): 125 Psi
  • Maximum Ambient Temperature (F): 125F
  • Voltage: 24 Vac
  • Frequency: 60 Hz

1-1/4" Sweat Motorized Zone Valve, w/ auxiliary switch


by PowerReviews
Honeywell-Sparco1-1/4" Sweat Motorized Zone Valve, w/ auxiliary switch

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

Sort by

Displaying reviews 1-2

Back to top


HoneywellMZV zone valve

By Dick

from Mankato, MN.

Verified Buyer



      Best Uses

        Comments about 3/4" Sweat Motorized Zone Valve, w/ auxiliary switch:

        This valve is extremely reliable and requires on a .25 AMP draw. I have two one is 15 Years old with no problems.

        • Primary use:
        • Personal

        Works as intended

        By Liberty

        from NH

        Verified Buyer



            Best Uses

              Comments about 1-1/4" Sweat Motorized Zone Valve, w/ auxiliary switch:

              Honeywell does not make this valve in a true 1 1/4" sweat. They provide increasers to make it 1 1/4". The valve is 1" sweat. When I ordered the valve Pex supply did not state this in their listing of the product. I had a clearance issue so it would not work. Four phone calls later and Pex supply made it right. Thank you

              • Primary use:
              • Personal

              Displaying reviews 1-2

              Back to top

              Q&A: Ask the Questions, share answers

              Do you have questions about this product?

              Get answers from real customers and in-house experts with AnswerBox.

              1 Question | 3 Answers
              Displaying question 1
              • 1-1/4" Sweat Motorized Zone Valve, w/ auxiliary switch


                wiring valve? I have 2 red & 2 yellow wires coming out of valve head . There is no wiring instructions. it is a 24 v.-0.7a head part number 500-1 rp. it is a sparco which i know now is honeywell.
                Asked on 8/8/2012 by jim

                3 answers

                • VERIFIED BUYER


                  You need a cheap voltmeter.
                  Two of the wires run the motor which opens the valve. The other two go
                  to a switch that closes when the valve is completely closed. Normally
                  the thermostat circuit applies 28vac to the motor as long as the valve
                  is to be held open, and all the switches on all the valves in the system
                  are wired in parallel to turn on the boiler relay.
                  My units have much smaller wires for the switch, and they are red. If
                  you test them with an ohm meter they will test open since the valve is
                  closed. If you test the motor wires they will show some resistance, I'm
                  guessing maybe a hundred ohms or so. Hope this helps.

                  Answered on 8/9/2012 by Anonymous
                • VERIFIED BUYER


                  Jim- On my older Sparco, yellow/orange were for power 22-28 volt AC, the two
                  red are for an internal limit switch used for boiler control (i.e. boiler
                  won't fire unless valve is open). Use a meter to check for an open on the
                  red wires with a closed valve. You can also manually open this valve which
                  should make continuity between the red leads.

                  Answered on 8/10/2012 by Anonymous
                • CUSTOMER CARE


                  Please see pages 3 & 4 of the following for diagrams: http://s3.pexsupply.com/manuals/1258494532382/19598_PROD_FILE.pdf

                  Answered on 8/22/2012 by PexSupply Staff from NY
              Displaying question 1

              Do you have a question about this product?