1" Zone Sentry Valve, Normally Open (Sweat) Zoom

1" Zone Sentry Valve, Normally Open (Sweat)


Brand: Taco

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Application: Zoning
Size: 1"
Connection Type: Sweat
Position: Normally Open
Flow Capacity (Cv): 8.9
Min Temp (F): 20°F
Temperature Range (F): 20°-240°F
Max Temp (F): 240°F
Material: Forged Bronze
Max Close-Off PSI: 125 psi
Max Pressure (PSI): 300
Width: 3-1/8"
Depth (Inches): 2-3/8"
Height: 3-11/16"
Wiring: 18" Leads
Plug-In 4 Wire Screw Terminals
Hertz: 60
Body Pattern: 2-Way
End Switch: Yes

Description for Taco V100C2A2ZB024Q4A1

NOTE: Image may not depict actual product

Taco Zone Sentry Zone Valves provide on-off, normally open or normally closed control in both open and closed hot or chilled water systems. The valves can be used in a wide variety of heating and cooling applications, primarily designed for use with fan coils, radiators, convectors, air handlers, heat pumps and radiant applications.

The Zone Sentry is the most technologically advanced zone valve ever made. It's also simple to install and operate. The valve can be installed in any direction, in any orientation. Taco then went a step further, allowing the operator to be mounted to the valve body in either direction (see Figure A of the manual in the "Manuals" tab), great for those tight baseboard jobs. Snap-in quick connects on the back of the valve make for a simple, secure and fast wiring hook-up. A green LED light shows full functionality of the valve's operation and thermostat status. Under a no power situation the manual override button located on the top of the valve allows the ball to be rotated up to 90° and is also marked with a slot to indicate the position of the valve.

1" Zone Sentry Valve, Normally Open (Sweat)


by PowerReviews
Taco1" Zone Sentry Valve, Normally Open (Sweat)

(based on 3 reviews)

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Reviewed by 3 customers

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Flow size is less than 1/2 inch.

By Ed

from Greenwich, CT

Verified Buyer

Comments about 1" Zone Sentry Valve, Normally Open (Sweat):

Pipe size is NOT the size of the internal ball valve which is just under a half inch diameter. If you are looking for a one inch flow, this is NOT for you. You could get a smaller valve at less cost and use an adapter to the pipe size and get the same result.


great price for a great product

By woody

from Bellefonte ,pa

Verified Buyer

Comments about 3/4" Zone Sentry Valve, Normally Open (Sweat):

So far all of Taco products work perfectly together and make my work look more professional .


It really IS new and improved!

By Randy

from Portland, OR

Verified Buyer

Comments about 1" Zone Sentry Valve, Normally Open (Sweat):

I have used the older versions of these before and they were pretty good. Reliable and functional and about what you expect them to be. These new ones are all that and a bit more. For one, they look better (not the picture shown above, but the Sentry style) with the actuator having a rounded, low profile motor. I think they are actually a little bit bigger than before, but they LOOK smaller. The actuator comes on and off easier than before with a clever latching spring. Best thing of all, the old units were pretty loud with a very noticible motor sound when operating. These new ones are almost inaudible, not as quiet as a thermal, but way quieter than a cell phone on vibrate.

My only gripe is that the very first version of these (the first "ESP's" before they had to change the names) were field configurable as either normally open or normally closed. It would be great if these were too.

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2 Questions | 3 Answers
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  • 3/4" Zone Sentry Valve, Normally Open (Sweat)


    I have the older 3/4" EBV Zone Valves, that have seemed to fail. Can I use the new EBV Zone Valve motor and control portion on top of the older Taco copper valve? Will it just twist on? Thanks...
    Asked on 2/16/2012 by Dave

    2 answers



      The newer-style Zone Sentry heads are also compatible with existing EBV and ESP valves. These heads are available by themselves: part ZA024Q4A1 (normally closed) and part ZB024Q4A1 (normally open).

      Answered on 2/17/2012 by PexSupply Staff from NY
    • A:

      yes they will. the older Taco EBV zone valves bodies were not copper as you state but cast brass, just want to make sure we're talking about the same item . Twist off the old and twist on the new , that simple,that's what makes them great!

      Answered on 10/15/2012 by Bazy from Union , NEW ,JERSEY
  • 1" Zone Sentry Valve, Normally Open (Sweat)


    I have a Closed system with 11 zones. I am using a 180,000 btu raypak boiler that heats a open water heater for domestic hot water 80 gal. I also have a Heat exchanger that I intend to use should I go with 11 Taco pumps 1 for each zone or build headers and 1 Pump with 11 Taco Zone valves?
    Asked on 1/5/2012 by Pete M from Wildomar CA

    1 answer



      This is primarily a matter of preference. Zone valves use less electricity, but if you zone by pump your entire system would not be dependent on one large circulator.

      Answered on 1/31/2012 by PexSupply Staff from NY
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