3/4" 571 Sweat Zone Valve Zoom
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3/4" 571 Sweat Zone Valve

SKU:571-2

Brand: Taco

Taco
Qty Price
$106.55
/ each
$413.40 / box (4 units x $103.35)
In Stock! Ships in 24-48 Hours
(327 Available)
5

Specs

Size: 3/4"
Flow Range (GPM): 4.5 to 6 GPM
Max Flow (GPM): 6
Min Flow (GPM): 4.5
Flow Capacity (Cv): 6.1 Cv
Width (Inches): 3-3/8"
Voltage:
?
24v
Connection Type: Sweat
End Switch: Yes
Body Pattern: 2-Way
Application: Zoning
Height: 4-13/16"
Material: Bronze
Amperage:
?
0.9
Voltage:
?
24v
Depth (Inches): 2"
Max Pressure (PSI): 125 psi
Wiring: 3 Wire Terminal Block
Body Pattern: 2-Way
Hertz: 60
Min Temp (F): 40°F
Temperature Range (F): 40°-240°F
Max Temp (F): 240°F
Connection Type: Sweat

Description for Taco 571-2


When you want the industry standard for hydronic heating applications, choose Taco's 570 Gold Series. Designers prefer these valves for their quiet and dependable operation. Installers appreciate the open lever and twist-off head that makes installation and service easy.

Available in 1/2" - 1 1/4" sweat connections.

Taco 570 Series FAQ Text

3/4" 571 Sweat Zone Valve

REVIEW SNAPSHOT®

by PowerReviews
Taco3/4" 571 Sweat Zone Valve
 
4.7

(based on 33 reviews)

Ratings Distribution

  • 5 Stars

     

    (27)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (2)

  • 1 Stars

     

    (0)

94%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

Reliable valuve

I have had these in our house for 30 years. I added a new bedroom and 2 baths and put in a new zone.

I have had these in our house for 30 years. I added a new bedroom and 2 baths and put in a new zone.

VS

Most Liked Negative Review

 

Seat fail in 3+ years

The seat assemblies start to leak after 3+ years. I believe that the copper bellows that keeps the piston watertight just starts to breakdown. Taco fails to redesign it. The assy. costs...Read complete review

The seat assemblies start to leak after 3+ years. I believe that the copper bellows that keeps the piston watertight just starts to breakdown. Taco fails to redesign it. The assy. costs as much as the valve, so if you get the whole valve and take out the seat assy., you must recycle all the brass on the outside. It's a poor and costly design and not worth the trouble for the long haul.

Reviewed by 33 customers

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5.0

They've worked for me

By Iron Mike

from Walpole MA

Verified Buyer

Comments about 3/4" 571 Sweat Zone Valve:

As part of a preventive maintenance project I used two of these to replace the two existing Taco zone valves, of the exact same type, that were installed thirty-one years ago. The bodies are rugged so if the power heads should ever need to be replaced (and I've done only one in those thirty one years) then it takes only about five minutes to twist it onto its retaining pegs and then to reconnect the three wires. Simple.

 
5.0

I will always buy this product

By Lal

from Wethersfield Ct

Verified Buyer

Comments about 3/4" 571 Sweat Zone Valve:

These valves are sturdy and simple to replace power head

 
5.0

Zone Valve

By Tony

from Sheboygan, WI

Verified Buyer

Comments about 3/4" 571 Sweat Zone Valve:

Very easy to use, wire and install. Does what it says. Thanks Pax and TACO

 
5.0

Great valve!!

By Joe da cook

from Branchburg, NJ

Verified Buyer

Comments about 3/4" 571 Sweat Zone Valve:

Had this same valve go bad (stuck shut), it was 30 years old. I ordered this from Pex and installed it and now back up and heat is running again. Got the best price for this zone valve because Pex did a price match and gave me an extra $5.00 off...Good for me!!

 
5.0

Great price, fast delivery

By Greg

from Markesan, WI

Verified Buyer

Comments about 3/4" 571 Sweat Zone Valve:

Product used on both hot and chilled water systems. Reliable valves and power heads. Have hundreds of them in the facility and only rarely replace the valves and the easy twist-off power heads occasionally.

 
5.0

What a deal

By amc1973

from Woodbridge, Virginia

Verified Buyer

Comments about 3/4" 571 Sweat Zone Valve:

Though I needed just the top part, I found the price so good I replaced the whole unit. When I told them that another seller had a few dollar less PexSupply matched the price. It has been working perfectly, so far!
Pex shipped quickly once I reminded them that it should have been shipped a day earlier as they had promised me at the time of the sale. Wonderful people to work with and I certainly would buy it again from them.

 
4.0

TACO Valve

By James

from Bend, OR

Verified Buyer

Comments about 1/2" 570 Sweat Zone Valve:

So far so good (i.e., works, no leaks). I installed 3 of these about a week ago for my radiant floor heating system. I figured that I would change the remaining 3 of 4 after the first one leaked and was replaced by a service and another one started leaking months later.

Because, I didn't want to unsolder the old valve to replace it, I removed the parts (spring, solenoid, control body) from the new valve and installed them in the body/shell of the original valve. Warning - it takes extensive force to compress the spring when re-installing the screws of the control section, so I recommend that a second person assist you.

Also, I received a price-difference refund when I saw a lower price for the same valve on a competitor's website the next day, even after I had placed the order!

 
4.0

Great Shopping and shipping

By Norm the plumber

from Santa fe NM

Verified Buyer

Comments about 3/4" 571 Sweat Zone Valve:

I use the valve in a heating system that is now 15 years old. This is a replacement for one of 6 valves. I am happy with the price and experience.

 
5.0

good price

By rocky

from Vermont

Verified Buyer

Comments about 3/4" 571 Sweat Zone Valve:

I searched for this item and found the price here to be the best. The zone vavle itself is very good. I replaced a different brand with this Taco. I have three other Taco zone valves that have been in operation for 30+ years and never had an issue with them.

 
5.0

Great product and a great price as well.

By Hambone

from Abbeville SC

Verified Buyer

Comments about 3/4" 571 Sweat Zone Valve:

This product we use on our water source heat pump and it works great and is very easy to install. We searched all the local stores and the price they charged was 3 times the price we paid for it through PEX. Also they were very prompt on the process and shipping of our order..

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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.

25 Questions | 44 Answers
Displaying questions 1-10Previous | Next »
  • 3/4" 571 Sweat Zone Valve

    Q:

    When power is off does it close
    Asked on 2/19/2014 by sharon from hamden,ct

    3 answers

    • VERIFIED BUYER

      A:

      I've used these Zone Valves for over 25 years at my house (I have 8 zones)
      and find them very dependable. Yes, if the power goes out, the zone valves
      will close. I have a generator for power outages, and have the circuit
      configured so it not only will power up the boiler, but ALSO power to the
      circuit for the transformers/thermostats/zone valves.
      Hope that helps!
      ~Steve C.
      Btw, be aware that if you force the zone valves on with the lever, you will
      risk damage to the zone valve coil when they are re-energized.
      Instructions say that if you use the manual override, then you should
      remove the low voltage wire that energizes them. Again, that isn't a
      problem for me because if power goes out, everything is out, including the
      circulator pumps, so nothing will happen using the manual control anyway.
      But when using generator to fire up the boiler, if you don't have a way to
      power the thermostats, then you would have to open the zones manually
      (assuming the boiler power also will fire up the circulator but not the
      zones).

      Answered on 2/20/2014 by Anonymous
    • VERIFIED BUYER

      A:

      My Answer is YES .

      Answered on 2/19/2014 by Anonymous
    • VERIFIED BUYER

      A:

      Yes.

      Answered on 2/19/2014 by Anonymous
  • 1-1/4" 573 Sweat Zone Valve

    Q:

    Will there be a problem using the 573 on the return line
    Asked on 2/13/2014 by tommy from leland, Nc

    6 answers

    • CUSTOMER CARE

      A:

      No, there wouldn't be. Installing zone valves on the return line is usually a good idea because it can reduce water-hammer noise.

      Answered on 2/17/2014 by PexSupply Staff from NY
    • VERIFIED BUYER

      A:

      Best on supply with the circulator on supply and pumping away from expansion tank. But what you are suggesting will work.

      Answered on 2/15/2014 by Anonymous
    • VERIFIED BUYER

      A:

      Tommy. I dont see any problem installing a zone valve on the return of a heating system. Sometimes valves are flow direction sensitive so I would make sure the flow is going the same way as the arrow on the side of the valve. Good Luck. Bryan GO HAWKS

      Answered on 2/14/2014 by Anonymous
    • VERIFIED BUYER

      A:

      I always install my zone valves on the return side of the boiler. The reason that I do it is because the temperature of the return water is a little cooler then the supply side. Also I noticed I have less problem with the valve when they were installed on the return side. Just be aware of the direction of the arrow on the valve, it must be towards the border if on the return side.
      Sent from my iPad

      Answered on 2/14/2014 by Anonymous
    • VERIFIED BUYER

      A:

      It is best practice to install zone valve on the supply line IMO. If it is
      the only place you can put it the location should not affect the resistance
      in the pipe.
      It is easier to purge the heating zone with the zone valve on the supply.
      If you put a zone valve on the return you should add a purge before and
      after the zone valve to insure that you do not have air in system.
      Ed K

      Answered on 2/14/2014 by Anonymous
    • VERIFIED BUYER

      A:

      I believe it should always be mounted on the return line
      Sent from my iPad

      Answered on 2/14/2014 by Anonymous
  • 3/4" 571 Sweat Zone Valve

    Q:

    My plans specify a 3/4" zone valve in the 3/4" copper distribution line, at the manifold. However, the flow rate is only 2.63 gpm and I see in the specs for the 3/4" 571 valve that minimum flow is 4 gpm. Will this valve work or did my designer miss something?
    Asked on 11/4/2013 by Skywagon211 from Whitefish, MT

    4 answers

    • VERIFIED BUYER

      A:

      You will be fine with this valve.  If you went to a smaller valve it would restrict your flow.  Better to have a valve that is a little larger than you need than one that is too small.
      Ray

      Answered on 11/5/2013 by Anonymous
    • VERIFIED BUYER

      A:

      Hello,
      Your setup should work. The zone valve simply opens or closes once it receives a signal from the thermostat, and opens to the 3/4 dia opening ie all the way open or all the way closed, not modulated.
      Your supply flow rate will go through regardless of the zone valve flow rate once the thermostat opens fully. If anything the zone valve rating may be a max flow rate not a min.

      Answered on 11/5/2013 by Anonymous
    • VERIFIED BUYER

      A:

      Valve will work just fine, If it was a non-electric valve you would run into
      problems because back pressure is needed to open valve. This 24 volt valve
      will open and its operation does not matter on back pressure.
      You pump is the most important factor. I like using 3-speed pumps because
      they cure a lot of design sins. If you are short on GPM then you can go to
      fasters speed. If zone is cycling too much you can go down to a slower
      speed.
      That my opinion
      Ed Kodzis
      M.A.I. Energy Contractors/Consultants

      Answered on 11/5/2013 by Anonymous
    • VERIFIED BUYER

      A:

      The zone valve simply opens and closes based on the electrical signal it
      receives. I don't know why it wouldn't work at a lower flow rate.

      Answered on 11/5/2013 by Anonymous
  • 3/4" 571 Sweat Zone Valve

    Q:

    I have the Taco 571-2 valve but it is not working, can i just replace the top part of the valve so I dont have to get a plumber to cut out and sweat the pipes. Thank you.
    Asked on 8/26/2012 by Joe new home owner from Somers, NY

    6 answers

    • VERIFIED BUYER

      A:

      Yes, the power head can be replaced without needing to replace the valve
      body. You can also replace valve parts without needing to re-sweat
      anything.
      If you need to replace any valve parts, you will have to turn off the water
      and drain the system. But for the power head alone, that doesn't even need
      to be done.
      Some basic info from Taco:
      http://www.taco-hvac.com/uploads/FileLibrary/100-3.2a.pdf

      Answered on 8/26/2012 by Anonymous
    • VERIFIED BUYER

      A:

      The answer is yes

      Answered on 8/26/2012 by Anonymous
    • VERIFIED BUYER

      A:

      You have to find out whats not working. Usually the valvprophets stuck and the actuator fails due to an overload. I'd recommend replacing the valve and actuator to resolve the problem right the first time.
      Robert Piszczek

      Answered on 8/26/2012 by Anonymous
    • VERIFIED BUYER

      A:

      YES YOU CAN

      Answered on 8/27/2012 by Anonymous
    • CUSTOMER CARE

      A:

      The power head for this zone valve is available as a separate replacement part. It is part number 555-050RP.

      Answered on 9/11/2012 by PexSupply Staff from NY
    • VERIFIED BUYER

      A:

      Hope this isn't too late, but yes you can just replace the actuator (top).
      It will most likely fix the problem. Hope this helps.

      Answered on 10/12/2012 by Anonymous
  • 3/4" 571 Sweat Zone Valve

    Q:

    I have three zones using the 571-8. Two zones work fine. The third zone has never work properly. Its the basement and while I can live without it there are times that I would like heat.

    The system is 22 years old. This value has been replaced many times so I not sure how old it is.

    Is there some way to operate this manually?
    Asked on 3/14/2012 by Anonymous from Cranston, RI

    5 answers

    • VERIFIED BUYER

      A:

      Pull down the lever on the zone valve to manually open the valve. The picture shows it in the closed position.

      Answered on 3/14/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      You can install a Taco 570 series valve and use the manual bypass lever to
      turn the zone on when needed. Not very elegant. You could also connect to
      a 24V supply + switch. You could then use the switch to turn zone on
      remotely. Better yet, install a local thermostat and use when you want
      heat. Turn thermostat off when you don't.

      Answered on 3/14/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      Move the lever next to the terminals from auto to manual. Make sure the circulator is running and see if the pipe heats up. If it doesn't heat up the zone valve may again be defective or the piping is clogged.
      This email and any files transmitted with it are confidential and intended solely fo rht recipient. If you are not the named addressee you should not disseminate, ditribute, copy or alter this email. Any view or opinions presented in this email are solely those of the author. Although resonable precautions have been taken to ensure no viruses are present in this email the sender cannot accept responsibility for any loss or damage arising from the use of this email or attachments.

      Answered on 3/15/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      Simply pull down on the lever will open the water flow & energize the electrical connection. To turn off just raise the lever
      Have a great day
      Joe Trevis 

      Answered on 3/15/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      Yes. The valve can be operated manually by pushing the manual lever forward. The lever sticks up on the right of the actuator (head) to the right of the electrical connection screws. Heat should flow. If it doesn't flow, try this: twist off the head by rotating it counterclockwise about 20 degrees. Take a screwdriver and push the valve open manually. It's spring-loaded, so push hard, and keep it open. Check for heat flowing through. If it isn't flowing, the base valve should be replaced. If the valve works, then it is your wiring or thermostat that's the problem.

      Answered on 4/23/2012 by dave at efi from Bainbridge Island, WA
  • 3/4" 571 Sweat Zone Valve

    Q:

    cAN THIS BE USED IN AN OPEN SYSTEM?
    Asked on 1/11/2012 by Anonymous

    1 answer

    • CUSTOMER CARE

      A:

      This valve is intended for use only in closed-loop systems. For an open system we'd recommend Taco's geothermal zone valve.

      Answered on 1/11/2012 by PexSupply Staff from NY
  • 1" 572 Sweat Zone Valve

    Q:

    Our Taco 562-5 zone valve does not open...wat do we do now?
    Asked on 12/30/2011 by Anonymous from Kendallville IN

    1 answer

    • CUSTOMER CARE

      A:

      You can open it manually for the time being, but you may need to replace the valve head.

      Answered on 1/6/2012 by PexSupply Staff from NY
  • 1" 572 Sweat Zone Valve

    Q:

    do you have a wiring schematic to zone panel?
    Asked on 12/12/2011 by Anonymous from Danville,Vt

    1 answer

    • A:

      If you go to http://www.taco-hvac.com/search.html and search you can easily find a library of helpful guides, including information for zone valve installation and wiring guides for many models, including the 1" 572 that you need.

      Answered on 1/12/2012 by Anonymous from None
  • 1-1/4" 573 Sweat Zone Valve

    Q:

    How long does the 1 1/4" valve take to cycle open?
    Thanx
    Bob
    Asked on 11/29/2011 by Anonymous

    1 answer

    • CUSTOMER CARE

      A:

      It takes 90 seconds to open completely.

      Answered on 11/30/2011 by PexSupply Staff from NY
  • 3/4" 571 Sweat Zone Valve

    Q:

    I have a three Taco 571-2 zone valves. Can I attach two different thermostats to one of the zone valves? I added another room to this zone (new addition) and would like the heat to come on when any of the rooms call for heat. I know the other room's heat will also come on. Will the addition of another thermostat cause conflicts on the controls if I attach the thermostat wires to the same screws on the zone valve as the other thermostat?

    Ray M
    Asked on 11/14/2011 by Ray from Easton, PA

    1 answer

    • CUSTOMER CARE

      A:

      No, each zone valve can only accommodate one thermostat.

      Answered on 11/14/2011 by PexSupply Staff from NY
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