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Questions and Answers for Taco Comfort Solutions Power Head

Internet #202270182

Model #555-050RP

Store SKU #748474

  • Functions in conjunction with the thermostat, room temperature
  • Requires 24-volt power input
  • Operational pressure capacity: 250 PSI

Questions & Answers

21Questions
caret
Q:Will this work with 578?
by|Oct 24, 2023
1 Answer
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A:  Taco doesn’t make nor has it made a Zone valve with the model number 578. Which leads me to wonder what you have. Is it possible you have a 573, which is a zone valve with 11/4” copper sweat connections? If so, this power head would be appropriate. In case not let me also say that if your zone valve has a gold power head this power head would be appropriate. If it has green color head than possibly, and lastly if it has an orange-colored head than no it will not work. The orange power heads are designed to go on valves used on geothermal systems. They operate at much higher pressures and require powerheads with much stronger heat motors. Chris 978 651 3301

by|Oct 24, 2023
    caret
    Q:Are these easy to install
    by|Mar 3, 2023
    2 Answers
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    A:  couldn't be easier. note where the colored wires are first. turn off power to the heads. twist the powerhead counterclockwise to take off. Put the new one on. connect the wires to the screws. Turn on power to the heads. Done

    by|Sep 23, 2023

      A:  Hello, Thank you for your recent inquiry with The Home Depot. We offer professional services through Home Depot vetted third party companies. To get information on services offered in your area, please visit proreferral.com or (855) 752-3352 and the company selected should reach out to you and provide pricing and scheduling information. We appreciate your business and look forward to serving you in the future. -The Home Depot-

      by|Mar 17, 2023
        caret
        Q:HOW MENY TICO 555 VALVES CAN ON A 40 VA TRANSFOMER
        by|Jan 19, 2023
        1 Answer
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        A:  You will find different plumbers may give you different opinions. I have been in the plumbing industry for 50 years, for what it is worth. I and most of plumbers I know have always worked under the following rule of thumb. The max is one circulation pump and one forty VA transformer, to three Taco heat motor zone valves. Not to many years ago I went to see my brother’s new home. I pointed out to him that he had seven taco heat motor zone valves being fed by one pump and one transformer. He observed the system was sluggish and non-responsive but worked. Eventually we re-piped the system so that each zone had its own pump which greatly reduced reaction time. There are two problems created by having too many zone valves. First if all the zones try to open at the same time the draw on the transformer needed to actuate the heat motors could exceed the volt amperage of the transformer. This could cause it to burn out. Second, water in hydronic heating system moves along the path of least resistance. By have multiple zones on one pump the flow rates in each zone are going to vary depending on how many and which zones are open. Because zone valves and circulators have been roughly the same price for decades now, zone valves are used much less often. Most plumbers now design systems where each zone has its own circulator.

        by|Jan 19, 2023
          caret
          Q:WHAT THERMOSTAT WORKS WITH TACO ZONE VALVE
          by|Dec 27, 2022
          1 Answer
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          A:  You don’t need a special thermostat. Any low voltage thermostat can be used. A thermostat is an unpowered switch that opens and closes based on temperature. The thermostat and zone valve are powered by the 24 volt transformer that is installed separately. These items for a system. It is the voltage that from the transformer that actuates the heat motor in the zone valve. Chris 978 651 3301

          by|Dec 27, 2022
            caret
            Q:Need the base for the power head its a Taco 571
            by|Nov 29, 2022
            1 Answer
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            A:  A Taco 570 series zone valve has two parts. The heat motor which is also called a power head. It is the gold cage unit on the top. The other part is the valve body that sits beneath it. Taco offers complete zone valves; meaning valve and power head together. And they offer replacement power heads. They do not offer valve bodies without power heads as a product. I could contact them and find out if they offer it as a part. But in my experience if they do offer it as a part it will be more expensive than a complete zone valve. Chris 978 651 3301.

            by|Nov 29, 2022
              caret
              Q:I have 3 zones all have Taco 555-102 (green colored) power heads. One seems to have failed. I get a hint of electrical burnout from it but not the other. Does this model really replace all those others?
              by|Feb 1, 2022
              2 Answers
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              A:  I purchased this replacement head for my TACO 555 102. It worked perfectly. The only difference between my pre-existing valve head and the new one is that the original had flat screws and the new one has phillips - works perfectly! Exact replacement!

              by|Mar 6, 2024
                1 found this answer helpful

                A:  I am updating my answer as a Taco just called me back. More specifically a retired Taco engineer I knew as a kid. 555-102 is not the model number or part number of the power head. As he remembers it, that was the part number for the sticker they put onto the heat motor power head. So we really don't know by that what zone valve you have. My original answer is as follows. Wow as someone who has done this for a long time, this is the type of question that I enjoy. If you pull down the bypass arm there will be a date code stamped in the arm. I think you will find that this heat motor power head is a minimum of 40 years old. So they have done you right. The problem is the Taco product line has changed a lot since then, so a definitive answer to your question requires a little more info than you have provided. Allow me to explain. If this is a typical two way zone valve on a hydronic heating system, meaning boiler and baseboard or radiators, you should be fine with this as a replacement. However if it is a three way zone valve or a zone valve used on a geothermal or other more exotic system possibly not. There you might need something different. To give you a definitive answer I would need more information about the application or the modal number of the complete valve rather than the part number of the power head. Unfortunately it is so old i don't know where on the valve to tell you to look. But i can tell you it will be a number like "571". While you are doing this I would also recommend you take volt and amperage meter and confirm your transformer is supplying you with 24 volts and roughly 40VA. If a power head this old goes bad, it can certainly be that it just expired, but it can also indicate that the transformer is no longer producing the correct power supply. So the failure of the power head could be the result of a separate problem and thus a result of a problem that lies elsewhere. Feel free to give me a call chris 978 651 3301

                by|Mar 10, 2022
                  1 found this answer helpful
                  caret
                  Q:I replaced my zone valve (Taco model 555-050RP) just one year ago and it failed. Upon close inspection, the bead which makes contact and slides on the cone is missing. Is there a replacement warranty?
                  by|Jan 19, 2022
                  2 Answers
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                  A:  I purchased the same Taco powerhead in October 2020 & it failed within the next 12 months. The motor evidently failed as it was producing a electronic burning smell. These powerheads are evidently manufactured to fail so that you have to replace them. It is my understanding that there is a one year warranty. I would first pursue the matter with the vendor purchased from (proof of purchase/payment receipt with date purchased). Otherwise contact customer relations directly at Taco Company in Cranston, RI.

                  by|Mar 26, 2022
                    2 found this answer helpful

                    A:  Sorry for you inconvenience. The warranty on power heads is three years. If you pull down the bi-pass arm next to the three wiring screws, there will be a series of numbers stamped in the side. It is a date code; month and year. In case the date code does not correspond to your memory let me point out that a six month shelf item is built into the date code. So a power head made today would be stamped with a birth date six months from today. Six months is the average time between manufacture and installation. I am sorry but I really don't follow you point about "the bead that makes contact" so I can't comment. But I can say that heat motor valves have proved much more dependable than solenoid valves which is why they are preferred. You should be getting 15 to 20 years of life. When they consistently fail prematurely the cause is typically inadequate power supply. Zone valves require that the system have a dedicated 24 volt 50 volt amp transformer. The rule is one transformer for every three zone valves. As a plumber it has been my experience that when more than three zones valves are tied to one transformer they overload and damage the transformer and the power heads. You may want to check the transformer to makes sure it is producing the correct voltage and amperage as if the transformer is weak that will also damage the heat motor. Taco does not handle warranties directly. You should go through the place where you purchased the power head originally to get a warranty replacement.

                    by|Jan 19, 2022
                      caret
                      Q:WHAT CAUSES THE TACO POWER VALVE ZONE HEADS TO FAIL EVERY 2 YEARS? I have 2 Zones. The lower zone level keeps failing every 2 years. THIS IS THE 3RD ON IN 6 YEARS?!! SEEMS TO BE POOR QUALITY. ANY SUGGESTIONS? HAD THEM INSTALLED BY CONTRACTORS.
                      by|Dec 10, 2021
                      1 Answer
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                      A:  Great question and sorry for the delay as I have been out sick. You are welcome to give me a call if you have further questions. These are called heat motor valves. Inside the top cage unit is a canister that when heated expands and opens the valve. This makes them slow opening and slow closing, perfect for application. You typically get 20 plus years out of these and I have changed out ones that are much older. Premature failure typically indicates bad voltage. To be specific not enough amperage. Relays and aqua stats will contain 24 volt transformers to power the thermostat control circuit. But they lack the volt amperage to effectively power zone valves. To provide sufficient power an external 24 volt transformer is installed. They typically rule is 3 zone valves per circulation pump and one external transformer for every three zone valves. Having the proper volt amperage is critical to running the low voltage control strategy system. If you exceed the volt amperage of the circuit or if it is insufficient to start the transformer can be become damaged and start feeding bad current to the zone valves which will damage them. So although the symptom of the problem is the premature failure in the zone valves or power heads, experience tells me that is derivative of the real problem which is in your power supply. So I would check the transformer. If you find it or they are fine I would move to the thermostat. They are not what they use to be. The thermostat, which is basically a switch, needs to close deliberately and tightly. If it is chattering on and off, as it closes, it would be like turning a light bulb off and on real fast. In short order the light bulb will burn it out. As will the zone valve. I am not aware of a bad run of zone valves. So I feel confident that you have a problem somewhere but it is most likely not in the zone valves. Chris 978 651 3301

                      by|Mar 10, 2022
                        1 found this answer helpful

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