Power Unit for 5101-G2 Zoom

Power Unit for 5101-G2

SKU:555-173RP

Brand: Taco

Taco
Qty Price
$79.95
/ each
$227.85 / box (3 units x $75.95)
In Stock! Ships in 24-48 Hours
(138 Available)
0

Resources

Specs

Application: Replacement Part
Accessory For: 556-G2 Zone Valve
557-G2 Zone Valve
5101-G2 Zone Valve

Description for Taco 555-173RP

Power Unit for 5101-G2

Power Unit for 5101-G2

REVIEW SNAPSHOT®

by PowerReviews
TacoPower Unit for 5101-G2
 
3.4

(based on 26 reviews)

Ratings Distribution

  • 5 Stars

     

    (8)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (5)

  • 2 Stars

     

    (9)

  • 1 Stars

     

    (0)

60%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

Great Little Actuator

I have this unit on my Geo Thermal Unit. It works great. I run my unit on well water (open loop) and heat and cool year round. These units last about...Read complete review

I have this unit on my Geo Thermal Unit. It works great. I run my unit on well water (open loop) and heat and cool year round. These units last about 8-10 years in the Attic were ambient temperatures vary from -10F to 150F.

VS

Most Liked Negative Review

 

Power Unit for Taco 5101-G2 Valve

First the good: When the unit goes bad, you can twist it off and twist on the replacement, then hook up the wires and you're back in business
The bad: The power...Read complete review

First the good: When the unit goes bad, you can twist it off and twist on the replacement, then hook up the wires and you're back in business
The bad: The power unit appears to have about a 3-4 year life expectancy. The heater wires in the head are poorly connected to the power feed and the connections eventually fail.

With that in mind, if you have a Taco 5101-G2 valve, buy an extra powerhead to keep on the shelf for when the one in service goes bad. It will be less costly to replace it yourself than paying a technician $250 or more for a service call.

Reviewed by 26 customers

Displaying reviews 1-10

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2.0

Disappointing product

By Tech

from Silver Lake, IN

Comments about Power Unit for 5101-G2:

This zone valve is used in my geothermal system to prevent water hammer when the system shuts down. It opens and closes gradually to prevent the hammer and locks out the compressor until water is flowing. My issue with this valve is that it fails yearly. I have to agree with most of the other posts that this is not a reliable component.

 
2.0

Poor design

By JAS

from Indiana

Verified Buyer

Comments about Power Unit for 5101-G2:

This valve is the achilles heal of my furnace. I bought three just in case. Sure enough the first one only lasted three days. The second one has been working fine for about three weeks.

 
3.0

Okay, but doesn't last very long....

By Ken

from Western NC

Verified Buyer

Comments about Power Unit for 5101-G2:

The unit has to be replaced about every year in my system. The power unit may have been replaced with a 5101-G3 power unit, I am told by Customer Service. It is replaced with the improved version when one orders the whole valve. Don't know about ordering a single Electronic power unit. I could not find any information in that regard. Since I have to have one fairly often, I simply ordered a replacement power unit. Hopefully they sent me the improved version.

 
3.0

Performs great until it does'nt.

By Camper Bob

from Enemy Swim Lake, SD

Verified Buyer

Comments about Power Unit for 5101-G2:

It is used for my geothermal heating system. When the system calls for heat it opens and allows water to flow which allows the heat pump to start. When calibrated temperature is reached it turns off. This is the third one I've replaced in eight years which I think is too high of a failure rate. I'll have to keep an extra one on hand. I live in the country and found out that the nearest one I could find was 150 miles away. I was happy that supply house.com could provide one but I was still without the use of my heat pump for 6 days.

 
5.0

Power Unit

By Aviator01

from Mt. Vernon, WA

Verified Buyer

Comments about Power Unit for 5101-G2:

I needed to replace a power unit on the water valve for the ground source heat pump.

 
4.0

Must have for us.

By Jerry

from Wichita, KS

Verified Buyer

Comments about Power Unit for 5101-G2:

We use this valve for our water Geo-Thermal heating and air system. We have to replace it about every 4 or 5 years because we have such hard water.

(1 of 1 customers found this review helpful)

 
2.0

12 month lifespan.

By frustrated

from Boise, idaho

Verified Buyer

Comments about Power Unit for 5101-G2:

designed to fail, lucky to get one years service.
unfortunately no alternative for my existing system.

(2 of 2 customers found this review helpful)

 
3.0

Power Unit for Taco 5101-G2 Valve

By Bob the Builder

from Maine

Verified Buyer

Comments about Power Unit for 5101-G2:

First the good: When the unit goes bad, you can twist it off and twist on the replacement, then hook up the wires and you're back in business
The bad: The power unit appears to have about a 3-4 year life expectancy. The heater wires in the head are poorly connected to the power feed and the connections eventually fail.

With that in mind, if you have a Taco 5101-G2 valve, buy an extra powerhead to keep on the shelf for when the one in service goes bad. It will be less costly to replace it yourself than paying a technician $250 or more for a service call.

 
5.0

taco power head

By JD

from north carolina

Verified Buyer

Comments about Power Unit for 5101-G2:

Great to have heat again. Part works great

 
3.0

Looks great but only works for awhile.

By Ron in maintenance.

from Cody, Wyoming

Verified Buyer

Comments about Power Unit for 5101-G2:

I use this valve on an open system heat pump. It works great for the first 12 to 18 months then the end switch quits working. Either the end switch contacts go bad or the power mechanism starts getting weak with age. The end switch circuit drops out the compressor circuit and the fan keeps running which cancels out most of the benefit of the heat pump. After the compressor circuit times out the compressor restarts again until either the thermostat is satisfied or the end switch malfunctions again. Very aggravating. I use a single pole switch in parallel with the end switch and manually do the end switches job until I reorder and replace another Power Unit. I'm now on my fourth Power Unit.

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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.

2 Questions | 10 Answers
Displaying questions 1-2
  • Power Unit for 5101-G2

    Q:

    What is the warranty time frame for this valve? I too have had multiple failures of this valve. My current application has this valve mounted horizontally on vertical pipe and I have replaced 3 valves in the last 2 years.
    Asked on 3/14/2012 by Anonymous from Huntertown, IN

    6 answers

    • A:

      I suspect the valve should be mounted vertical.I used one maybe 15 years mounted vertical,just installed one horizontal and had problem in two months.Hitting the valve caused it to allow compressor start.Have turned valve to vertical position and put a few drops of oil on plunger.Time will tell.

      Answered on 5/29/2015 by Fisherman from Tampa Fl
    • VERIFIED BUYER

      A:

      I've had this valve for over 2 years with no problems. However, it is mounted vertically. I'm wondering if your horizontal mount is contributing to the problem?

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

      A:

      Don't know if it has any sort of warranty ... I would suggest the valve
      be mounted on a horizontal pipe run with the power head on top so that
      any possible leakage from the valve has less potential to allow
      moisture to get to the power head.

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

      A:

      I can , It looks familiar.
      Mine are mounted horizontally. I don't think it makes a difference. Mine are
      on three water source heat pumps. I have never asked about a warranty.
      I usually can get two years out of the solenoid part of the valve. The brass
      valve itself last a lot longer.

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

      A:

      I am not sure on the warranty on this product. I have two of these
      installed in my house (also horizontally on vertical pipes) and have
      replaced only one of them once in the 9+ years I have had them in
      service. I do keep an extra on hand though just in case.

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

      A:

      This is only the second failure I have had. I do not know what caused
      it. In fact, I am not really sure that the valve I replaced is bad as I
      have the feeling my system is not sending the proper signals to it.
      Overall, I have had good luck with it. Make sure you are getting the
      proper voltage and also make sure that the valve itself moves freely and
      is not mucked up with calcium or iron. Tony

      Answered on 3/14/2012 by Another PexSupply Customer
  • Power Unit for 5101-G2

    Q:

    Hi! What is the difference between this power unit and the Zone Valve Power Head (Series 570)? I am having a high failure rate with this power head and am looking for alternatives.
    Asked on 3/7/2012 by Anonymous from Boise, ID

    4 answers

    • CUSTOMER CARE

      A:

      This is the power head for Taco's geothermal/open system zone valves. Unfortunately, heads for different series cannot be used interchangeably.

      Answered on 3/7/2012 by PexSupply Staff from NY
    • VERIFIED BUYER

      A:

      It depends on what is causing the failures, mechanical or electrical. In any
      case though, this valve is for geothermal applications and has a special
      "slow-closing" actuator required in geo applications. Are you using it for
      heating water? That might cause a problem.

      Answered on 3/8/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      They are one in the same ... I too had lots of problems with this power
      unit and I've replaced it about three times in the last 8 years or so.
      Eventually I replaced the valve along with it and I hope that fixes the
      root of the problem. Thinking the valve packing may have experienced
      leakage at times leading to moisture in the power head and failures.

      Answered on 3/9/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      There are several versions of the Taco valve. The one I currently use to control water input for my geothermal furnace is 555-173RP. I suggest not using any version that does not specify that it is for geothermal use. Other versions that I have tried have failed in a year or less. This one has so far worked fine for a year and a half (knock on wood).

      Answered on 3/16/2012 by Another PexSupply Customer
Displaying questions 1-2

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