5101-G3 (3/4" Threaded) Geothermal Valve Zoom

5101-G3 (3/4" Threaded) Geothermal Valve

SKU:5101-G3

Brand: Taco

Taco
Qty Price
$177.95
/ each
$509.85 / box (3 units x $169.95)
In Stock! Ships in 24-48 Hours
(86 Available)
0

Resources

Specs

Application: Zoning
Size: 3/4"
Connection Type: Threaded
Flow Capacity (Cv): 6.1
Flow Range (GPM): 4-1/2-6 GPM
Min Flow (GPM): 4.5
Max Flow (GPM): 6
Body Pattern: 2-Way
Amperage:
?
0.9
Voltage:
?
24v
Hertz: 60
Material: Bronze
Min Temp (F): 40°F
Temperature Range (F): 40°-240°F
Max Temp (F): 240°F
Max Pressure (PSI): 125
Wiring: 3 Wire Terminal Block
Width (Inches): 3-3/8"
Height (Inches): 5.375
Depth (Inches): 2"
End Switch: Yes
Position: Normally Closed

Description for Taco 5101-G3

Taco Geothermal Valves are designed for high-head, open-system zone control. The unique end switch design permits control of the heat pump by the valve, allowing cold water into the coil before the heat pump starts.

5101-G3 (3/4" Threaded) Geothermal Valve

REVIEW SNAPSHOT®

by PowerReviews
Taco5101-G3 (3/4" Threaded) Geothermal Valve
 
3.6

(based on 24 reviews)

Ratings Distribution

  • 5 Stars

     

    (10)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (4)

  • 2 Stars

     

    (5)

  • 1 Stars

     

    (2)

78%

of respondents would recommend this to a friend.

Pros

No Pros

Cons

No Cons

Best Uses

No Best Uses
    • Primary use:
    • Personal (9)

Most Liked Positive Review

 

Cautionary advice for the 5101-G2 Valve

This "Thermal operator" valve has been a long term mainstay valve for geothermal applications where a slow opening and slow closing valve may be needed to prevent water hammer issues with the...Read complete review

This "Thermal operator" valve has been a long term mainstay valve for geothermal applications where a slow opening and slow closing valve may be needed to prevent water hammer issues with the opening and closing of a geothermal water valve. The valve has a 0.9 amp opening current and may also carry the current needed for operation of a primary compressor contactor which in some instances will increase the current load on the thermostat heat and AC compressor ("Y" signal) to as much as 1.25 amps. This was no issue for older mercury or bi-metal type thermostats which were designed to accommodate this high switching current. However, many newer "electronic" and programmable thermostats have contact ratings limited to 0.5 amps. The higher amperage created by this valve can be a problem with thermostat reliability. Higher current loads on the newer electronic thermostats can and will cause stuck contacts (ie the heat or AC will not turn off the compressor after the room thermostat is satisfied and shuts the fan off) or (the thermostat simply fails / burns out due to the high sustained current load).
Those using this valve should be aware of the amperage load imposed by this older design water valve and be certain that it can be managed by the thermostat and or controls within the geothermal system to which it is connected.
As an alternate with a lesser current requirement I might suggest looking at a newer TACO geothermal valve V075T2G2ZA024Q4A1 or its 1" equivalent V100T2G1ZA024Q4A1. These valves draw only 0.48 amps when charging and 0.06 once they are open. There is a full pdf data sheet for them at the following link.
http://s3.pexsupply.com/product_files/Taco%20-%20V100T2G1ZA024Q4A1%20-%20Product%20Overview.pdf

VS

Most Liked Negative Review

 

Not dependable

Has to be replaced often. The valve seat/seal wear too quickly. Then the valve won't close all the way and the water continues to run.I'm changing mine once a year on average and...Read complete review

Has to be replaced often. The valve seat/seal wear too quickly. Then the valve won't close all the way and the water continues to run.I'm changing mine once a year on average and there goes some of the savings on having ground source. The control head has also failed on me twice. [...] You just as well by a whole new valve and head, which is what I have done.

Reviewed by 24 customers

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2.0

Is there anything better?

By Dale

from Ponte Vedra Beach, Fl

Verified Buyer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

We have 2 geothermal units which were installed 3 years ago, thus far we have replace 6 of these valve. I have spoken with our installer and he states, in his opinion these are the best available and does not understand the failures. The valves were failing so often and our a/c service company did not stock this item, when the units went out in the summer, it would be a few days we could get the a/c back in working order.. not good. We decided to purchase and have on hand an EXTRA valve, so it could be replace immediately, if needed. I would like to thank Suppy House for their excellent customer service, just wish there was a better valve available.

  • Primary use:
  • Personal
 
5.0

Exactly what I needed!

By April

from Oklahoma

Verified Buyer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

Exactly what I needed and fast shipping!

  • Primary use:
  • Personal
 
5.0

SupplyHouse service and the product met expectations.

By Andy

from South Bend, IN

Verified Buyer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

This product was used for an open loop geothermal system. It was easy to install and has functioned as expected.

 
3.0

As good as it gets!

By 48 tk.

from Wmspt, Pa

Verified Buyer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

These valves work good for a while but after second year need replaced. Taco needs to come up with a better valve for geothermal use.

  • Primary use:
  • Personal
 
5.0

Product purchase

By Mark

from NY

Verified Buyer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

Reliable.

  • Primary use:
  • Personal
 
3.0

I am told by Customer Serv. 5101-G3 Replaces 5101-G2.

By Ken

from Western NC

Verified Buyer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

Valve seems to work well on my Water Furnace. I am told by Customer Service "the 5101-G3 replaces the 5101-G2." Sure hope so, as the 5101-G2 has to be replaced annually.

  • Primary use:
  • Personal
 
4.0

works wells with geothermal systems ,

By nipple

from SC

Verified Buyer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

good unit , wish power unit was a little stronger

  • Primary use:
  • Personal
 
5.0

Great service and price

By Kathyand

from Boise Idaho

Verified Buyer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

Although you can buy the valve and power source separately, I decided to replace both while I had the system apart. A couple hours later we were back in hot water!

  • Primary use:
  • Personal
 
5.0

"I would buy this product again and again"

By dana

from Bend, OR.

Verified Buyer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

The Taco valve was used to replace a failed valve.
I look at it as I was lucky that the valve was easy to replace and the valve is working well.
The reviews that I read on line about this valve was not good. Every review stated that with in 9 to 24 months I will replace the valve. And there were some reviews that stated that there is a upgraded valve but there were no reviews on the upgraded valve.

  • Primary use:
  • Personal

(0 of 1 customers found this review helpful)

 
1.0

Poor reliability

By Hurl

from Franklinton, LA

Verified Reviewer

Comments about 5101-G3 (3/4" Threaded) Geothermal Valve:

I had two geothermal units installed in my home seven years ago. Since then, I've had to replace the TACO zone valves (5101)twice on one unit and three times on the other. Yesterday,I noticed my well pump was coming on and loosing pressure immediately even when the geo units weren't running. I had the repairman come in and he told me the valves in both units weren't closing properly. Now, that means the valves have to replaced again. Why can't TACO build a valve that lasts longer? This is very frustrating not to mention expensive.

  • Primary use:
  • Personal

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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.

4 Questions | 7 Answers
Displaying questions 1-4
  • 5101-G2 (3/4" Threaded) Geothermal Valve

    Q:

    is this 5101-g2 valve adjustable in any way i am hearing a lot of water hammering when shutting off
    Asked on 5/23/2012 by mike from pennsylvania

    2 answers

    • VERIFIED BUYER

      A:

      You have issues because:
      -Piping layout does not allow for proper flow and water expansion.
      -The geothermal valve needs to be installed after the heat pump ( water out )
      -the valve is a slow close slow open it will not be noisy unless piping size does not match the valve port!
      Sent from my mobile device

      Answered on 5/23/2012 by Anonymous
    • VERIFIED BUYER

      A:

      I have never had a water hammer with this valve except when my helper installed it backwards, been installing them for around 20 years and never an issue , either it has to be defective or backwards !

      Answered on 5/23/2012 by Anonymous
  • 5101-G2 (3/4" Threaded) Geothermal Valve

    Q:

    Normally only two wires are used to connect the water valve, but your valve has three connections. How is the valve connected with only two wires?
    Asked on 3/28/2012 by John from Gainesville, FL

    1 answer

    • VERIFIED BUYER

      A:

      Connect 24VAC between terminals 1 and 2 to open the valve. Terminal 3
      (actually between terminals 1 and 3) is an "end point" switch, which is
      used to tell if the valve is open or closed. Because these valves can take
      up to 90 seconds to open after voltage is applied, Taco recommends that
      thermostat controls the valve, and valve control geothermal unit.
      There is also a wiring diagram on the box and on the unit when you buy one.

      Answered on 3/28/2012 by Another PexSupply Customer
  • 5101-G2 (3/4" Threaded) Geothermal Valve

    Q:

    I am facing the replacement of the 2nd valve of this type on my heat pump system, using well water for the geothermal source. Pressure and temperature are well within the limits for this valve. The first valve failed after 8 months and would no longer open. The second valve now is not closing completely, which allows the well pump to continue to cycle off and on as the pressure tank bleeds off.

    I have removed the spring-seat assembly to check and clean any contamination (there was none). Everything else seems to be in order. Is it likely the entire valve needs to be replaced, or could this be a problem with just the power head?

    Thank you.
    Asked on 3/26/2011 by RandyB from Washington

    3 answers

    • CUSTOMER CARE

      A:

      To see whether or not the power head is working, you will need to check its contacts with a voltmeter.

      Answered on 3/29/2011 by PexSupply Staff from NY
    • A:

      Randy,
      I have the same problem!
      The valve seat washes out, you may have very fine silt from the ground water and with this type of valve seat design the water is very turbulent as it passes by and washes a very small notch out of the seat. You might try a filter before the water gets to your system.

      Answered on 1/28/2012 by steve from Ferndale, WA
    • VERIFIED BUYER

      A:

      Based on my experience with the same valve, if the spring-seat assembly operates freely and there is no leakage, I would say it just needs a new power head. BTW, I was going to buy a spare spring-seat assembly and power head; it turns out that the whole valve is less than the cost of the replacement parts. So I stock a complete valve. If I only need the power head, I have one.

      Answered on 7/26/2011 by LawrenceOfPA from Central PA
  • 5101-G2 (3/4" Threaded) Geothermal Valve

    Q:

    How do you get into the valve body to clean the seat?
    Asked on 8/30/2010 by Anonymous

    1 answer

Displaying questions 1-4

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