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

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

SKU:5101-G3

Brand: Taco

Taco
Qty Price
$169.95
/ each
$494.55 / box (3 units x $164.85)
In Stock! Ships in 24-48 Hours
(45 Available)
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Specs

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

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
 
3.4

(based on 14 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (4)

  • 1 Stars

     

    (1)

71%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

Silenced My Knocking Pipes

I used this Taco valve to replace a sprinkler-type valve that was controlling the water flow on my geothermal system. Before using this valve I tried several different knock arrestors to quiet down the...Read complete review

I used this Taco valve to replace a sprinkler-type valve that was controlling the water flow on my geothermal system. Before using this valve I tried several different knock arrestors to quiet down the noise caused when the valve kicked on and off. None of them worked completely, and frankly I was afraid the pipes in the basement were going to come loose from the ceiling, the knocking was so bad. After installing this Taco valve, all the knocking went away. When the geothermal system turns on or off there is absolutely no sound at all from the pipes. Now if I can only figure out how to silence the fan and compressor...

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 14 customers

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4.0

Cautionary advice for the 5101-G2 Valve

By GeoJeff

from Columbus, Ohio

Verified Buyer

Comments about 5101-G2 (3/4" Threaded) Geothermal 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 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

 
3.0

Should Last Longer

By shar2298

from Jacksonville, FL

Verified Buyer

Comments about 5101-G2 (3/4" Threaded) Geothermal Valve:

We have two geothermal units and these are basically the only valves available. We've had to replace these valves 4 times in the last 5 years. When they work, they are great - quiet, no hammerlock - but for the price, they should last a lot longer. The valve is way too sensitive for well water which can be slightly on the hard side or contain infrequent fine sediment. I would recommend them since they are about the only semi-decent valve available.

(1 of 1 customers found this review helpful)

 
2.0

Not Reliable

By DelDave

from Lewes, DE

Verified Buyer

Comments about 5101-G2 (3/4" Threaded) Geothermal Valve:

I have five of these valves in my geothermal system. At least one per year fails. Either the head or the internal mechanism in the valve body. The head is about $50.00 to $100.00 to replace, the internal mechanism about $150.00 to replace. If you are handy, the replacement is easy. When the valves work, they work OK.

TACO now sells a geothermal ball valve. I don't know anyone who has any experience with them. But if I ere putting in a new system, I'd go for the ball valve type. It would be a job to replace the current valves.

(1 of 1 customers found this review helpful)

 
2.0

Rust and wear causes these to fail

By Jon who thinks geothermal is too $$

from ottawa, canada

Verified Reviewer

Comments about 5101-G2 (3/4" Threaded) Geothermal Valve:

For the price of this valve, I would expect something that would last for many many years. Instead, count on only getting a couple of years, at best. In a humid basement (even with dehumidifiers), the metal will rust quickly. Combine that with the wear from normal usage and the valve will begin to seize, requiring replacement. If you can do it yourself, no problem, replace the whole thing. Many contractors just replace the head and call it fully serviced (while charging full price). For the short lifespan, it should not cost more that $20 - $30... over $160 is outrageous. Definately needs major improvement.. I'd buy something else if there were something else to buy.

 
4.0

Good...But...

By Bugman

from walnutport,pa

Verified Buyer

Comments about 5101-G2 (3/4" Threaded) Geothermal Valve:

Works very good but I have slightly acidic water from my well and this valve will last only about 1 1/2 years(leaks thru)...can't find an alternate replacement yet...

 
3.0

We'll See

By Farmer

from Kansas

Verified Buyer

Comments about 5101-G2 (3/4" Threaded) Geothermal Valve:

This valve was to replace an identical one on the outlet side of my geothermal unit. The old valve (only in place about three years)failed to close completely letting water leak through continuously. I hope the new one lasts longer, but that seems to be the complaint with these valves - they don't last.

(1 of 1 customers found this review helpful)

 
2.0

Worked great new but didn't last.

By Ron

from Cody, Wyoming

Verified Buyer

Comments about 5101-G2 (3/4" Threaded) Geothermal Valve:

I replaced my first 5101-G2 valve after only 2 years of use.I am using the 5101-G2 valve on a heat pump. The valve portion worked flawlessly but the end switch only worked properly very off and on. Installed a new valve and it's working fine so far.

 
5.0

Quiet operation on my geothermal HVAC.

By bill

from NE Alabama

Verified Buyer

Comments about 5101-G2 (3/4" Threaded) Geothermal Valve:

I had a bad water hammer problem. I installed an Asco slow closing valve and still had the same problem. I added this Taco valve in parallel and now the problem is solved. My wife is happy...need I say more?

 
5.0

Top of the line

By Sam

from Bronson Mi

Verified Buyer

Comments about 5101-G2 (3/4" Threaded) Geothermal Valve:

Taco make some of the best products. I am very satisfied. I have one installed on my main Geo Thermal unit 1 year ago with zero problems and it works just how it is intended to work.

 
5.0

Fixed water hammer problem

By farley

from louisiana

Verified Buyer

Comments about 5101-G2 (3/4" Threaded) Geothermal Valve:

Had a terrible water hammer when my water source heat pump would shut off. Installed this Taco geothermal valve and now it is absolutely silent!

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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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