Please enter the email address associated with your account and we will send you a link to reset your password.
Your password reset link is on its way. If you have problems accessing your account, please contact us at 888-757-4774 and we'll help you out.
I'm sorry, your email address was not found in our system.
If you think this is a mistake, please contact Customer Service at 888-757-4774 or email us.
Location: 185 Price Parkway, Farmingdale, NY 11735
Hours: 8:00AM - 7:00PM, Mon - Fri
This product does not comply with the "Safe Drinking Water Act,"
which requires that products used in any system providing water for human
consumption (drinking or cooking) to meet low-lead standards.
Please check the box below to confirm you are aware of that this item is for non-potable water applications only.
This product will NOT be used in the installation or repair of a potable water (human consumption) application.
You must agree to this statement in order to purchase this product.
Do not use this item for any installation or repair of potable water applications.
This product does not comply with the "Safe Drinking Water Act,"
which requires that products meet low-lead standards in order to be used in systems providing water for human consumption (drinking or cooking).
This item is for non-potable (non-human consumption) water applications only.
Brand: Uponor (Wirsbo)
We accept returns of any unused and unopened merchandise within 5 days of receipt and accept returns of defective merchandise within 14 days of receipt. All returns must be accompanied by a Return Goods Authorization, which may be obtained by contacting a customer service representative either by phone or by e-mail. All manufacturer warranties are honored and claims should be made through SupplyHouse.com.
See full Return Policy.
Add this item to your cart to calculate shipping cost.
The entire staff at SupplyHouse is committed to doing everything we can to ship your order out accurately and as quickly as possible. Most orders ship within 24-48 hours and expedited orders go out the same day when placed before 3:00pm EST. If an item is back ordered for any reason, you will be notified via e-mail. Please note in the special instructions at checkout if you need receive your order by a specific date.
See full Shipping Policy.
SupplyHouse.com is committed to providing you with the highest quality products at the lowest prices available. We are committed to competitive prices and will honor our Low Price Guarantee if you find an identical item at a lower price.
For complete information on our low price guarantee, go here.
There is a Minimum Advertised Price (MAP) allowed by the manufacturer on this product. Add item to cart for lowest price.
We are dedicated to protecting your order information. Because of this, all personal data that is transmitted through our site is encrypted using SSL or "Secure Socket Layer" technology which encrypts your order information to avoid the decoding of your information by anyone other than SupplyHouse.
At SupplyHouse.com, we are committed to protecting your privacy. This means that we will not distribute, sell or rent your name or personal information about you to any third party without your permission.
For complete safe shopping information, go here.
Your privacy is of great concern to SupplyHouse. We use the information you provide to process your order and to ensure that your experience on our site is as enjoyable and efficient as possible. Our primary focus and greatest concern is you, our customer. We respect your privacy and therefore do not sell, rent or loan any of your personal information to any third party.
We are committed to protecting your privacy. We use the information that we collect about you to process your orders and to provide a personalized shopping environment. When you purchase products from SupplyHouse.com or register for any SupplyHouse.com services, we automatically place you on our list to receive e-mail updates about special offers, new products, and new services.
A credit card Identification Number is an added safeguard for your credit card purchases. Depending on the type of credit card you use, it is the 3- or 4-digit number printed on the back or front of your credit card. For most online credit card purchases from us, the Identification Number is required information.
MasterCard: Your identification number is the 3-digit number found on the back of your credit card near the signature panel.
Visa: Your identification number is the 3-digit number found on the back of your credit card near the signature panel.
American Express: Your identification number is the 4-digit number found on the far right on the front of your credit card.
Voltage, or volts, is a measurement of the difference between two electric fields (in heating terms, the difference between the Earth's electrical field and the electricity running through your wires).
Slow-opening Thermal Actuator (24VAC) mounts directly onto 1 1/4" Brass and truFLOW Valved Manifolds. It provides individual loop flow control on a multi-zoned manifold (manifold serving more than one zone). Thermal Actuator includes end switch for activation of relay (pump), heat plant or other auxiliary devices. Do not mount actuators upside down.
(based on 32 reviews)
of respondents would recommend this to a friend.
Most Liked Positive Review
Great design -- Time will tell
This controller replaces Wirsbo motorized controllers that failed after only 5 years in residental use. The motorized actuators open much more quickly. In discussions with Uponor tech support, it seems that Uponor is...Read complete review
This controller replaces Wirsbo motorized controllers that failed after only 5 years in residental use. The motorized actuators open much more quickly. In discussions with Uponor tech support, it seems that Uponor is aware that the motorized controllers have durability problems. However, after some frank comments on my part, the Uponor tech suggested these thermal actuators would likely last a lot longer and perform well if 6 minute switch times were acceptable. So far, so good. The switches are German-made, compact, and sheathed in high-quality molded plastic. They directly replace the motorized actuators and can be mixed with the motorized actuators.
Most Liked Negative Review
Don't Know yet
My in-floor radiant heating system uses 13 valve actuators. In 11 years of service, 3 motorized actuators have failed. Apparently the mechanical zone valves get sticky and the valve actuators exert a lot...Read complete review
My in-floor radiant heating system uses 13 valve actuators. In 11 years of service, 3 motorized actuators have failed. Apparently the mechanical zone valves get sticky and the valve actuators exert a lot of force to open them. All of the motorized valve actuators in my system have failed because the plastic parts on the actuator are too weak and they break. I have not used the new style thermal actuators yet and I am somewhat apprehensive that because they are all plastic, that they too will break if they have to exert a lot of force on a sticky valve. There are no alternative devices, so I guess we have to use the new design actuator. At least they are less costly than the old style. I hope to be pleasantly surprised and the new ones will hold up for a long time.
Reviewed by 32 customers
Displaying reviews 1-10
Back to top
Previous | Next »
Comments about Thermal Actuator, Four-Wire:
Perfect replacement for my thermal actuator. Easy to install and much easier to tell if it's open or closed. Time will tell how long lasting it will be.
Bottom Line Yes, I would recommend this to a friend
Was this review helpful? Yes / No
- You may also flag this review
Easily installed by homeowners
By Mark Carlson
from La Conner, Wash.
The pictogram-style installation instructions were clear enough, and installation of the made-in-Germany actuators went smoothly, sparing me from an expensive service call by the HVAC guy. The supplied rings were too small for my manifold but the actuators snapped on to the existing rings, which were slightly larger than the ones than came with the units. My hydronic system is now functioning as it should. I hope these actuators will last longer than the Roths they replaced.
There's 28 zones in our system
from Allentown, New Jersey
Our system is nine years old, has 28 zones and I've had to replace all of these actuators once and some twice. Heat,this is a heating system, eventually causes the retaining clips to fail rendering the actuator useless. We're stuck with this system as to use better actuators we would have to replace all the manifolds.
Bottom Line No, I would not recommend this to a friend
I would buy agin if I need another.
Huge improvement vs motorized actuators!
from Auburn, CA
I recently replaced all the older-style motorized Wirsbo actuators with these thermal actuators. They work much better and more reliably. With the motorized actuators, I sometimes had the situation where the thermostat called for heat but the actuators would not turn the pump on, OR the pump was incorrectly on when the valves were closed. These new thermal actuators solved those problems 100%. They are very easy to install; just be sure to initially cycle all zones through one on/off cycle, as the actuators come in sort of a "half-on/half-off" state.
Identical Replacement was fast & easy
By Rod the Homeowner
from Placitas, New Mexico
I ordered replacements for the motorized Wirsbo actuators from PexSupply using their website. They arrived promptly. It took atmost 15 minutes to install and test each actuator. The Uponor replacements work perfectly and all heat zone problems are fixed. The local indicator is a handy diagnostic. After nearly a month of using them, my only regret is that I did not order enough actuators to replace all the old units in my system.
Good replacement actuator
from Norman, OK
Easy to install.Worked good
can't wait to try them
from hot springs village arkansas
These were bought to replace the actuators that give me problems. I haven't used any yet so they are like a stand by.I had problems with the first & second style modulators.I wish that there were instruction sheets enclosed,I guess it a learn as you go thing.
from Dow City, Ia
The product seems to be much better and quieter than the actuator that it replaces. I do think that shipping on the product could have been quicker.
works well but...
from Snohomish, Wa.
The instructions were so simple that they didn't provide enough information on how they were initialized. This led us to return the first set and the house remained cold till the new set arrived. When they didn't work your customer service sent us to the manufacturer.
Do you have questions about this product?
get answers from real customers and in-house experts with AnswerBox.
Know the answer? Answer this question
Do you have a question about this product?
Page 0 of 1
Subscribe to our Channel
Like Us on Facebook
Visit Our Blog
At SupplyHouse.com, our goal is to bring you the highest quality plumbing, heating and HVAC supplies at competitive prices. Our product catalog includes PEX Plumbing Supplies, Radiant Heat Supplies, VisionPro Honeywell Thermostats, Taco pumps and mini-split air conditioners. If there are items you are looking for but can't find on our website, please contact our Customer Service Representatives & we will do our best to find what you need.
© 2014 SupplyHouse.com