'/%3E%3C/svg%3E)
Hover image to zoom
 --%3E %3Csvg version='1.1' id='Fill' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23F15C02' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
Hover image to zoom
' fill='%23F15C02' d='M49 0C21.938 0 0 21.938 0 49s21.938 49 49 49 49-21.938 49-49S76.062 0 49 0m0 82.709a7.54 7.54 0 1 1 0-15.08 7.54 7.54 0 0 1 0 15.08m7.54-28.412a7.541 7.541 0 0 1-15.08 0V22.831a7.54 7.54 0 0 1 15.08 0v31.466z'/%3E%3C/svg%3E)
ZVC404-4 has been discontinued
Discontinued September 11, 2025
This product was discontinued by the manufacturer.
MANUALS (4)
This item replaces: ZVC404-2
Direct Replacement:
4 Zone Next Generation Zone Valve Control with Priority
Product Highlights
–
120v
4
10-1/4" Width
6.75" Height
2-3/4" Depth
Description
–
Taco Zone Valve Controls work with two, three, or four-wire zone valves. Fully fuse protected,
they also include two isolated end switches and a built-in priority switch. The contractor friendly
PC board layout eliminates the problems caused by incorrect wiring and the unfinished look of
conventional zone valve installations. The sturdy screw connections add additional reliability, while
the external indicator lights provide instant diagnostic feedback, reducing installation time. All Taco
Zone Valve Controls are UL and CSA listed and carry an extended 3 year warranty.
Use them combined with Taco Zone Valves and Thermostats to maximize system performance and dependability.
Features include:
Use them combined with Taco Zone Valves and Thermostats to maximize system performance and dependability.
Features include:
- External Indicator Lights
- Switchable Priority
- Simplified Wiring
- Works with 2, 3, or 4-Wire 24V Zone Valves
- Compact Design
- Fuse Protected
- 100% Factory Tested
- Two Isolated End Switches
- Extra Set of Dry Contacts
- Contractor Friendly PC Board Layout
- Universal Thermostat Compatibility
- UL and CSA Approved
- Sturdy Screw Connections
- Extended 3 Year Warranty
Specs
–
| Number of Zones: | 4 |
|---|---|
| Application: | Zoning |
| Width (Inches): | 10-1/4" |
| Height (Inches): | 6.75" |
| Voltage: | 120v |
| Depth (Inches): | 2-3/4" |
| Wiring: | PC Board |
Questions?
Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
Monday – Thursday
8am–7:45pm
Friday
9am–7:45pm
Saturday – Sunday
9am–5:45pm
Compare Similar Products
Brand
Number of Zones
You May Also Need
Product Reviews
4.84 out of 37 reviews
97% would recommend this product
5 star
89%
4 star
5%
3 star
5%
2 star
0%
1 star
0%
Customer Images
Most Liked Positive Review
Much better than wire spaghetti
I have four thermostats (two smart, two dumb) and four zone valves. One of the zone valves wasn't working and I couldn't figure out what was wrong with the mess of wires coming and going between thermostats, zone valves, power supply, and boiler. Rather than call in a pro, I decided to buy and install this Taco zone controller on my own. I got it wired up in a couple hours and that problem zone valve is now working fine.
After I initially got it wired up with one thermostat per zone, I decided I wanted to combine zones and use only two of my thermostats (one upstairs, one downstairs). I emailed Taco for advice and they responded promptly with a solution (put two zone valve wires into the output terminals for one zone). Now I have two smart thermostats each controlling two zone valves. As a bonus, I now have an actual c-wire to use with my new smart ecobee3 thermostat.
It would be cool if this controller also included some "smart home" features like z-wave integration to help control zones or to monitor when zones are energized, but that's probably too much to hope for at this price point. As it is, this controller is a huge bang for the buck.
VS
Most Liked Negative Review
 --%3E %3Csvg version='1.1' id='With-RB' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23FBC8B4' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
Nice unit but hums due to very cheap transformer
In most respects this is a pretty well made controller that does what it is supposed to do. However, the 24V transformer hums at the line frequency, and that hum can be "amplified" if the controller is mounted to a sounding board like a sheet of plywood. In case the mfg should ready this, please ask your supplier to use a proper strap for the transformer and to _not_ spot weld the mount to the laminations - thereby shorting them together !!! I am sure that Basler electric knows this, but what works for a 1KVA transformer is not necessarily appropriate for a 15VA transformer. A partial workaround is to drill out the rivets and replace with #10 nylon screws.
Showing 1-10 of 37 reviews
Nice unit
This simplifies our system, but more importantly, gives you feedback on which thermostats are on and which valves are open.
Jon
Michigan
1 years ago
Verified Buyer
Was this review helpful to you?
Cleaned up my rats nest of wiring for 7 zones of heating
The original installer did a horrible job of wiring my system.
I added a zone and have been upgrading all my 2 wire old school thermostats to smart home thermostats. Since they required a C wire I was forced to run new wire to each thermostat. This worked ok, but took a while to figure out what was going on with all the zip tied bundles of wires.
I got two Taco controllers and was able to simplify the wiring significantly. In addition, it was way easier to diagnose issues because you have some idea of stages that the thermostat/zone valve/circulator are going through. I had one zone that must have had a broken conductor so I had to swap to a different wire for my C connection. In the old wiring this was a pain, with the Taco it was simple.
JJ
NJ
3 years ago
Verified Buyer
Was this review helpful to you?
Excellent
Works great easy to install
Jose Gonzales
Riverside RI
3 years ago
Verified Buyer
Was this review helpful to you?
Very Versatile with many Configs Possible
Used this in a garage heater setup to control varios devices from my wood boiler. Sharp looking unit with good directions.
Huggmeister
Western NY
3 years ago
Was this review helpful to you?
Must have for multiple zone valves
Simple wiring multiple zone and provides for priority of indirect water heater with separate pump. Good supply voltage for installation of smart thermostats
Ando
Verona, N.J.
4 years ago
Verified Buyer
Was this review helpful to you?
Works as expected, easy to setup
I purchased this to install on my oil burner to service 3 zones that already had valve controls but no panel. I'm not an HVAC technician, but I was able to follow the diagrams and instructions to get this working the first time without any issues.
Josh N
Long Island, NY
5 years ago
Verified Buyer
Was this review helpful to you?
Well made, easy to install
Easy to wire, simple design.
Phil
Worcester, MA
5 years ago
Verified Buyer
Was this review helpful to you?
Good, would buy again
Nice DHW priority option. A must for indirect fired water heater zone.
Will Mahl
Winhall,Vermont
6 years ago
Verified Buyer
Was this review helpful to you?
Great product and Service
This is an excellent product and easy to install by anyone with a little electrical knowledge and understanding of thermostats and zone valves. Watch their YouTube videos.
I highly recommend Suplyhouse.com. The local plumbing/ heating supply stores would not sell this to me because I wasn't a linseed contractor.
Shawn
CT
7 years ago
Verified Buyer
Was this review helpful to you?
Yes Great Product
Din everything I wanted and more
Ace
Mohnton PA
7 years ago
Verified Buyer
Was this review helpful to you?
Product Q&A
4 Questions4 Questions
Q: Can I run pumps instead of zone valves with this unit
Asked by BIGFUN 10 years ago
Add your answer
Verified Reply- SupplyHouse StaffNo, the ZVC404-4 will control the operation of zone valves. For control of multiple pumps with a priority feature you would need a switching relay such as the Taco SR504-EXP-4
Was this review helpful to you?
Q: can this zone control module control a single zone with 2 loops, and 3 zones with a single loop each? The install instructions only show a single zone control valve wired to single loop. Can you also confirm that it can control a recirculating pump in the heat exchanger loop? Thank you.
Asked by John 11 years ago
Add your answer
Verified Reply- SupplyHouse StaffYes, multiple valves can be wired to the same zone. Multiple circulators can also be triggered as well, note the "Optional System and/or DHW and/or Secondary Circulators" diagram on the installation manual.
Was this review helpful to you?
Q: Do you stock the expansion cards for this unit? If so what are the part numbers so they can be ordered?
Asked by John 11 years ago
Add your answer
Verified Reply- Supplyhouse StaffIts not an expansion card, you can just link multiple units together.
Was this review helpful to you?
Q: Is this zone valve control module compatible with the two-wire Mr PEX Thermal Actuator (5120701), or will it only work with the four-wire? I'm planning to hook this up with the Taco X Pump Block, and I am not planning to have an end switch. Thanks!
Asked by plumbingfriend 12 years ago
Add your answer
Verified Reply- Supplyhouse Staffyes it will work
Was this review helpful to you?