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I100T4R-1 has been discontinued
Discontinued October 30, 2025
This product was discontinued by the manufacturer.
MANUALS (3)
Product Highlights
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FNPT x FNPT Connection
1"
9.3 Cv
150°F Max Temp
85°F Min Temp
85°F - 150°F
Description
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Taco iSeries+ Mixing Valves provide precise and cost-effective temperature control for your heating systems, the flexibility of zone-to-zone control, plus built-in boiler protection.
- Available in 2-way, 3-way or 4-way injection configurations
- For either outdoor reset control or fixed water supply temperature applications
- Protects boiler against flue gas condensation
- Operates Off Constant Power or Relay End Switch
- Ball Valve Design, High Cv
- Manual Operation Button
- Solid-State Microprocessor Design
- Easy, One-Hand Actuator Removal
- Multi-Status LED Indicator Light
Specs
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| Body Pattern: | 4-Way |
|---|---|
| Connection Type: | FNPT x FNPT |
| Application: | Hot and Chilled Water, up to 50% Glycol Heating Closed Systems |
| Connection Method: | Threaded |
| Size: | 1" |
| Min Temp (F): | 85°F |
| Max Temp (F): | 150°F |
| Temperature Range (F): | 85°F - 150°F |
| Max Pressure (PSI): | 300 |
| Ambient Conditions: | Indoor Use Only -22°F to 185°F < 90% Non-Condensing |
| Sensors: | NTC Thermistor, 10 k ohm @ 77°F |
| Seat Leakage: | Drop-Tight Close Off |
| Voltage: | 24V |
| Hertz: | 60 |
| Amperage: | 0.4 |
| Fluid Temperature Range: | 20°F to 240°F |
| Height: | 3-15/16" |
| Width (Inches): | 2-3/8" |
| Flow Capacity (Cv): | 9.3 |
| Features: | Outdoor Reset |
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Product Reviews
4.8 out of 5 reviews
100% would recommend this product
5 star
80%
4 star
20%
3 star
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Showing 1-5 of 5 reviews
Great product, makes the house super comfortable
We had a company replace our 50 year old boiler and they did a poor job. No one would even reccomend outdoor reset, and our new boiler was condensing (not supposed to!) so I decided to replumb it myself with this valve. I wanted it for energy savings and boiler protection, but I never realized how awesome it made the house feel. It's always comfortable throughout the house and the valve works like a charm. A little complicated to plumb in tight spaces with copper, but totally worth the price. Very glad we got this valve.
Ocelaris
New Jersey
10 years ago
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Great product for the price
Used on a job that had solar with radiant floor and a boiler backup. it worked well.
josh
Boulder, CO
11 years ago
Verified Buyer
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works ,but needs tweeking
4 way mix for my slab heat in 1200sf shop, works as intended BUT you have to play with it ie> their is no "low temp",0-110 deg on a warm day (over 25 or so) you have to "reset it -or it will just "turn the water in the slab" without adding heat! and the sensors must be placed right on a metal surface NO PEX (in stall coupling to fasten it to for better readings) it works but the temps do rise a fall more than I think it should ..taco should redo the circuit board and place a low end on the 100 circuit
atvalaska
alaska
12 years ago
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Works well and as advertised
Used to control temperature of supply water to 3 zone in-floor radiant heating system in a 2000 sq ft home. Valve is wired directly to a 24V AC power source, have not observed any issues with having the valve constantly powered. The valve works well, responds quickly to changes in supply or return water temperature, and appears to control temperature accurately based on my downstream thermometers. Outdoor reset responds accordingly. Did not evaluate the boiler protection feature, as I have a separate device controlling return water temps to my boiler. Installation and setup is easy for a competent DIYer. Kudos to PexSupply as being the only place I could find this valve IN STOCK and ready to ship.
Aaron
Southeast Michigan
13 years ago
Verified Buyer
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Really works!
This valve works great, but you must mount it in the correct orientation. There is only one way to mount it. But it returns correct water temperature to the boiler and also sends the right temperature to the concrete floor.
Johnny Hydronic
Hayward, WI
16 years ago
Verified Buyer
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Product Q&A
3 Questions3 Questions
Q: What controls the 15 degree night set back on the I series temp valve
Asked by Tom 11 years ago
Add your answer
Verified Reply- SupplyHouse StaffThe setpoint target is lowered by 15ºF whenever there is a contact closure across the SETBACK and SENSOR COMMON terminals. If a timer or setback device is used, connect the device across the SETBACK and SENSOR COMMON terminals on the iSeries-S. Setback is used to provide energy savings by lowering the target temperature.
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Q: Does this come with any sensors? if not, is there a recommended model sensor to use for the boiler return and system supply sendors?
Asked by Ryan 13 years ago
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Yes, it comes with both sensors
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This valve came with all the sensors when I bought it. Supply, return and outside sensors.
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Q: Can you use the R output on the end switch on the Wirsbo zone control module as the switched 24vac power input for the 4 way mixing valve?
Asked by Don 15 years ago
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Verified Reply- PexSupply StaffNo, you cannot do this.
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