ECR3702 Series

EcoWater’s elite water softener system is our conditioner, which is offered in a two-tank design. It is highly recommended for either municipal or well water supplies.

Features Galore

The ECR 3702 series boasts some of the most advanced features on the market, including smartphone monitoring, self-cleaning distributors, and more!

The Latest Technology for Water Treatment


HydroLinkPlus® Wi-Fi and Smartphone App Monitoring

HydroLinkPlus® – Wi-Fi enabled technology sends continuous and excessive water use, system error, low salt and service reminder alerts, including a water-to-drain sensing alert notifying you when an excessive amount of water is going to drain.


Patented Electronics Digital Demand Module

Sophisticated, yet easy-to-use electronics capture historical usage patterns to predict future needs for precise regenerations.


High Quality Fit and Finish

including a dampened hinge salt cover

The Latest Technology for Water Treatment


Multi-Wrap Fiberglass Reinforced Resin Tank

Durable tank liner will not deteriorate, rust, or corrode.


Washed Quartz Underbedding

Helps provide a cleaner, more thorough regeneration of the resin.


Patented Stratified Resin Bed

Layered mix of fine and standard size resin provides superior filtration and iron removal without sacrificing flow rate capability.

The Latest Technology for Water Treatment


Full One-Inch Riser with Self-Cleaning Distributors

One-inch diameter for increased flow rates, which ensures that household demand is adequately met. Distributors exhibit excellent flow rates and are cleaned automatically by counter-current water pressure.


Positive-Action Brine Valve

Snap-together construction eliminates use of solvents that may contaminate water. Positive action helps prevent overfilling

ECR 3702 Series Dimensions


ECR 3702 Specifications

Efficiency (gr./lb. @ salt dose) 5,160 @ 1.6
Hardness Capacity (gr. @ max. lb. salt dose) 30,200 @ 11.3
Certified Flow Rate (gpm @ psi) 11 @ 8
Intermittent Flow Rate (gpm @ psi)1  16.5 @ 15
Intermittent Flow Rate (gpm @ psi)1 25.8 @ 30
Stratified Resin Bed (lbs.) 47
Quartz Gravel Base (lbs.) 10
Maximum Water Hardness (gpg @ 500 gpd water usage) 60
Maximum Clear Water Iron (ppm-Fe)2 12
Approximate Water Used Each Regeneration (gal.)3 38
Salt Storage Capacity (lbs.) 300
Supply Water Pressure Limits (psi)4 20 - 125
Supply Water Temperature Limits (oF/oC) 40-120 / 4-49
Ambient Temperature Range (oF/oC) 35-150 / 2-66
Plumbing Connection Provided (inches) 1
Electrical Requirement, 120V, 50/60Hz, (24V DC, 500mA, power supply included)

1 Intermittent flow rate does not represent the maximum service flow rate used for determining the conditioner’s rated capacity and efficiency. Continuous operation at flow rates greater than the certified flow rate may affect capacity and efficiency performance. The validity of these flow rates is verified by NSF.

2 Increased amounts of clear water iron can reduce conditioners efficiency. Refer to owner’s manual for details. Wisconsin requires additional treatment if water supply contains greater than 5 ppm clear water iron.

3 When operated at 35 psi water pressure.

4 Maximum pressure for Canadian use is 7.0 Kg/cm2

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