ECR 3700 Series

EcoWater’s elite water softener system is our conditioner, available in a single-tank "cabinet" design. It is highly recommended for either municipal or well water supplies.

Plenty of Features

The ECR 3700 water conditioner series comes with plenty of exciting features that ensure extended system use and protection, as well as the latest in digital water softener technology.

There's even smartphone app monitoring, automatic salt-level detection and a water meter for allowing chemical feed dosing with switch flow operation and water usage information!

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.  HydroLink® – Patented two-way remote monitoring also available.


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 with Dampened Hinge Salt Cover


Multi-Wrap Fiberglass Reinforced Resin Tank

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


Patented Stratified Resin Bed

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


Washed Quartz Underbedding

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


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 3700 Series Dimensions

Efficiency (gr./lb. @ salt dose) 5,150 @ 1.1
Hardness Capacity (gr. @ max. lb. salt dose) 20,400 @ 7.5
Certified Flow Rate (gpm @ psi) 9 @ 10
Intermittent Flow Rate (gpm @ psi)1  12.0 @ 15
Intermittent Flow Rate (gpm @ psi)1 19.4 @ 30
Stratified Resin Bed (lbs.) 32
Quartz Gravel Base (lbs.) 8
Maximum Water Hardness (gpg @ 500 gpd water usage) 40
Maximum Clear Water Iron (ppm-Fe)2 10
Approximate Water Used Each Regeneration (gal.)3 27
Salt Storage Capacity (lbs.) 225
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, (28V DC, 500mA, power supply included)

1 Intermittent flow rate does not represent the maximum service flow rate used for determining the softener’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 softener’s 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.

Automatic Bypass During Regeneration Means Continuous Water Usage.  Energy Efficient Power Supply Simplifies installation, maintenance and reduces electrical hazards.

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