ECR3700 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.




  • HydroLink Plus® Wi-Fi and Smartphone App Monitoring
    HydroLink Plus® – 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.
  • Water Meter – Allowing for chemical feed dosing, flow switch operation and water use information.
  • 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.
  • 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.
  • 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.
  • Positive-Action Brine Valve – Snap-together construction eliminates use of solvents that may contaminate water. Positive action helps prevent overfilling.
  • Automatic Salt-Level Detection – Simply add salt, no salt level setting required. Our integrated sensor will detect the salt level and alert you when the salt level is low.


Nominal Resin
Tank Size
8″ Diam. x 35″ 10″ Diam. x 35″
A 44 7/8″ 44 7/8″
B 34 1/4″ 34 1/4″
C 39 1/2″ 39 1/2″

ECR3700_Series dimensions


ECR3700R20 ECR3700R30
Efficiency (gr./lb. @ min. lb. salt dose) 5,150 @ 1.1 5,160 @ 1.6
Hardness Capacity (gr. @ max. lb. salt dose) 20,400 @ 7.5 30,200 @ 11.3
Certified Flow Rate (gpm @ psi) 9 @ 10 11 @ 8
Intermittent Flow Rate (gpm @ psi)1 12.0 @ 15 16.5 @ 15
Intermittent Flow Rate (gpm @ psi)1 19.4 @ 30 25.8 @ 30
Stratified Resin Bed (lbs.) 32 47
Quartz Gravel Base (lbs.) 8 10
Maximum Water Hardness (grains per gallon) 40 60
Maximum Clear Water Iron (ppm-Fe)2 10 12
Approximate Water Used Each Regeneration (gal.)3 27 38
Salt Storage Capacity (lbs.) 225 200
Supply Water Pressure Limits (psi)4 20-225 20-125
Supply Water Temperature Limits (°F/°C) 40-120 / 4-49 40-120 / 4-49
Ambient Temperature Range (°F/°C) 35-150 / 2-66 35-150 / 2-66
Plumbing Connection Provided (inches) 1 1
Electrical Requirement, 120V, 50/60Hz, (24V DC, 500 mA, power supply included)

1Intermittent 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. 2Increased amounts of clear water iron can reduce conditioner’s efficiency. Refer to owner’s manual for
details. Wisconsin requires additional treatment if water supply contains greater than 5 ppm clear water iron. 3When operated at 35 psi water pressure. 4Maximum pressure for Canadian use is 7.0 Kg/cm2.

More Info.

Spec Sheet