Protect high-demand equipment
Helps reduce scale across heating elements, spray systems, valves and connected fixtures.
Pentair
Tank-Based Softener
4.0 m³/h flow
Pentair PW AutoSoft 1665 Higher-flow automatic softening for larger demand.
A tank-based automatic softener using a 16 × 65 inch FRP vessel and 5800SXT control platform for high-demand kitchens and whole-line applications.
Site assessment
Installation guidance
Genuine cartridge support
AMC planning
Key Benefits
What this system helps you achieve
Better wash results
Softened water supports cleaner dishes and glassware with less spotting and residue.
Lower operating burden
Improves detergent efficiency and reduces manual deliming and scale-related service.
Automatic regeneration
5800SXT control supports flow and time-based regeneration for higher-demand applications.
Application Fit
Is it suitable for your site?
Best for
- High-demand commercial kitchen lines
- Dishwashers, glasswashers and multiple fixtures
- Sites requiring approximately 4.0 m³/h flow
- Installations suited to a 16 × 65 inch FRP tank
Check before ordering
- Complete hardness and source-water report
- Peak flow, daily softened-water volume and regeneration load
- Space for treatment vessel and 100 L brine tank
- Drain, 12 V DC power and 1 inch BSPF plumbing
| Product Name | Pentair PW AutoSoft 1665 | Model Description | 1665 tank with 5800SXT softening system |
|---|---|
| Application | Higher-demand automatic water softening for commercial kitchens and whole-line applications |
| Flow Rate | 4.0 m³/h at 15 psi pressure drop |
| Backwash Flow Rate — Valve Alone | 3.9 m³/h |
| Recommended Media Volume | 125 L |
| Tank Size | 16 inch diameter × 65 inch height |
| Inlet / Outlet | 1 inch BSPF |
| Operating Pressure | 2–6 bar |
| Mounting Base | 2.5 inch – 8 NPSM |
| Distributor Size | 1.05 inch |
| Brine Tank Capacity | 100 L |
| Drain / Brine Connections | 1/2 inch NPTF drain; 3/8 inch brine line |
| Controller Voltage | 12 V DC |
| Regeneration Mode | Flow and time based |
Trust Signals
Backed by brand credibility, certification and local support
Pentair component confidence
Aquainwent supports Pentair softener selection, supply and project coordination in India.
Aquainwent brochure specifications
Flow, pressure, valve, media and connection data are based on the current Aquainwent softener brochure.
Warranty and commissioning support
Warranty, installation and commissioning scope are confirmed through the official quotation.
Salt, resin and AMC planning
Performance depends on correct media loading, brine management, regeneration settings and scheduled service.
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Why This Model
When PW AutoSoft 1665 makes sense
A higher-flow tank-based automatic softener for sites that need approximately 4.0 m³/h flow and have room for a separate vessel and brine tank.
1
Higher-capacity tank format
Uses a 16 × 65 inch FRP vessel and 125 L recommended media for larger hardness loads.
2
5800SXT automatic control
Supports flow and time-based regeneration for consistent operation in higher-demand applications.
3
Sized around real demand
Hardness, peak flow, daily volume, regeneration frequency and brine capacity must be checked together.
Process
From water check to
From water check to
ongoing support
Share water data
Hardness, water source, operating hours and connected demand.
Verify sizing
Peak flow, media capacity, regeneration frequency and brine requirement.
Plan installation
Vessel, brine tank, bypass, drain, controller power and plumbing.
Maintain performance
Salt refill, valve checks, resin inspection and scheduled AMC.
Customer Confidence
Built for commercial operations teams
Higher-demand protection
Hardness removal helps reduce scale across multiple connected equipment points.
Automatic control
5800SXT programming supports planned regeneration with lower manual intervention.
Lifecycle support
Salt, resin, drain and valve maintenance are included in service planning.
Pricing depends on hardness load, media, plumbing, bypass, installation scope and service coverage. Aquainwent confirms pricing after sizing the system.
Installation guidance and coordination can be provided after checking vessel location, brine-tank space, drain, controller power and plumbing.
Regeneration frequency depends on hardness, 125 L recommended media capacity and actual water use. Final settings are determined during commissioning.
Share the water report, peak flow and daily volume. Aquainwent can confirm AutoSoft 1665 or recommend 1354, HydraSmart or another configuration.
Maintain salt, inspect the brine and drain lines, review 5800SXT settings and schedule valve and resin service based on operation.
Not sure if PW AutoSoft 1665 is the right size?
Share your hardness report, peak flow, daily volume and installation space. Aquainwent will help verify the correct Pentair softening system.
