Product Overview

The Pentair WhisperFlo 1.1 HP Pump | EC-015583 is a high-performance pool and spa circulation pump designed for dependable flow, quiet operation, and efficient hydraulic performance. Built with Pentair’s proven WhisperFlo wet end, this pump is ideal for residential pool systems that need strong circulation for filtration, heating, cleaning, and general water movement.

This model features a 1.1 THP single-speed TEFC motor and supports 115/208-230VAC electrical operation. It is part of Pentair’s updated DOE-compliant WhisperFlo pump lineup, designed to help optimize hydraulic horsepower while maintaining reliable flow performance.

With 2" suction and discharge ports, a large see-through strainer lid, and durable thermoplastic construction, the EC-015583 is a practical replacement or upgrade pump for compatible pool equipment pads.

Ideal For

• Residential inground pools
• Pool and spa combination systems
• Replacing older single-speed pool pumps
• Filtration and circulation systems
• Pool heater flow support
• Pool cleaner circulation support
• Water feature circulation where properly sized
• Equipment pads using 2" plumbing
• Customers wanting quiet pump operation
• Professional pool equipment installations

Key Features

• 1.1 THP pump performance — delivers dependable circulation for compatible residential pool systems.
• Single-speed operation — straightforward pump operation for standard circulation applications.
• TEFC motor design — Totally Enclosed Fan Cooled motor helps improve durability in pool equipment environments.
• DOE-compliant design — updated WhisperFlo model designed to meet modern efficiency requirements.
• 115/208-230VAC electrical compatibility — supports multiple compatible installation configurations.
• 2" suction and discharge ports — supports high-flow plumbing layouts.
• WhisperFlo hydraulic design — engineered for strong flow with reduced operating noise.
• Large-capacity strainer basket — captures debris before it reaches the impeller.
• See-through strainer lid — allows quick visual inspection of basket condition.
• Cam and Ramp lid design — provides easy access to the pump basket for routine cleaning.
• Durable thermoplastic housing — corrosion-resistant construction for outdoor pool equipment pads.
• Compatible with pool and spa equipment — suitable for properly sized filters, heaters, chlorinators, and circulation systems.

Benefits

The Pentair EC-015583 WhisperFlo pump is designed for pool owners who need reliable water movement with quieter operation than many traditional pump designs. Its hydraulic wet end helps move water efficiently through the pool system, supporting filtration, heating, and sanitation performance.

The TEFC motor offers added durability for outdoor equipment environments, while the large basket and clear lid make routine maintenance easier. The dual-voltage capability also gives installers flexibility when matching the pump to existing electrical service.

For pool professionals, the EC-015583 is a strong replacement option for compatible WhisperFlo-style pump installations using 2" plumbing and a 1.1 THP performance requirement.

Specifications

Included Components

• 1 × Pentair WhisperFlo EC-015583 pool pump
• Integrated 1.1 THP TEFC motor
• Pump wet end assembly
• Clear Cam and Ramp strainer lid
• Strainer basket
• Manufacturer-supplied installation documentation

Electrical whip, breaker, bonding wire, plumbing unions, valves, fittings, pump base, automation wiring, and installation labor are sold separately unless specifically included by the supplier.

Compatibility Notes

The Pentair EC-015583 is designed for compatible residential pool and spa circulation systems requiring a 1.1 THP single-speed WhisperFlo pump with 2" suction and discharge plumbing.

Common application references include:

• Pentair WhisperFlo pump replacements
• Residential inground pool filtration systems
• Pool and spa circulation systems
• Equipment pads using 115V, 208V, or 230V electrical service
• Systems requiring 2" suction and discharge connections
• Replacement applications for compatible 1 HP / 1.1 THP WhisperFlo configurations

Always confirm pump sizing, plumbing layout, voltage, breaker requirements, flow needs, filter rating, heater flow requirements, and local electrical code before ordering.

Installation Notes

This pump should be installed by a qualified pool professional or licensed electrician. Proper installation requires correct voltage selection, bonding, grounding, plumbing alignment, priming, flow verification, and startup testing.

Before installation, confirm the pump is correctly sized for the pool, filter, heater, plumbing, and any connected equipment. The pump must be installed on a stable, level equipment pad with proper drainage and service clearance.

After installation, fill the strainer housing with water, secure the lid, open valves, and verify the pump primes correctly. Never run the pump dry.

Customer-Facing Q&A

Q: What is the Pentair EC-015583?
A: It is a Pentair WhisperFlo 1.1 THP single-speed pool and spa pump with 115/208-230VAC electrical compatibility.

Q: What is the SKU?
A: The SKU is EC-015583.

Q: What is the UPC / GTIN?
A: The UPC / GTIN is 788379500986.

Q: What is the related Pentair part number?
A: The related part number is 015583.

Q: What horsepower is this pump?
A: This pump is commonly listed as 1.1 HP / 1.1 THP.

Q: Is this a single-speed or variable-speed pump?
A: This is a single-speed pump.

Q: What voltage does it use?
A: This model supports 115/208-230VAC operation.

Q: What type of motor does it have?
A: It uses a TEFC, or Totally Enclosed Fan Cooled, motor.

Q: What size are the ports?
A: This pump has 2" suction and 2" discharge ports.

Q: Is this pump self-priming?
A: Yes. It is a self-priming pool pump when installed and started correctly.

Q: Does this include unions?
A: No. Plumbing unions and fittings are sold separately unless specifically included by the supplier.

Q: Should this pump be professionally installed?
A: Yes. Professional installation is recommended to ensure correct wiring, bonding, plumbing, priming, and system compatibility.