Product Overview

The Pentair C-Series CM-75 Commercial Pump | 347917 is a heavy-duty 7.5 HP medium-head bronze circulation pump designed for large commercial swimming pools, aquatic facilities, fountains, water attractions, and other demanding high-flow water applications.

This configuration includes the integral bronze hair-and-lint strainer pot with stainless steel basket, making it a complete commercial pump and strainer assembly ready for integration into a properly designed circulation system.

The CM-75 uses a rugged all-bronze hydraulic assembly, 230V single-phase motor, and Pentair's proven C-Series back-pull-out design for easier commercial service and maintenance.

This model is specifically the MEDIUM HEAD CM-75 configuration. It should not be confused with the CH-75 high-head version, which uses a different hydraulic impeller and performance curve.

Ideal For

• Commercial swimming pools
• Hotels and resorts
• Municipal pools
• Schools and universities
• Recreation centers
• Competition pools
• Large HOA and apartment pools
• Commercial spas
• Fountains and water attractions
• High-flow filtration systems
• Aquatic facilities

Key Features & Benefits

• 7.5 HP Commercial Pump – Built for demanding commercial circulation applications.
• Medium-Head Configuration – CM-Series hydraulic design optimized for high-flow, moderate-head systems.
• 230V Single Phase – Designed for facilities requiring single-phase electrical service.
• Integral Hair & Lint Strainer – Includes heavy-duty bronze strainer pot and stainless steel basket.
• All-Bronze Hydraulic Construction – Provides exceptional strength and corrosion resistance.
• Bronze Impeller – Durable commercial-grade impeller engineered for continuous operation.
• Stainless Steel Pump Shaft – Provides excellent strength and corrosion resistance.
• Back Pull-Out Design – Allows the motor, shaft, seal, and impeller assembly to be serviced without disturbing the main plumbing.
• ANSI Flanged Connections – Commercial 6" suction and 4" discharge connections.
• Continuous-Duty Design – Built for demanding commercial aquatic applications.
• NSF Listed – Suitable for applicable commercial swimming-pool circulation installations.

Specifications

Complete Pump with Strainer Pot

This listing is for the CM-75 with the commercial hair-and-lint strainer pot included.

The C-Series strainer assembly features:

• Heavy-duty bronze strainer body
• Stainless steel strainer basket
• Large commercial suction connection
• Serviceable strainer cover
• Heavy-duty commercial construction

The strainer helps capture leaves, hair, and larger debris before they reach the pump impeller.

Medium Head vs. High Head

IMPORTANT COMPATIBILITY INFORMATION

Pentair offers both medium-head and high-head 7.5 HP C-Series pumps.

CM-75 | 347917

7.5 HP – Medium Head – 230V – Single Phase

Uses the 070227 medium-head impeller.

CH-75 | 347916

7.5 HP – High Head – 230V – Single Phase

Uses the 073829 high-head impeller.

These pumps have different hydraulic performance curves and should not be substituted solely because they use the same horsepower motor.

The correct pump should be selected based on the system's required flow rate and total dynamic head.

Heavy-Duty Bronze Construction

Pentair designed the C-Series for demanding commercial environments.

The hydraulic assembly uses commercial-grade materials including:

• CA 84400 bronze pump body and motor adapter
• CA 83600 bronze impeller
• 303 stainless steel shaft
• Stainless steel strainer basket
• Heavy-duty cast-iron support base

This construction makes the C-Series especially suited for high-use commercial aquatic facilities where durability and serviceability are critical.

Back Pull-Out Service Design

The C-Series uses a back pull-out pump design.

Service technicians can remove the motor, shaft, seal, and impeller assembly from the rear of the pump without disconnecting the main suction and discharge plumbing.

This can significantly simplify:

• Mechanical seal replacement
• Motor replacement
• Impeller replacement
• Internal inspection
• Routine commercial pump maintenance

Electrical Requirements

The 347917 CM-75 requires 230V, single-phase, 60 Hz electrical service and is rated at approximately 37 amps.

Pentair specifies that C-Series pumps require an appropriate external thermal overload protector.

Commercial electrical installation should be completed by a qualified electrician and must comply with applicable electrical and pool-equipment codes.

Frequently Asked Questions

What is Pentair part number 347917?
It is the Pentair C-Series CM-75, 7.5 HP medium-head commercial bronze pump with strainer, 230V single phase.

Does this pump include the strainer pot?
Yes. This configuration includes the bronze commercial hair-and-lint strainer pot and stainless steel basket.

Is the CM-75 medium head or high head?
Medium head.

What is the high-head 7.5 HP version?
The comparable high-head 230V single-phase model is the Pentair CH-75 | 347916.

What impeller does the CM-75 use?
Pentair specifies 070227 as the 7.5 HP medium-head impeller.

What size are the plumbing connections?
The pump uses a 6" ANSI-flanged suction connection and 4" ANSI-flanged discharge connection.

Is it three phase?
No. 347917 is 230V single phase.

What is the three-phase medium-head version?
Pentair uses the CMK-75 designation for applicable three-phase medium-head configurations.

Why Buy From Pool Supply Depot?

Pool Supply Depot supplies genuine Pentair commercial pumps, C-Series motors, impellers, shaft seals, strainers, baskets, filters, heaters, automation equipment, and OEM replacement parts for hotels, municipalities, schools, aquatic facilities, pool contractors, and commercial properties nationwide.

Commercial pumps should be selected according to the required GPM, total dynamic head, voltage, and phase. If you're replacing an existing C-Series pump, send us the pump model and motor information and our team can help verify the correct replacement.

Order the Pentair C-Series CM-75 Medium Head Commercial Bronze Pump with Strainer, 7.5 HP, 230V, Single Phase | 347917 from Pool Supply Depot today.