Product Overview

The Pentair IntelliFlo3 Volute Assembly with Hardware 356175Z is a genuine OEM replacement housing assembly designed for compatible Pentair IntelliFlo3 VSF and Sta-Rite IntelliPro3 VSF pool pumps. The volute forms the main hydraulic housing of the pump and contains the strainer pot where water enters before passing through the basket and into the impeller.

This replacement assembly is ideal when the original pump housing is cracked, warped, leaking, or damaged by freezing, impact, excessive plumbing stress, or long-term exposure to pool chemicals. Replacing the volute can restore proper suction, priming, debris capture, and sealing without requiring replacement of the complete pump.

The kit includes the volute housing, lid components, sealing parts, and required mounting hardware. Internal hydraulic components and electrical components are not included and must be transferred from the existing pump or purchased separately.

Key Features

• Genuine Pentair OEM replacement assembly
• Designed for compatible IntelliFlo3 VSF pumps
• Compatible with select IntelliPro3 VSF pumps
• Replaces a cracked, leaking, or damaged pump housing
• Includes strainer-pot and lid components
• Includes required installation hardware
• Restores proper suction and hydraulic sealing
• Helps correct frequent loss-of-prime conditions
• Durable construction for outdoor pool-equipment environments
• Allows reuse of compatible motor and drive components
• Factory-designed for accurate fit and alignment

Benefits

• Repairs the pump without replacing the complete unit
• Helps eliminate water and suction-side air leaks
• Restores proper basket sealing and debris collection
• Maintains correct alignment of internal pump components
• Reduces the risk of debris reaching the impeller
• Genuine OEM construction supports reliable performance
• Cost-effective solution when the motor and drive remain operational

Specifications

Kit Includes

The Pentair 356175Z assembly generally includes:

• Volute and strainer-pot housing
• Clear pump lid
• Lid locking ring
• Lid O-ring
• Drain-plug components
• Mounting hardware

Package contents may vary according to the current Pentair production configuration.

Common Reasons for Replacement

Replacement may be required when the pump has:

• A cracked or leaking strainer housing
• Freeze damage
• Air entering around the pump body
• Difficulty maintaining prime
• A damaged lid sealing surface
• Broken mounting points
• Warping caused by excessive plumbing stress
• Damaged drain-plug threads
• Visible deterioration of the volute

This assembly will not correct problems caused by a failed motor, drive, impeller, diffuser, seal plate, shaft seal, or blocked plumbing.

Installation Information

Turn off power at the breaker and relieve all pressure from the filtration system before servicing the pump. Close the plumbing valves, drain the pump, and disconnect the necessary plumbing connections.

Remove the motor and hydraulic assembly from the existing volute. Inspect the diffuser, impeller, seal plate, shaft seal, and related O-rings before transferring reusable components. Replace worn sealing parts during installation to help prevent leaks.

After reassembly, fill the strainer pot with water, secure the lid, open the plumbing valves, and restart the pump. Check all connections for water leaks and suction-side air leaks. Never operate the pump dry.

Professional installation is recommended.

Confirm Before Ordering

Please verify:

• Your required part number is 356175Z
• Your pump is an IntelliFlo3 VSF or compatible IntelliPro3 VSF
• You need the volute housing and hardware assembly
• Your existing motor, drive, and internal hydraulic components are reusable
• The damage is not limited to an individual lid, O-ring, or drain plug
• Your pump model and serial number match the applicable parts diagram

Warranty Information

This genuine Pentair replacement assembly is covered by Pentair’s applicable limited manufacturer warranty against qualifying defects in materials and workmanship. Damage caused by freezing, improper plumbing, excessive pressure, dry operation, chemical exposure, impact, or incorrect installation may not be covered.

Customer Q&A

Q: Does this assembly include the motor?
A: No. The motor and variable-speed drive are not included.

Q: Is the pump lid included?
A: Yes. The assembly includes the lid, locking ring, and lid-sealing components.

Q: Does it include the impeller and diffuser?
A: No. These internal hydraulic parts must be reused or purchased separately.

Q: Can this repair a cracked pump housing?
A: Yes. Replacing a cracked or freeze-damaged housing is one of the primary uses for this assembly.

Q: Does this fit older IntelliFlo pumps?
A: It is designed for the IntelliFlo3 platform and should not be assumed compatible with earlier IntelliFlo pump generations.