Product Overview

Restore a proper seal to your pump lid with the Pentair 356189Z Strainer Cover O-Ring, designed for compatible IntelliFlo3 and IntelliPro3 VSF pool pumps. This genuine replacement O-ring sits between the strainer lid and pump housing, helping maintain suction integrity and proper pump operation.

A worn, flattened, or cracked O-ring can allow air to enter the system or cause water seepage around the lid. Replacing it helps maintain prime, supports consistent flow, and keeps your pump operating efficiently.

This listing includes one replacement O-ring only. The strainer lid, pump, and other components are not included.

Key Features

Genuine Pentair replacement part

Direct replacement for part number 356189Z

Designed for IntelliFlo3 and IntelliPro3 VSF pump models

Helps maintain proper lid seal and suction performance

Supports consistent pump priming and operation

Simple drop-in replacement for routine maintenance

Sold individually

Benefits

Helps prevent air leaks in the suction system

Supports proper pump priming and circulation

Reduces risk of water leakage around the lid

Restores sealing performance of worn or damaged O-rings

Extends the usability of the existing pump assembly

Quick and cost-effective maintenance solution

Specifications

Pentair’s replacement-parts guide identifies 356189Z as the strainer cover O-ring used on both IntelliFlo3 and IntelliPro3 VSF pump models.
UPC data is based on distributor product records for this part number.

Warranty & Compatibility

Compatibility

Compatible with:

• Pentair IntelliFlo3 VSF (1.5 HP and 3.0 HP)
• Pentair IntelliPro3 VSF (1.5 HP and 3.0 HP)

Compatibility depends on the exact pump model and parts diagram. Always confirm that part number 356189Z matches the existing O-ring before ordering.

When to Replace the O-Ring

Replace the O-ring if you notice:

• Cracks, brittleness, or hardening
• Flattening or loss of shape
• Stretching or improper fit
• Air entering the system (loss of prime)
• Water leaking around the pump lid
• Difficulty maintaining a tight lid seal

Installation and Care

1. Turn off power at the breaker and stop the pump
2. Relieve system pressure before opening the lid
3. Remove the strainer cover
4. Take out the old O-ring and clean the sealing groove
5. Inspect the lid and sealing surface for debris or damage
6. Install the new O-ring evenly without twisting or pinching
7. Reinstall the lid securely before restarting the pump

For best results, keep the sealing surfaces clean and inspect the O-ring regularly during routine maintenance. Pentair recommends proper shutdown and pressure relief before servicing pump components.

Customer-Facing Q&A

Q: Is this the strainer lid?
A: No. This listing is for the replacement O-ring only.

Q: Will this fit older IntelliFlo pumps?
A: Not necessarily. This O-ring is specifically listed for IntelliFlo3 and IntelliPro3 VSF models. Verify the part number before purchasing.

Q: What does the O-ring do?
A: It creates a seal between the pump lid and housing, helping maintain suction and prevent air or water leaks.

Q: How often should it be replaced?
A: Replace the O-ring when it shows signs of wear or no longer seals properly. Routine inspection is recommended during pump maintenance.