Product Overview

The Swimables WhisperFlo / IntelliFlo Style Pump Lid with O-Ring | SW-21-151 is a high-quality aftermarket replacement pump lid designed for compatible Pentair WhisperFlo and IntelliFlo-style pool pumps.

This clear replacement lid allows pool owners and service professionals to inspect the pump basket without removing the lid, making routine maintenance faster and easier. The included O-ring helps create a tight, leak-resistant seal to support proper pump prime, circulation, and overall equipment performance.

The SW-21-151 is designed to replace Pentair 357151 / 357151Z-style pump lids and is commonly used when the original lid becomes cracked, cloudy, warped, difficult to seal, or damaged from normal pool equipment wear.

Ideal For

• Pentair WhisperFlo-style pumps
• Pentair IntelliFlo-style pumps
• Compatible pumps using 357151 / 357151Z-style lids
• Replacing cracked or leaking pump lids
• Replacing cloudy lids that make basket inspection difficult
• Restoring a tight pump lid seal
• Preventing air leaks that may cause loss of prime
• Pool service repairs and equipment pad maintenance
• Keeping spare pump lids on service trucks

Key Features

• Clear pump lid design — allows quick visual inspection of the pump basket without removing the lid.
• Includes O-ring — comes with the sealing O-ring needed for a secure fit.
• Replaces Pentair 357151 / 357151Z-style lids — aftermarket replacement for compatible WhisperFlo and IntelliFlo-style applications.
• Helps maintain pump prime — supports a tight seal to reduce air intrusion.
• Leak-resistant fit — helps prevent water seepage around the pump lid connection.
• Durable pool-grade construction — built for outdoor pool equipment environments.
• Easy maintenance replacement — ideal for quick lid replacement during regular service.
• Cost-effective repair part — helps restore pump performance without replacing the full pump.
• Aftermarket Swimables quality — designed as a reliable replacement for common pump lid repairs.

Benefits

A worn or damaged pump lid can lead to air leaks, water leaks, poor priming, reduced suction, and inconsistent circulation. The Swimables SW-21-151 helps restore a clean, secure seal at the pump strainer pot while making the basket easier to monitor during routine pool care.

Because the lid is transparent, customers can quickly see when leaves, debris, or buildup are inside the pump basket. This helps prevent unnecessary pump strain and makes regular maintenance more convenient.

The included O-ring also helps avoid reusing a flattened, brittle, stretched, or worn seal, giving the replacement a better chance of sealing properly from the start.

Specifications

Included Components

• 1 × Swimables SW-21-151 clear pump lid
• 1 × pump lid O-ring

Installation Notes

Turn off the pool pump before removing the old lid. Relieve system pressure and make sure the pump is not running.

Remove the existing lid and old O-ring, then inspect the pump strainer housing for cracks, debris, or damage around the sealing surface. Place the new O-ring properly on the replacement lid or sealing groove as required by the pump model.

For best results, apply a small amount of pool-safe silicone lubricant to the O-ring before installation. Install the lid by hand and tighten until snug. Do not overtighten, as excessive force may damage the lid, O-ring, or pump housing.

After restarting the pump, check around the lid for air bubbles, water leaks, or signs of poor sealing.

Customer-Facing Q&A

Q: What does the Swimables SW-21-151 replace?
A: It replaces Pentair 357151 / 357151Z-style pump lids for compatible WhisperFlo and IntelliFlo-style pumps.

Q: Does this include the O-ring?
A: Yes. This listing includes one clear pump lid and one O-ring.

Q: Is this lid clear?
A: Yes. The lid is transparent so the pump basket can be checked without removing the lid.

Q: Will this fit IntelliFlo pumps?
A: It fits compatible IntelliFlo-style pumps that use the 357151 / 357151Z-style lid. It is not intended for IntelliFlo3-style pump lids.

Q: Will this fit WhisperFlo pumps?
A: Yes. It is designed for compatible WhisperFlo-style pump applications.

Q: Can this help fix pump priming problems?
A: It can help if the priming problem is caused by a cracked lid, worn O-ring, or air leak around the pump lid.

Q: Is this an OEM Pentair part?
A: No. This is a Swimables aftermarket replacement part designed to fit compatible Pentair-style pump applications.

Q: Should I reuse my old O-ring?
A: No. Use the new O-ring included with the lid for the best seal.

Q: Do I need tools to install it?
A: No. In most cases, the lid should be installed and tightened by hand.

Q: How do I know my old lid needs replacement?
A: Replace the lid if it is cracked, cloudy, warped, leaking, hard to tighten, or causing air bubbles in the pump basket.