Swimables SW-21-131 WhisperFlo IntelliFlo Drain Plug with O-Ring

Key Fit

• Pump Pot Drain Plug with O-Ring (SW-21-131) – Seals the pump pot drain port to prevent water leaks and air intrusion

• WhisperFlo® & IntelliFlo® Style Fit – Designed for pumps that use WhisperFlo / IntelliFlo–style drain plugs

• Includes Matching O-Ring – Comes with the correct O-ring to ensure a proper, leak-free seal

• Prevents Loss of Prime – Stops air from entering the pump, which can cause priming issues and poor performance

• Simple Hand-Tight Installation – Installs easily with hand tightening; no tools required

• Replace Both Plug & O-Ring Together – Ensures proper sealing and reduces the risk of recurring leaks

• Small Part, Critical Function – A leaking drain plug can significantly affect pump efficiency and reliability

The Swimables SW-21-131 Pump Pot Drain Plug with O-Ring is a replacement drain plug designed for WhisperFlo® and IntelliFlo®-style pool pumps. This plug seals the pump strainer housing drain port, preventing water leaks and allowing the pump to maintain proper prime and operating pressure.

Drain plugs are commonly removed during winterization, pump servicing, or system draining. Over time, plugs and O-rings can crack, deform, or lose elasticity, resulting in slow leaks, air intrusion, or difficulty maintaining prime. Replacing the drain plug and O-ring together restores a tight, leak-free seal at the pump housing.

This Swimables replacement is engineered for proper thread fit and sealing performance in compatible pump models.

Why the Drain Plug Matters

A small leak can create major pump problems.

Why this matters:

• Seals the pump pot to prevent water leaks

• Prevents air from entering the pump system

• Helps maintain proper pump prime

• Protects pump performance and efficiency

• Reduces risk of pump damage from running dry

A worn drain plug or O-ring should be replaced immediately to avoid air leaks and water loss.

Designed for WhisperFlo & IntelliFlo-Style Pumps

The SW-21-131 drain plug is designed for use with WhisperFlo® and IntelliFlo®-style pool pumps. Proper thread sizing and O-ring fit are critical for achieving a reliable seal at the pump housing drain port.

Always verify pump model compatibility before installation.

Durable Construction with Included O-Ring

This drain plug is manufactured from durable, pool-safe materials designed to withstand repeated installation, water exposure, and seasonal service. The included O-ring provides a secure seal without overtightening, helping protect the pump housing threads.

Replacing the plug and O-ring together ensures optimal sealing and long-term reliability.

Installation & Service Notes

For best results:

• Turn off the pump and relieve system pressure

• Remove the old drain plug from the pump pot

• Inspect and clean the drain port threads

• Install the new plug with the included O-ring

• Hand-tighten until snug—do not overtighten

• Restart the system and check for leaks

No tools are typically required for installation.

Product Specifications

Buy with Confidence from Benchmark Pool Supply

When you purchase the Swimables SW-21-131 Drain Plug with O-Ring from Benchmark Pool Supply, you’re getting a dependable replacement part trusted by pool professionals. We stock essential pump components to help keep your circulation system sealed, efficient, and reliable.

Benchmark Pool Supply is your trusted source for pool pump parts and accessories.