Aladdin O-321 Chlorinator Lid Gasket CLX200K

Key Fit

• Aladdin O-321-0 Gasket (Bagged) – OEM-quality replacement gasket manufactured to Aladdin specifications for pool chlorinator sealing

• Hayward Chlorinator Compatibility – Fits Hayward CL200, CL220, CL100, and CL110 inline and offline chlorinators

• OEM Cross-Reference – Direct replacement for Hayward part number CLX200K chlorinator lid gasket

• Correct Seal Profile – Sized to properly seat in the chlorinator lid groove for consistent, leak-free sealing

• Chemical-Resistant Material – Designed to withstand continuous chlorine exposure and pool operating conditions

• Direct Replacement Fit – Installs easily during routine maintenance or leak repair with no modification required

The Aladdin O-321 Gasket (O-321-0) is a precision-molded replacement gasket designed to restore a proper seal on Hayward in-line and off-line chlorinators. This gasket is most commonly used as the lid seal on popular Hayward chlorinator models, where maintaining a tight, leak-free closure is essential for safe and consistent chlorine delivery.

Over time, chlorinator gaskets can become flattened, brittle, or chemically degraded due to constant exposure to chlorine and pressure. When this happens, leaks around the lid can develop, leading to reduced efficiency, chemical loss, and potential equipment damage. Replacing the gasket with a correctly sized, chemical-resistant seal like the Aladdin O-321 ensures the chlorinator operates as designed.

This gasket is bagged for protection and easy identification and is manufactured to meet or exceed OEM fit standards.

Why This Gasket Matters

A chlorinator lid gasket plays a critical role in both performance and safety. Even minor gasket wear can cause chlorine leaks, air intrusion, or pressure loss.

Why this matters:

• Prevents leaks around chlorinator lids

• Maintains proper internal pressure

• Ensures consistent chlorine feed into the pool system

• Reduces chemical waste and corrosion risk

• Protects surrounding equipment and plumbing

Replacing a worn gasket is a low-cost maintenance step that helps prevent far more expensive issues down the line.

Compatible Hayward Chlorinators

The Aladdin O-321 gasket is commonly used as a replacement for the Hayward CLX200K lid gasket and fits several Hayward chlorinator models, including:

• Hayward CL200

• Hayward CL220

• Hayward CL100

• Hayward CL110

Always verify your model and gasket size before installation to ensure proper fit.

Durable, Chemical-Resistant Construction

This gasket is manufactured from high-quality elastomer materials designed to withstand constant exposure to chlorine, heat, and pressure. The material resists swelling, cracking, and premature breakdown, helping maintain a long-lasting seal even in demanding pool environments.

Proper installation ensures even compression around the lid for consistent sealing without overtightening.

Product Specifications

Installation Notes

Before installing the new gasket:

• Power off the pool system

• Relieve pressure from the chlorinator

• Clean the gasket groove and lid surface

• Seat the gasket evenly without stretching

• Tighten the lid evenly to avoid pinching

Do not use petroleum-based lubricants unless explicitly approved for chlorinator gaskets.

Buy with Confidence from Benchmark Pool Supply

Benchmark Pool Supply stocks trusted replacement parts from Aladdin Equipment Company to help keep your pool equipment operating safely and efficiently. The Aladdin O-321 gasket is a reliable, cost-effective solution for restoring proper sealing in Hayward chlorinators.

Ideal for routine maintenance, service calls, or keeping spares on hand for quick repairs.