BASC150041 | ‘O’ Ring for Black Cell Cap

Essential Seal for Clearwater C140S Salt Cell

This BASC150041 O-Ring provides a watertight seal for the black cell cap on Clearwater Salt Chlorinator C140S models. This small but critical component prevents water leaks and ensures your salt chlorination system operates efficiently and safely.

What is This O-Ring For?

This replacement O-ring seals the connection between the salt cell cap and the cell housing in your Clearwater C140S salt chlorinator. The O-ring creates a compression seal that prevents water from escaping the pressurized salt cell chamber during operation. Without a proper seal, water can leak, air can enter the system, and chlorine production efficiency drops significantly.

Why O-Rings Need Replacement

O-rings are wear items that deteriorate over time due to:

• Chemical exposure from chlorine and spa chemicals
• Heat cycling from water temperature changes
• UV exposure if mounted externally
• Compression stress from repeated tightening
• Age-related rubber degradation

Signs You Need a New O-Ring

• Visible water dripping from cell cap connection
• Moisture around the cell cap area
• Air bubbles in the salt cell during operation
• Reduced chlorine production efficiency
• O-ring appears cracked, flattened, or brittle
• Previous O-ring fell apart during cell cleaning

Key Features

Exact Fit Design
Manufactured to precise dimensions for the Clearwater C140S black cell cap, ensuring proper compression and reliable sealing.

Chemical Resistant Material
Constructed from materials that withstand exposure to chlorine, salt, and spa chemicals without rapid degradation.

Affordable Maintenance
At a modest cost, this O-ring prevents expensive water damage and maintains system efficiency.

When to Replace

During Cell Cleaning:
The ideal time to replace the O-ring is when removing the salt cell for routine cleaning, typically every 3-6 months depending on usage.

At First Sign of Leaking:
Don’t wait if you notice leaks. Replace immediately to prevent water damage and maintain proper system operation.

Preventive Replacement:
Consider replacing annually as preventive maintenance, even if the existing O-ring appears intact.

Installation Guide

1. Power Down: Turn off power to the salt chlorinator system
2. Relieve Pressure: Follow manufacturer procedures to depressurize the system
3. Remove Cap: Unscrew the black cell cap from the salt cell housing
4. Clean Surfaces: Remove old O-ring and clean both the cap groove and mating surfaces
5. Lubricate: Apply a thin coat of silicone-based lubricant to the new O-ring
6. Install O-Ring: Seat the new O-ring evenly in the cap groove
7. Reassemble: Thread the cap back onto the housing and tighten to manufacturer specifications
8. Test: Restore power and check for leaks

Important Installation Tips

Don’t Over-Tighten:
Excessive tightening can damage the O-ring and won’t improve the seal. Follow manufacturer torque specifications.

Use Proper Lubricant:
Use only silicone-based O-ring lubricant. Petroleum-based products will damage the O-ring material.

Inspect Before Installing:
Check the new O-ring for any defects, nicks, or imperfections before installation.

Clean Mating Surfaces:
Remove any scale, debris, or old O-ring material from sealing surfaces for best results.

Product Specifications

Specification	Details
Product Type	O-Ring Seal
Part Number	BASC150041
Compatible Model	Clearwater Salt Chlorinator C140S
Application	Black Cell Cap Seal
Category	Clearwater Salt Chlorinator Components
Function	Watertight Seal for Salt Cell

Maintenance Recommendations

Regular Inspection:
Check the O-ring condition every time you clean your salt cell, typically every 3-6 months.

Keep Spares:
Stock an extra O-ring in your spa maintenance kit to avoid downtime if replacement is needed unexpectedly.

Gentle Handling:
When removing the cell cap, handle carefully to avoid damaging or losing the O-ring.

Why This Small Part Matters

Though inexpensive, a failed O-ring can cause significant problems:

• Water leaks leading to equipment damage
• Reduced chlorine generation efficiency
• Air introduction affecting system performance
• Potential for scalding if hot water escapes under pressure
• Damage to surrounding equipment from water exposure

Regular O-ring replacement is simple preventive maintenance that protects your investment in the salt chlorination system.

Compatible System

This O-ring is specifically designed for the Clearwater Salt Chlorinator C140S model. The C140S is a popular salt chlorination system for hot tubs and spas, providing automatic chlorine generation without the need for traditional chemical dosing.

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Note: Always verify part compatibility with your specific model before ordering. When working with pressurized plumbing systems, ensure power is disconnected and pressure is relieved before disassembly. Keep replacement O-rings away from petroleum-based products which can cause deterioration.