Pentair Lens Gasket 4” – Replacement Part 79108500Z
Pentair Lens Gasket 4” 79108500Z for Pool and Spa Lights
Ensure a Leak-Free Seal for Your Pentair Light Fixture
Keep your pool lighting system watertight and reliable with the Pentair Lens Gasket 4” 79108500Z. This genuine Pentair replacement gasket forms a perfect seal between your light lens and housing, preventing water intrusion and protecting the electrical components inside your pool light.
Whether you’re maintaining a Pentair Amerlite, SpaBrite, or other compatible light model, replacing the lens gasket is an essential step anytime the fixture is opened. This simple yet vital part ensures that your light operates safely, efficiently, and remains free of moisture damage.
Over time, pool chemicals, heat, and pressure changes can cause your old gasket to shrink, crack, or deform. Installing a new 79108500Z gasket helps restore the factory-tight seal and ensures long-lasting performance from your Pentair lighting system.
Why Choose the Genuine Pentair 79108500Z Lens Gasket
Designed for a Perfect Fit
The Pentair 79108500Z is an exact-fit OEM replacement part engineered to meet the precise specifications of Pentair lighting systems. The 4-inch diameter gasket fits snugly into place and maintains even pressure across the lens, ensuring a watertight seal every time.
Superior Material Quality
Constructed from high-grade, chemical-resistant rubber, this gasket withstands exposure to chlorine, bromine, and ozone without breaking down. It’s specifically formulated to perform in underwater environments, where durability and flexibility are critical.
Prevents Moisture Damage
A compromised gasket can allow even a small amount of water to enter the light housing, leading to corrosion, electrical failure, or shattered lenses. Replacing the gasket during any bulb or lens maintenance prevents these costly issues and keeps your pool light system safe.
Easy Installation
The lens gasket installs quickly and easily—no tools required. Simply remove the light fixture from the niche, open the housing, clean the lens edge, and replace the old gasket with your new 79108500Z.
Compatible Pentair Light Models
The Pentair 79108500Z Lens Gasket fits a wide range of 4” Pentair pool and spa light fixtures, including:
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Pentair Amerlite Pool Lights (4” lens models)
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Pentair SpaBrite and AquaLight Spa Lights
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Compatible Pentair Stainless Steel Niche Lights
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Select Pentair IntelliBrite models with standard 4” housings
Always confirm your fixture’s model number from the product label or user manual before ordering to ensure compatibility.
When to Replace Your Pool Light Lens Gasket
Your gasket should be replaced anytime the light fixture is opened—especially when:
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Changing a bulb or lens
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Servicing internal electrical components
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Replacing a cracked or cloudy lens
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Observing condensation inside the light
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Reassembling a unit that’s been stored or unused for an extended period
Regularly replacing the gasket extends the lifespan of your light and ensures consistent illumination in your pool or spa.
Installation Guide: Step-by-Step
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Turn Off Power: Always disconnect power at the breaker before removing your pool light.
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Remove Light Fixture: Loosen the screw securing the light to its niche and pull the fixture out of the water.
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Disassemble the Housing: Place the fixture on a towel, remove the clamp ring, and separate the lens.
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Clean Surfaces: Wipe away any debris, oils, or residue from the lens and housing surfaces.
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Install the New Gasket: Position the new 79108500Z gasket evenly around the lens. Ensure it’s not twisted or stretched.
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Reassemble: Reattach the clamp ring evenly to create a uniform seal.
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Test for Leaks: Submerge the light before installation and check for air bubbles that may indicate a poor seal.
Technical Specifications
| Specification | Detail |
|---|---|
| Manufacturer | Pentair Pool Products |
| Part Number | 79108500Z |
| Type | Lens Gasket (4”) |
| Material | Chemical-Resistant Rubber |
| Color | Black |
| Compatibility | Pentair Amerlite, SpaBrite, AquaLight, and similar 4” fixtures |
| Purpose | Creates a watertight seal between the lens and housing |
Recommended Complementary Parts
Keep your Pentair lighting system running at peak performance with these related parts:
Replacing these components together ensures your pool light remains sealed, clear, and reliable for years to come.
Pro Maintenance Tip
Each time you replace a bulb or service your pool light, inspect the lens gasket closely. Even if it appears fine, rubber materials can lose elasticity over time. A few minutes of preventative maintenance can save you from replacing an entire light due to moisture damage or internal corrosion.
Buy with Confidence from Benchmark Pool Supply
At Benchmark Pool Supply, we carry only authentic Pentair replacement parts, never generic substitutes. Each component is sourced directly from certified distributors to ensure quality and compatibility with your Pentair system.
When you buy from us, you get:
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Fast, nationwide shipping
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Expert technical support
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A full selection of Pentair pool and spa replacement parts
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Competitive pricing and professional guidance
Benchmark Pool Supply helps pool owners and service professionals maintain their systems with confidence—because we know pool care is about safety, reliability, and quality.
Frequently Asked Questions
What does the Pentair 79108500Z gasket do?
The gasket creates a watertight seal between the lens and light housing, keeping water out and preventing electrical damage.
How often should I replace my Pentair lens gasket?
Replace the gasket each time the light housing is opened or whenever signs of cracking, flattening, or wear appear.
Can I reuse my old lens gasket?
It’s not recommended. Once compressed and exposed to heat or chlorine, old gaskets lose elasticity and can fail to seal properly.
Will this fit my Pentair IntelliBrite 5G?
Yes, if your IntelliBrite uses the standard 4-inch lens housing. Always verify your fixture’s part number before ordering.
Is this an OEM Pentair part?
Yes. The 79108500Z gasket is a genuine Pentair-manufactured part, ensuring perfect fit and long-term reliability.
