TL;DR: Installing Pentair 79100200 medium blue tempered lens cover and face ring takes 30-45 minutes. Turn off power at breaker, remove light from niche, remove old lens and face ring, install new lens with gasket, install new face ring, reinstall light, test operation. Kit costs $60-$120 replacing cracked lens or corroded face ring. Proper installation ensures watertight light operation and attractive appearance. DIY installation saves $100-$200 professional cost.
SEO Summary: Complete 2026 guide to installing Pentair 79100200 medium blue tempered lens cover and face ring covering tools required, power shutoff, light removal, old lens removal, old face ring removal, new lens installation with gasket, new face ring installation, light reinstallation, leak testing, troubleshooting, and maintenance for watertight attractive pool light.
Related Categories
Table of Contents
Product Overview and Function
Pentair 79100200 is medium blue tempered glass lens cover and stainless steel face ring kit for pool lights. Lens provides colored light effect while protecting light internals. Face ring provides finished appearance around light. Kit costs $60-$120 replacing cracked lens or corroded face ring.
Blue lens creates attractive underwater lighting effect. Tempered glass withstands water pressure and temperature changes. Stainless steel face ring resists corrosion. Quality components ensure long service life.
The pool parts and accessories collection offers pool light lenses and face rings.
Tools and Materials Required
Required tools: screwdriver (Phillips), towels, clean rags. Required materials: Pentair 79100200 kit (lens, gasket, face ring), silicone lubricant. Optional: silicone sealant for face ring installation.
Safety Procedures
Turn off power to pool light at circuit breaker. Verify power is off by attempting to turn on light. Never work on pool light with power on. Electrical shock in water is fatal. Power shutoff is critical safety step.
Wait 5 minutes after turning off power before removing light. Capacitors in light may hold charge. Waiting allows capacitor discharge. Immediate work after power off risks shock from stored charge.
Work on deck not in pool. Remove light from niche and bring to deck for service. Working in water creates shock hazard. Deck work is safer and more convenient.
The pool covers collection offers covers for pool protection during maintenance.
Removing Light and Old Components
Remove light mounting screw at top of light fixture. Screw secures light to niche. Turn counterclockwise to loosen. Set screw aside safely. Missing screw requires replacement.
Pull light fixture out of niche carefully. Light has 3-6 feet cord allowing removal to deck. Avoid pulling on cord. Support light housing during removal. Set light on towel on deck.
Remove screws securing lens to housing. Count screws ensuring all are removed. Typical light has 6-8 screws. Missing screw prevents lens removal. Set screws aside in container.
Carefully remove lens from housing. Lens may stick from gasket seal. Gentle prying releases stuck lens. Avoid damaging lens or housing. Set old lens aside for disposal if cracked.
Remove old gasket from housing groove. Gasket may be stuck or deteriorated. Remove all old gasket material. Clean groove thoroughly. Proper surface preparation ensures new gasket seals properly.
Remove old face ring from niche if replacing. Ring may be clipped, screwed, or friction fit. Gently pry ring from niche if stuck. Clean niche opening removing corrosion and deposits.
The pool chemicals collection offers water treatment products.
The Taylor K-1000 Test Kit monitors water chemistry.
Installing New Lens and Face Ring
Apply thin coat silicone lubricant to new gasket. Lubrication helps gasket seat in groove and improves seal. Use pool-safe silicone lubricant. Excessive lubricant is unnecessary.
Install new gasket in housing groove. Press gasket evenly into groove around entire perimeter. Gasket should sit flat without twists or gaps. Proper gasket installation is critical for watertight seal.
Position new blue lens on housing aligning with screw holes. Press lens firmly onto gasket. Install screws tightening evenly in star pattern. Even tightening ensures uniform gasket compression and watertight seal. Tighten until snug avoiding overtightening.
Install new face ring on niche if replacing. Apply thin bead silicone sealant to back of ring optional. Position ring evenly around niche opening. Press ring firmly into position. Secure ring per manufacturer instructions.
Wipe away excess sealant if used. Smooth sealant bead around ring perimeter. Clean appearance indicates professional installation.
Testing and Finishing
Inspect assembled light for proper lens seating. Lens should be flush with housing around entire perimeter. Gaps indicate improper assembly requiring correction. Proper assembly ensures watertight seal.
Reinstall light in niche. Guide light carefully into niche avoiding cord damage. Position light flush in niche. Install mounting screw securing light. Tighten screw securely.
Turn on power and verify light operates. Light should illuminate with blue color. Normal operation confirms electrical components are dry and functional. Light failure indicates water damage requiring repair.
Monitor light for 24-48 hours checking for water entry. Inspect light housing through lens for water accumulation. No water confirms successful seal. Water presence indicates leak requiring lens reinstallation.
Inspect face ring from pool deck verifying attractive appearance. Ring should enhance pool aesthetics. Professional appearance confirms successful installation.
The pool cleaners collection provides equipment for pool maintenance.
Troubleshooting Common Problems
Water in light housing: indicates improper gasket installation or damaged lens. Remove light and inspect gasket seating. Reinstall gasket ensuring proper seating. Cracked lens requires replacement.
Lens won't seal properly: indicates wrong gasket size, twisted gasket, or damaged lens. Verify gasket is correct part. Check gasket for twists. Inspect lens for cracks. Replace damaged components.
Face ring won't stay in place: indicates improper installation or wrong ring size. Verify ring is correct part. Use sealant or clips securing ring. Proper securing prevents ring movement.
Light doesn't work after installation: indicates water damage to electrical components. Drain water and allow complete drying. If light still doesn't work, electrical components require replacement.
Lens and Face Ring Maintenance
Clean lens monthly removing calcium deposits and algae. Use soft cloth and mild cleaner. Avoid abrasive cleaners damaging glass. Regular cleaning maintains light brightness and appearance.
Inspect gasket annually for wear or damage. Cracked or hardened gasket requires replacement. Annual inspection identifies problems before leaks develop. Preventive gasket replacement prevents water damage.
Clean face ring monthly removing deposits. Use soft cloth and stainless steel cleaner. Regular cleaning maintains attractive appearance. Polish ring annually restoring shine.
Replace lens if cracked or severely scratched. Cracked lens leaks water damaging light. Scratched lens reduces light output. Lens replacement restores proper function and appearance.
Conclusion and Key Takeaways
Installing Pentair 79100200 medium blue tempered lens cover and face ring takes 30-45 minutes. Kit costs $60-$120 with DIY installation saving $100-$200 professional cost. Proper installation ensures watertight light operation and attractive appearance.
Kit includes blue tempered glass lens, gasket, and stainless steel face ring. Components replace cracked lens or corroded face ring. Quality components ensure long service life and attractive appearance.
Required tools include screwdriver and towels. Required materials include kit and silicone lubricant. Basic tools make this accessible DIY project for capable pool owners.
Safety procedures include turning off power at breaker, waiting 5 minutes before starting, and working on deck not in pool. Electrical safety is critical for pool light work. Never work on energized pool light.
Removal requires removing light from niche, removing lens screws, removing lens, removing old gasket, and removing old face ring. Proper surface preparation ensures new components install properly.
Installation requires lubricating and installing new gasket, installing new lens with even screw tightening, and installing new face ring. Proper installation ensures watertight seal and attractive appearance.
Testing includes inspecting assembly, reinstalling light, verifying operation, and monitoring for water entry. No water accumulation confirms successful seal. Professional appearance confirms successful installation.
Troubleshooting addresses water in housing, lens won't seal, face ring won't stay, and light doesn't work. Most problems result from improper installation. Systematic troubleshooting resolves most issues.
Maintenance includes monthly cleaning, annual gasket inspection, and lens replacement if damaged. Simple maintenance maintains light function and appearance.
The Qualco Pool Closing Chemical Kit for 15,000 Gallons provides winterization chemistry.
The Qualco Pool Closing Chemical Kit for 30,000 Gallons covers larger pools.
The GLB Algimycin Winter Algaecide provides winter protection.
The Swimline 4 x 15 Air Pillow protects above ground pools.
The SimPoolTech Winterizing Skimmer Plug provides freeze protection.
Key Takeaways:
- Kit costs $60-$120, DIY saves $100-$200
- Installation takes 30-45 minutes
- Turn off power at breaker before starting
- Wait 5 minutes after power off before starting
- Work on deck not in pool
- Remove light mounting screw
- Pull light from niche to deck
- Remove lens screws and lens
- Remove old gasket completely
- Lubricate new gasket with silicone
- Install gasket evenly in groove
- Tighten lens screws evenly in star pattern
- Install face ring with optional sealant
- Monitor light for 24-48 hours after installation
- Clean lens monthly maintaining brightness
- Replace lens if cracked
Explore our complete pool parts selection for pool light lenses and face rings.
