TL;DR: Replacing Pentair 670044 cord seal grommet kit takes 20-30 minutes. Turn off power at breaker, remove light from niche, remove old grommet, install new grommet, reinstall light, test for leaks. Kit costs $15-$30 replacing worn grommet that allows water entry into light niche. Proper installation ensures watertight cord seal preventing water intrusion. DIY installation saves $75-$150 service call cost.
SEO Summary: Complete 2026 guide to replacing Pentair 670044 cord seal grommet kit assembly covering tools required, power shutoff, light removal, old grommet removal, new grommet installation, proper seating, light reinstallation, leak testing, troubleshooting, and maintenance for watertight pool light cord seal.
Related Categories
Table of Contents
Cord Seal Grommet Overview and Function
Pentair 670044 is cord seal grommet kit for pool light niche. Grommet seals around light cord where cord enters niche preventing water from entering niche through cord opening. Kit costs $15-$30 providing essential water protection. Worn grommet allows water into niche creating electrical hazard and corrosion.
Grommet is rubber seal that compresses around cord creating watertight seal. Grommet degrades from UV exposure, chemicals, and age. Typical grommet life is 5-7 years. Regular replacement prevents water intrusion and electrical problems.
The pool parts and accessories collection offers pool light parts and cord seal grommets.
Required Tools and Materials
Required tools: screwdriver, towels, clean rags. Required materials: Pentair 670044 cord seal grommet kit, silicone lubricant. Optional: flashlight for inspecting niche.
Electrical 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 Grommet
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.
Inspect niche cord opening for old grommet. Grommet is located where cord enters niche. Grommet may be deteriorated or missing. Identify grommet location before attempting removal.
Remove old grommet from niche cord opening. Grommet may be stuck or deteriorated. Use fingernail or small screwdriver prying grommet from opening. Remove all old grommet material. Partial grommet removal prevents proper new grommet seating.
Clean cord opening thoroughly removing debris and old grommet material. Use clean rag wiping opening dry. Clean opening ensures proper new grommet seal. Inspect opening for damage requiring repair.
The pool chemicals collection offers water treatment products.
The Taylor K-1000 Test Kit monitors water chemistry.
Installing New Cord Seal Grommet
Inspect new grommet verifying no damage. Check for tears or deformities. Damaged grommet requires replacement before installation. Quality check ensures proper seal.
Apply thin coat silicone lubricant to new grommet. Lubrication helps grommet slide into opening and improves seal. Use pool-safe silicone lubricant. Excessive lubricant is unnecessary.
Thread light cord through new grommet. Grommet slides onto cord. Position grommet on cord near light housing. Proper positioning allows grommet installation in niche opening.
Install grommet in niche cord opening. Press grommet firmly into opening. Grommet should seat completely in opening without gaps. Proper seating ensures watertight seal around cord.
Verify grommet is properly seated. Check entire grommet perimeter ensuring even seating. Uneven grommet causes leaks. Proper seating ensures reliable seal preventing water intrusion.
Leak Testing and Light Reinstallation
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 normally. Normal operation confirms electrical components are dry and functional. Light failure indicates water damage requiring repair.
Monitor niche for 24-48 hours checking for water entry. Inspect niche through light opening for water accumulation. No water confirms successful grommet seal. Water presence indicates leak requiring grommet reinstallation.
Check cord opening from outside niche if accessible. Look for water seeping around cord. No water confirms watertight seal. Water seepage indicates improper grommet installation.
The pool cleaners collection provides equipment for pool maintenance.
Common Problems and Solutions
Water enters niche: indicates improper grommet installation or damaged grommet. Remove light and inspect grommet seating. Reinstall grommet ensuring proper seating. Damaged grommet requires replacement.
Grommet won't stay in place: indicates wrong grommet size or damaged opening. Verify grommet is correct part number. Inspect opening for damage. Wrong grommet or damaged opening requires correction.
Cord difficult to pull through grommet: indicates grommet too small or cord too large. Verify grommet and cord compatibility. Use lubricant helping cord slide through. Incompatible components require correct replacement.
Light doesn't work after replacement: indicates water damage to electrical components. Water in niche damages connections or light. Drain water and allow complete drying. If light still doesn't work, electrical components require replacement.
Preventive Maintenance Tips
Inspect grommet annually for wear or damage. Remove light and check grommet condition. Cracked or hardened grommet requires replacement. Annual inspection identifies problems before leaks develop.
Replace grommet every 5-7 years preventively. Grommet degrades from UV exposure and chemicals. Preventive replacement prevents water leaks and electrical damage. Grommet replacement is inexpensive maintenance.
Check niche for water during routine light service. Water in niche indicates grommet failure. Early detection allows prompt grommet replacement. Regular monitoring prevents electrical damage.
Lubricate new grommet during installation. Lubrication improves seal and extends grommet life. Use pool-safe silicone lubricant. Proper lubrication is simple effective maintenance.
Conclusion and Key Takeaways
Replacing Pentair 670044 cord seal grommet kit takes 20-30 minutes. Kit costs $15-$30 with DIY installation saving $75-$150 service call cost. Proper installation ensures watertight cord seal preventing water intrusion into light niche.
Cord seal grommet seals around light cord where cord enters niche. Worn grommet allows water entry creating electrical hazard and corrosion. Regular grommet replacement is essential pool light maintenance.
Required tools include screwdriver and towels. Required materials include grommet kit and silicone lubricant. Basic tools make this accessible DIY project for all pool owners.
Electrical 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.
Light and old grommet removal requires removing mounting screw, pulling light from niche, removing old grommet, and cleaning cord opening. Proper surface preparation ensures new grommet seals properly.
New grommet installation requires inspecting grommet, lubricating grommet, threading cord through grommet, installing grommet in opening, and verifying proper seating. Proper installation ensures watertight seal.
Leak testing includes reinstalling light, turning on power, and monitoring for 24-48 hours. No water accumulation confirms successful seal. Water presence requires grommet reinstallation.
Troubleshooting addresses water enters niche, grommet won't stay, cord difficult to pull, and light doesn't work. Most problems result from improper grommet installation. Systematic troubleshooting resolves most issues.
Preventive maintenance includes annual inspection and replacement every 5-7 years. Simple maintenance prevents water leaks and electrical damage. Grommet replacement is inexpensive insurance for pool light longevity.
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:
- Grommet kit costs $15-$30, DIY saves $75-$150
- Installation takes 20-30 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 old grommet completely from opening
- Clean cord opening thoroughly
- Lubricate new grommet with silicone
- Thread cord through grommet
- Press grommet firmly into opening
- Verify grommet seats evenly
- Monitor niche for 24-48 hours after installation
- Inspect grommet annually for wear
- Replace grommet every 5-7 years preventively
Explore our complete pool parts selection for pool light parts and cord seal grommets.
