Disc Enclosure, Light Doctor, 10 Hole Light Niche
Disc Enclosure, Light Doctor, 10 Hole Light Niche
31 in stock
Ships from: Newnan, GA
Frequently Bought Together
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Warranty
This product includes a 12 Months manufacturer warranty.
Product Information
Description
Light Doctor 10-Hole Niche Disc Enclosure
Seal the niche. Save the pool.
The Frank Wall Enterprises Light Doctor TLD10D (PST-57-256-1050) is a 12-1/8" OD Lexan® disc that permanently closes a 10-hole pool light niche, so you can retire an old fixture without re-plumbing your wall. It bolts straight onto the original 10-hole pattern used by older American and older Pentair niches, and installs either in front of or behind your vinyl liner. One part, two install options, no leaks.
Built to Stay Sealed
You get a single piece of Lexan® polycarbonate instead of a leak-prone gasket stack. Lexan resists pool chemicals, UV, freeze-thaw cycles, and the day-in day-out flex of vinyl liner movement, so the niche stays watertight long after the original fixture is gone. When you'd rather kill the niche than replace another bulb, this is the part that ends the problem.
Drop-In 10-Hole Fit
The bolt pattern matches the original 10-hole niches found on older American Products and older Pentair light housings. Bolt-to-opposite-bolt is 11-3/8" and adjacent bolts sit 3-1/2" apart, so you can verify fit in 30 seconds with a tape measure before you ever drain the pool. If your niche measures up, this disc goes on without re-drilling.
Front or Behind the Liner
Mount the disc in front of the liner for a service-friendly install you can revisit later, or sandwich it behind the liner for a clean wall with no visible hardware. Either method seals the original 10-hole pattern against the niche flange, which lets you decide between cosmetics and serviceability instead of being forced into one approach.
Who It's For
Vinyl Liner Pools
Engineered specifically for vinyl liner walls where a leaking light niche threatens the liner and the wall behind it.
Abandoned Niches
Retiring a dead 120V fixture and going to perimeter LEDs? This disc permanently caps the wall without a wet-niche replacement.
Older American Niches
Fits the legacy 10-hole American Products niche pattern still common on pools built in the 1980s and 1990s.
Older Pentair Niches
Also fits the original 10-hole Pentair niche pattern, so you don't have to chase down a discontinued OEM disc.
Why PST Customers Pick This
Stops Niche Leaks
Replaces a failed light housing or gasket stack with a single sealed disc, so water stays in the pool instead of behind the liner.
Original Bolt Pattern
Uses the existing 10 mounting holes, no drilling, no enlarged openings, no permanent damage to the niche flange.
Lexan® Hardness
Polycarbonate stands up to chlorine, salt, and pH swings far better than ABS or acrylic discs sold for the same job.
Verified by Measurement
Published 11-3/8" and 3-1/2" hole dimensions let you confirm fit before ordering, no guessing on legacy niches.
Liner-Friendly
Smooth disc face sits flush against the liner, with no sharp edges that snag, crease, or stress the vinyl over time.
Frank Wall Quality
Built by Frank Wall Enterprises, the brand pool techs use when they want a niche problem to stay fixed.
Installation Notice
This disc seals a wet-niche penetration in your pool wall. A poor seal can drive water behind the liner and rot the wall structure. If the original light circuit is still live, disconnect the breaker and verify zero voltage at the niche before touching it. If you are not comfortable bonding the niche per NEC Article 680 and inspecting the liner attachment, hire a licensed pool service technician.
Full Specifications
Frequently Asked Questions
What is the difference between the 10-hole, 8-hole, and 6-hole Light Doctor discs?
The hole count refers to the bolt pattern on your light niche, not the disc itself. Count the screws around your existing niche or the empty bolt holes if the fixture is already out. If you count 10 holes spaced about 3-1/2" apart, with 11-3/8" from a hole to the hole directly across, this TLD10D 10-hole disc is the right part. Wrong hole count means a different disc, so verify before ordering.
Which light niches does this fit?
The TLD10D is designed for the older American Products 10-hole niche and the older Pentair 10-hole niche, both common on vinyl liner pools built from the 1980s through the 1990s. Modern Hayward, Jandy, and current Pentair niches use different bolt patterns and are not compatible.
Will this work on a concrete or fiberglass pool?
No. This disc is engineered for vinyl liner pools only. Concrete, gunite, and fiberglass niches use different sealing methods and require purpose-built closure rings or replacement fixtures.
Can I install this myself?
Many vinyl liner owners install the TLD10D themselves with the pool partially drained below the niche. You need to verify the original light circuit is off at the breaker, remove the failed fixture, clean the niche flange, then bolt the disc to the existing 10-hole pattern. If you are not comfortable working at a wet niche or interpreting bonding requirements under NEC Article 680, have a licensed pool technician do the install.
Do I install it in front of the liner or behind it?
Both are correct, you choose. Mounting in front of the liner is faster, fully serviceable, and works well if you may revisit the niche later. Mounting behind the liner hides the hardware for a cleaner wall but is usually done during a liner replacement, since you have access to the flange before the new liner goes in.
Does it include screws or a gasket?
The TLD10D ships as the Lexan® disc only. Most installers reuse the existing niche fasteners and add a fresh bead of pool-rated silicone or butyl sealant at the disc-to-niche contact face. If your old screws are corroded, replace them with new stainless niche screws before installing the disc.
If I install this, can I still add lighting later?
Yes, but not at this niche, since the disc is intended as a permanent enclosure. Most customers pair the TLD10D with surface-mount perimeter LEDs, floating pool lights, or a new flush LED puck installed in a different location.
Order the TLD10D From PST
Authorized Frank Wall Enterprises dealer. Backed by PST Pool Supplies' service team, with help on the line before and after your install.
Additional Info
| Category | Parts Pool Parts Pool Light Parts |
| SKU | PST-57-256-1050 |
| MPN | TLD10D |
| Manufacturer | FW Enterprises |
| Weight | 0.86 lb |
Let customers speak for us
Thanks, I’ll be sending it back for a return. The switch was too long and didn’t match OEM.
Excellent product, cleans debri with ease
The part was delivered quickly, there was an issue with the gauge being damaged but customer service resolved quickly!
Easy to use. Great instructions. Cleans great so far.
Easy to order - received the next day!
Beautiful!!
The valve fit perfectly and works great.
Fast shipping and great price!
Does what a small weed- eater would do it minutes versus an hour
Great product does exactly what was advertised to do.
I ordered the wrong part. Customer service was very helpful. I returned it and within the week my credit card was credited back. Excellent customer service policy.
