UV Pool Lamp Part Number: Match the Exact Model Before You Order

UV pool lamp part numbers are easy to treat like a small shopping detail. The old lamp looks like a long glass tube. The replacement photo looks close enough. The connector has the same general shape. Then the box arrives, and the real problem starts: the lamp will not seat cleanly, the connector feels wrong, the quartz sleeve gets handled too much, or the controller still asks for service after the swap.

The better move is slower and cheaper. Before ordering a UV lamp, quartz sleeve, power supply, o-ring kit, or flow-switch part, identify the exact system model and match the part against the manufacturer manual. Pool UV equipment is not a generic light fixture. The lamp, sleeve, connector, ballast or power supply, seals, and vessel were chosen as a set.

This guide is for pool owners who want to document the equipment pad, avoid wrong parts, and know when the replacement belongs to a qualified service professional. It is not a shortcut around the manual.

Start with the equipment label, not the burned-out lamp

The lamp itself may have a code printed on it, but that code is not the whole diagnosis. Lamps can be mislabeled, previously replaced with the wrong part, damaged by moisture, or sold under cross-reference numbers that do not explain the complete kit. Start with the UV system label on the vessel or controller. Photograph the brand, model number, serial number, voltage information, and any part-list sticker before taking anything apart.

If the label is faded, take a wide photo of the chamber, controller, unions, cord connector, and plumbing layout. The shape of the vessel, number of ports, controller style, and lamp-access cap can help a dealer or pool professional identify the system. Do not scrape, pry, or twist electrical parts just to find a hidden label while the equipment is energized.

The Pentair BioShield UV System installation and user’s guide includes a replacement-parts table by model number, with separate listings for UV lamps, quartz sleeves, power supplies, vessels, drain plugs, and flow switches. The CMP DEL UV-C manuals and literature page directs owners to current DEL UV-C manuals, flow-switch instructions, and model-specific documents. Use those sources for your exact unit instead of a marketplace listing that only says a lamp is compatible.

Why close enough is not good enough

A UV lamp has to fit inside a quartz sleeve without stressing the glass. The pins need to match the connector. The electrical load needs to match the power supply. The lamp length and arc position need to suit the chamber. The o-rings and retaining parts need to seal without being forced. A part that is almost right can still create leaks, overheating, nuisance alarms, weak UV exposure, or a cracked sleeve.

That is also why visual matching can fool you. Two lamps can have similar ends but different wattage, length, or connector details. Two sleeves can look like plain glass tubes but differ at the sealing end. A generic o-ring may seem to fit in your hand and still be wrong for the groove, lubricant, chemical exposure, or compression expected by the manufacturer.

When a manual lists a replacement lamp by model, treat that part number as the starting point. If a seller claims a substitute, verify it through the manufacturer, an authorized distributor, or a service professional who can identify the actual system. Do not use a substitute because the listing title contains the same pool brand name.

Photograph the parts before the service call

Good photos save money because they reduce guessing. Take a wide shot of the full equipment pad. Then take close photos of the UV controller, lamp-access cap, cord connector, union size markings if visible, warning labels, model label, salt cell, nearby valves, and any alarm or status light. If the system has a separate power supply, include where it is mounted and how the cord reaches the chamber.

If the UV system shares space with a salt chlorine generator, photograph the salt cell label too. Owners often order salt-cell parts while investigating a UV alarm, or order UV parts while chasing a salt-output complaint. Recent PoolUV guides on UV controller lamp-light checks, lamp connector moisture, and UV chamber flow direction all point to the same habit: identify the equipment before buying parts.

Write down the date, the symptom, and what changed before the symptom appeared. A lamp-hour reminder after a known runtime interval is different from a no-lamp-light warning after heavy rain, a leak near the quartz sleeve, or a controller that went dark after electrical work.

What to check in the manual before buying

Read the parts table and the maintenance section together. The parts table tells you what the manufacturer intended for your model. The maintenance section tells you whether lamp replacement is a routine owner task, a qualified-service task, or a procedure with warnings that make the job unsuitable for a quick DIY attempt.

For example, the Pentair BioShield guide describes disconnecting power to both the UV system and pump before service, confirming the lamp is off, loosening the cord connector and adapter, and handling the lamp with latex or cotton gloves. That matters because fingerprints, force, live power, and glass handling can turn a simple replacement into an expensive repair.

Do not invent part numbers from pipe size, pool gallons, filter pressure, or pump horsepower. Those details can matter to system design, but they do not prove which lamp belongs in the chamber sitting on your pad. The manual, model label, and authorized part list win.

Amazon can be useful after the model is known

Online marketplaces are best used after you already know the exact part family. Search with the complete model and part number, then compare photos, dimensions, connector style, seller notes, return policy, and whether the listing includes the seals or accessories you actually need. Keep the manual open while you shop.

Compare pool UV replacement lamps, quartz sleeves, o-ring kits, and lamp-handling supplies on Amazon. Match by exact brand, model, lamp part number, sleeve part number, voltage, connector style, and manufacturer instructions before ordering.

Do not ignore seals, sleeves, and service parts

The lamp may be the only part on the reminder screen, but the surrounding parts deserve attention. A brittle o-ring, scaled quartz sleeve, damp connector, cracked sleeve, missing spacer, or stressed retaining nut can make a new lamp look bad. If the manual calls for inspection, replacement seals, specific cleaning steps, or a water test after service, treat those steps as part of the job.

Quartz sleeves deserve extra caution. They can be fragile, and they keep pool water away from electrical lamp components. Do not force a sleeve because the new lamp does not slide the way you expected. Stop if anything binds, if glass looks cracked, if water is inside a dry area, or if a connector shows corrosion.

Also be realistic about age. If labels are unreadable, parts are discontinued, or a previous owner modified the system, a professional identification visit can be cheaper than ordering three wrong boxes.

When ordering should wait

Delay the order if the controller has no power, the GFCI trips, the chamber leaks, the quartz sleeve is damaged, the power supply looks wet, or the manual restricts the work to qualified personnel. A replacement lamp will not fix unsafe wiring, a failed ballast, a cracked sleeve, or a chamber that is not seeing proper flow.

Also wait if the seller listing conflicts with the manual. Marketplace compatibility charts are helpful, but they are not the authority for your equipment pad. When the part number, connector photo, or model list does not line up, verify before clicking buy.

A clean ordering checklist

First, photograph the UV system label and controller. Second, find the current manual for that exact model. Third, identify the lamp, quartz sleeve, o-rings, and any related kit numbers from the manufacturer document. Fourth, compare the listing against the manual, not against memory. Fifth, keep the old part, photos, and invoice until the system is back together and operating normally.

If a pool professional is doing the work, send the photos before the appointment. The technician may bring the correct lamp, sleeve, seal kit, or power-supply part the first time. That is the whole point: fewer wrong parts, fewer return labels, and less time with the sanitizer system offline.

FAQ

Can I replace a pool UV lamp with a generic lamp that looks the same?

Do not rely on looks. Match the lamp to the exact UV system model and manufacturer part number, including connector style, length, wattage family, and any service-kit requirements listed in the manual.

Where do I find the UV pool lamp part number?

Start with the equipment label on the UV vessel or controller, then use the manufacturer manual or parts table for that model. The old lamp may help confirm the part, but it should not be your only source.

Should I order a quartz sleeve when I order the lamp?

That depends on the manual, sleeve condition, leak history, and service plan. If the sleeve is scaled, cracked, leaking, or due for maintenance, identify the exact sleeve part number before ordering. Do not substitute a similar-looking glass tube.

Why did the new lamp not clear the UV warning?

The warning may involve the power supply, lamp connector, timer reset, flow switch, moisture, wiring, or controller logic. Recheck the manual and stop if electrical or plumbing service is outside routine owner maintenance.