Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
Written by
James Crawford
James Crawford
Last updated: March 14, 2026
Keeping your pool ozone generator running at peak performance requires periodic part replacements. This guide covers every replacement part you may need, where to find them, what they cost, and how to know when it is time to order.
Essential Replacement Parts Overview
| Part | Replacement Interval | Typical Cost | DIY Difficulty |
|---|---|---|---|
| UV lamp (185nm) | Every 12–18 months | $30–$80 | Easy |
| Corona discharge cell | Every 3–5 years | $150–$400 | Moderate |
| Ozone-resistant tubing | Every 1–2 years | $10–$25 | Easy |
| Check valve | Every 2–3 years | $10–$30 | Easy |
| Venturi injector | Every 5–10 years | $50–$100 | Moderate |
| Air dryer desiccant | Every 6–12 months | $15–$40 | Easy |
| O-rings and gaskets | As needed | $5–$15 | Easy |
| Control board/fuse | Rare (failure only) | $50–$200 | Moderate to hard |
UV Lamps
UV ozone generators rely on a mercury vapor lamp emitting light at 185 nanometers to produce ozone. This is the most frequently replaced part in any UV-based ozone system.
When to Replace
Replace the UV lamp every 12–18 months regardless of whether it still glows. The 185nm ozone-producing wavelength degrades faster than the visible light the lamp emits. A lamp that appears to work may produce little to no ozone.
Performance signs: Rising chlorine demand, increasing chloramines (combined chlorine above 0.2 ppm), or declining water clarity after months of normal performance all suggest a depleted lamp.
How to Find the Right Lamp
UV lamps are model-specific. You need the exact replacement for your generator:
- Check the generator’s manual for the lamp part number
- Note the lamp wattage, base type, and length
- Order directly from the manufacturer or an authorized dealer
- Cross-reference generic lamp databases if OEM parts are unavailable
Do not substitute a different lamp — even a lamp that physically fits may emit the wrong wavelength or wattage. Only 185nm lamps produce ozone; standard germicidal lamps (254nm) kill bacteria but do not create ozone.
Popular UV Lamp Replacements
- DEL Ozone lamps: Available through DEL Ozone dealers and online retailers ($40–$70)
- Prozone replacement lamps: Available from ProZone directly ($35–$60)
- Generic compatible lamps: Some manufacturers use standard lamp formats — verify compatibility before purchasing ($25–$50)
Corona Discharge Cells
The corona discharge cell is the most expensive consumable part in a CD ozone generator but also the longest-lasting. These cells degrade gradually, so performance loss is often subtle until output drops significantly.
When to Replace
- Cell is 4+ years old and output has noticeably declined
- Generator diagnostic shows output below 70% of rated capacity
- Visible damage — discoloration, pitting, cracks in the dielectric
- Ozone smell has weakened despite the system running normally
Sourcing CD Cells
CD cells are proprietary to each manufacturer. Always order from the original manufacturer or authorized dealer:
- DEL Ozone cells: $200–$350 depending on model
- Clearwater Tech cells: $250–$400 for commercial models
- CircuPool cells: $150–$250
- A2Z Ozone plates: $100–$200
Ozone-Resistant Tubing
The tubing connecting your generator to the venturi injector must be ozone-rated. Standard vinyl, PVC, or rubber tubing degrades within weeks of ozone exposure, becoming brittle, cracked, and eventually causing system failure.
Recommended Materials
| Material | Ozone Resistance | Flexibility | Cost per Foot |
|---|---|---|---|
| PTFE (Teflon) | Excellent | Moderate | $1.50–$3.00 |
| Kynar (PVDF) | Excellent | Low (rigid) | $2.00–$4.00 |
| Silicone (ozone-grade) | Good | High | $1.00–$2.50 |
| Norprene | Good | Moderate | $1.50–$3.00 |
For most residential installations, PTFE or ozone-grade silicone tubing with a 3/8″ or 1/4″ inner diameter is ideal. Purchase 6–10 feet to have extra on hand for future replacements.
Check Valves
The check valve prevents water from flowing backward from the venturi into the ozone tubing and generator. This is a critical safety component — a failed check valve can destroy the generator within minutes.
Types of Check Valves for Ozone
- Spring-loaded inline check valve: Most common; uses a spring-loaded disc or ball to seal against backflow. Ensure the internal components are ozone-compatible (Viton or EPDM seals)
- Duckbill check valve: Uses a flexible rubber duckbill that opens with positive pressure and seals with negative pressure. Simple and reliable but must use ozone-rated rubber
Replace the check valve every 2–3 years or immediately if you see water in the ozone tubing.
Venturi Injectors
Quality venturi injectors (Mazzei-style) are extremely durable and rarely need replacement. When they do, it is usually due to mineral scaling that cannot be cleaned or physical damage.
Sizing Your Replacement
Match the venturi to your plumbing size (typically 1.5″ or 2″ for residential pools) and ensure the suction port fits your ozone tubing diameter. Mazzei injectors are available in multiple sizes with published flow rate and suction specifications — match these to your pump’s output at the venturi location.
Air Dryer Desiccant
Corona discharge generators with integrated air preparation use indicating desiccant beads (typically silica gel with a cobalt-free moisture indicator) to remove humidity from incoming air.
Regeneration vs Replacement
Some desiccants can be regenerated by heating in an oven (250°F / 120°C for 2–3 hours). Others are single-use. Check your generator’s manual for specific instructions.
If purchasing new desiccant, use the same type and quantity specified by the manufacturer. Generic indicating silica gel beads work for most applications — verify bead size and indicator type match.
Where to Buy Parts
- Manufacturer direct: Most reliable for exact-fit parts. DEL Ozone, CircuPool, Clearwater Tech, and ProZone all sell parts through their websites or dealer networks
- Pool supply retailers: Large retailers carry common replacement parts including tubing, check valves, and some UV lamps
- Amazon and online marketplaces: Good source for generic tubing, check valves, and desiccant. Verify compatibility before ordering
- Specialty ozone suppliers: Companies like Ozone Solutions carry a wide range of ozone components and tubing
Keeping a Parts Inventory
For uninterrupted ozone treatment, keep these parts on hand:
- One spare UV lamp (if UV system) or one set of desiccant beads (if CD system)
- 6–10 feet of ozone-rated tubing
- One spare check valve
- Spare barb fittings and hose clamps
Total cost to stock spares: $50–$100. This small investment prevents downtime when a part fails unexpectedly.
For a detailed maintenance schedule, see our ozone pool maintenance guide. For help determining when to replace parts vs the entire unit, read how often to replace pool ozone generators.
Related Articles
- Pool Ozone System Guide
- Best Pool Ozone Generators
- Complete Guide to Ozone Water Treatment
- Spa Ozone System Guide
About the Author
James Crawford
Commercial Water Systems Specialist · Last updated: March 14, 2026James Crawford brings 20 years of hands-on experience in commercial water systems, from aquatics facilities to industrial wastewater treatment. He covers system sizing, regulatory compliance, and evaluates ozone equipment for large-scale operations.
