🌬️ Joyonway Ozone Generator P78B138 – Corona Discharge Ozone Unit (50 mg/hr)

Natural Water Purification for Cleaner, Fresher Hot Tub Water with Reduced Chemical Usage

📋 Product Overview

The Joyonway Ozone Generator P78B138 is a compact Corona Discharge (CD) ozone unit designed specifically for hot tub and spa water sanitation. This efficient ozonator produces 50 mg/hour of ozone, providing continuous water purification that works alongside your existing sanitiser to kill bacteria, break down organic contaminants, and keep your spa water crystal clear.

Operating at 240V/50Hz, this unit integrates seamlessly with virtually any hot tub equipped with a venturi injection system. The Corona Discharge technology offers superior ozone production compared to UV-based alternatives, delivering consistent output throughout the unit’s lifespan without the gradual degradation seen in UV bulb systems.

Ideal for hot tub owners seeking to reduce chemical usage while maintaining excellent water quality, the P78B138 activates automatically during filter cycles or 24-hour circulation modes, requiring no manual intervention once installed.

⭐ Key Features

✅ Corona Discharge Technology – More efficient and longer-lasting than UV ozone generators, providing consistent 50 mg/hr output without bulb replacement

✅ Universal Venturi Compatibility – Fits virtually any hot tub or spa with a venturi injection system for easy retrofitting

✅ Compact Design – Measures just 110 × 70 × 30 mm, fitting easily in tight cabinet spaces

✅ UK Power Standard – 240V/50Hz operation for direct connection to UK spa control systems

✅ Automatic Operation – Activates during filter cycles, 24-hour circulation, or dedicated ozone mode via spa pack control

✅ Reduced Chemical Dependence – Ozone oxidation breaks down contaminants, allowing lower sanitiser levels while maintaining water quality

✅ Odour Elimination – Destroys organic compounds that cause unpleasant spa odours

✅ Eco-Friendly Sanitation – Ozone reverts to oxygen after treatment, leaving no chemical residue in the water

🔧 Technical Specifications

Specification	Value
Model	P78B138
Brand	Joyonway
Ozone Technology	Corona Discharge (CD)
Ozone Output	50 mg/hour
Voltage	240V AC
Frequency	50Hz
Dimensions (L × W × D)	110 × 70 × 30 mm
Installation Type	Venturi injection system
SKU	OZ-JO101

🎯 Ideal Applications

🛁 Hot Tub Replacement Units – Direct replacement for failed or ageing ozonators in existing spas, compatible with standard venturi systems

🔄 Upgrade from UV Ozone – Transition from UV ozone generators to more efficient Corona Discharge technology for consistent long-term performance

🏠 DIY Hot Tub Builds – Perfect for self-build projects requiring reliable, compact ozone sanitation

♨️ Joyonway Spa Systems – Designed for seamless integration with Joyonway control packs and spa systems

🌊 General Spa Retrofitting – Add ozone capability to older hot tubs that previously lacked ozone sanitation

💡 How Corona Discharge Ozone Works

The P78B138 uses Corona Discharge technology to generate ozone (O₃) from ambient air:

1. Air Intake – Air is drawn through the ozone injector connected to your venturi system
2. Corona Discharge – An electrical field splits oxygen molecules (O₂) into individual oxygen atoms
3. Ozone Formation – These atoms recombine to form ozone (O₃), a powerful oxidising agent
4. Water Treatment – Ozone-enriched air mixes with spa water via the venturi, destroying bacteria and organic contaminants
5. Safe Reversion – After oxidation, ozone naturally reverts to oxygen (O₂), leaving no harmful residue

🧪 Benefits of Ozone Sanitation

Benefit	Description
🦠 Bacterial Elimination	Ozone destroys bacteria up to 3,000× faster than chlorine
💊 Reduced Chemical Usage	Lower sanitiser requirements with ozone as a primary oxidiser
👃 No Chemical Odours	Eliminates chloramine smell common in heavily chlorinated spas
💧 Clearer Water	Breaks down oils, lotions, and organic matter for improved clarity
🌿 Environmentally Friendly	No chemical byproducts – ozone simply becomes oxygen
🔇 Silent Operation	No moving parts for quiet, maintenance-free performance

🛠️ Installation Requirements

Before purchasing, ensure your hot tub setup includes:

✅ Venturi Injector – Standard venturi fitting for ozone injection into water line

✅ Ozone Port on Spa Pack – Most modern control systems include a dedicated ozone output

✅ Adequate Cabinet Space – Unit requires 110 × 70 × 30 mm mounting area

✅ Check Valve – Prevents water backflow into the ozone generator (essential for unit longevity)

⚠️ Important: Always install a check valve between the ozone generator and venturi to prevent water damage to the unit.

🏆 Why Choose the Joyonway P78B138?

✅ Corona Discharge Advantage – Unlike UV ozonators that lose effectiveness as bulbs age, CD technology maintains consistent 50 mg/hr output throughout the unit’s lifespan

✅ Universal Fit – Works with virtually any venturi-equipped hot tub, not just Joyonway systems

✅ Compact Footprint – At just 110 × 70 × 30 mm, it fits where larger units cannot

✅ Plug-and-Play Installation – Standard connections for straightforward replacement or new installations

✅ Proven Brand – Joyonway is a trusted name in hot tub control systems and components

✅ Excellent Value – Affordable Corona Discharge technology typically found only in premium units

🛒 Why Buy From Parts4Tubs?

🤝 Expert Support – Buy from Andi and the team who understand hot tub systems inside and out, not just a faceless website

📦 UK Stock – Items shipped from Northamptonshire for fast UK delivery

🔧 Technical Guidance – Advice available on compatibility and installation for your specific spa setup

💷 Competitive Pricing – Trade and retail pricing with VAT included

🔄 Easy Returns – Hassle-free returns policy if the part doesn’t suit your needs

✨ Summary

The Joyonway Ozone Generator P78B138 delivers efficient Corona Discharge ozone sanitation in a compact, universally compatible package. With 50 mg/hour ozone output, 240V/50Hz UK-standard operation, and dimensions of just 110 × 70 × 30 mm, this unit provides an excellent solution for hot tub owners seeking cleaner water with reduced chemical usage. Whether you’re replacing an existing ozonator or adding ozone capability to your spa, the P78B138 offers proven performance at an accessible price point.