Balboa / Joyonway UltraZone 50mg/hr Spa CD Ozone Generator
Balboa / Joyonway UltraZone 50mg/hr Spa CD Ozone Generator is backordered and will ship as soon as it is back in stock.
Don't Guess - Ask Us!
Don't Guess - Ask Us!
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Delivery and Shipping
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Balboa / Joyonway UltraZone 50mg/hr Spa CD Ozone Generator is backordered and will ship as soon as it is back in stock.
Joyonway / Balboa UltraZO₃ne CD Spa Ozone Generator – 50mg/hr (Venturi Type)
Genuine-style CD (corona discharge) spa ozonator designed for venturi injection systems. Produces up to 50mg/hr ozone output to help keep spa water clearer and reduce chlorine demand (when the rest of the water balance is correct).
Part Numbers & Compatibility
- New version: B-P78B138, jwP78B138
- Also replaces: numerous older spa ozonators used across multiple control platforms (common upgrade/replacement unit). eg: APG-U, Del-Ozone, SpaPro, WWDG, Beyok Ozone FQ-300-SPA, Trump XP, Ultra Pure Water Quality UPS350, Ozone Generator RQ-SPA-100 XP07604, Aqua Sun XL-30 / BO3 Spa CD / Pacifica XL-30, Joyonway P54B104
Electrical Specifications
- Input: 100–240V AC
- Frequency: 50–60Hz
- Current: 100mA
Plug Type & Control System Fitment
Supplied with an AMP style cable/plug to suit many common spa control systems, including:
- Gecko / Aeware: in.y series
- Balboa: GS, GL, BP series
- Zink / Ethink: KL8800, KL8-3A series
- Joyonway
- SpaTech: CII, CIII series
Installation Notes
- Mount vertically with the connections facing downward.
- Ensure the ozone line runs to a venturi injector / ozone mixer (not directly into the water line without the correct injector/check valve setup).
Tip: If your spa ozone isn’t working, don’t guess—most faults are power, plumbing, or check-valve related.
Read our Spa Ozone Testing & Troubleshooting FAQ
Keywords shoppers search for: spa ozonator, Balboa ozone generator, Joyonway ozonator, P78B138, P54B104, AMP ozone plug, Gecko in.y ozone, Balboa BP ozone, corona discharge ozonator, venturi spa ozone.
In plumbing, named sizes are not the actual measurements. A pipe called “50mm” or “2"” does not measure 50 mm across. Instead, it follows nominal sizing, an internationally-standardised naming system.
Use the Outside Diameter (OD) to check your pipe against fittings. Below is a quick reference for common spa & pool pipe sizes:
| Imperial Name | Metric Name | Pipe Diameter (OD) |
|---|---|---|
| 1" | 25 mm | ~33.4–33.7 mm |
| 1.5" | 40 mm | ~48.1–48.4 mm |
| 2" | 50 mm | ~60.2–60.8 mm |
| 2.5" | 65 mm | ~75.2–75.5 mm |
These are nominal sizes and are designed to fit matching fittings — not to measure exactly what their name suggests.
Understanding Plumbing Sizes & Nominal Measurements
Plumbing sizes can be confusing. PVC and many other pipe systems use nominal sizes—the size is a name, not the exact measured dimension. This convention is used across most pool and spa systems so that pipes and fittings remain compatible.
Why pipe sizes don’t match the measurements
The Nominal Pipe Size (NPS) system standardises pipe dimensions so that pipes, fittings, valves, and accessories interoperate. Plumbers work with these nominal names every day, but DIYers can be tripped up if they try to match by a tape-measure alone.
How to Measure Pipe Correctly
-
Pipe size is identified by:
- The pipe’s Outside Diameter (OD).
- The fitting’s Inside Diameter (ID) (socket opening).
- Pipe Class / Schedule (e.g., Class 9, 12, 18 or Sch 40) relates to wall thickness and therefore the Internal Diameter (ID) and pressure rating.
- The outside diameter of a fitting is not useful (wall thickness varies by manufacturer).
PVC Pressure Pipe AS/NZ 1477 Dimensions1:
Common nominal sizes with typical outside diameters and indicative inside diameters by class.
| Imperial Name | Metric Name | Outside Diameter (OD) |
|---|---|---|
| 1/2" | 15 mm | ~21.2–21.5 mm |
| 3/4" | 20 mm | ~26.6–26.9 mm |
| 1" | 25 mm | ~33.4–33.7 mm |
| 32 mm | ~42.1–42.4 mm | |
| 1.5" | 40 mm | ~48.1–48.4 mm |
| 2" | 50 mm | ~60.2–60.8 mm |
| 65 mm | ~75.2–75.5 mm | |
| 2.5" | ~73 mm |
- º Internal diameters vary slightly by manufacturer and class.
- 1 Not all pool/spa fittings match these dimensions exactly. Some do not follow Australian or international standards. Chinese spas may use proprietary fittings.
Hose & Tube Dimensions
Common flexible hose sizes used in pool/spa systems (approximate IDs).
| Imperial Name | Metric Name | Inside Diameter (ID) |
|---|---|---|
| 3/8" | 9–10 mm | ~9 mm |
| 3/4" | 19 mm | ~19 mm |
BSP – British Standard Pipe Thread Sizes
BSP thread names are also nominal. The thread OD will not equal the nominal name.
| BSP Thread Size Naming | Outside Diameter (mm / inch) | TPI |
|---|---|---|
| 1/16" BSP | 7.7 mm / 0.304" | 28 |
| 1/8" BSP | 9.7 mm / 0.383" | 28 |
| 1/4" BSP | 13.16 mm / 0.518" | 19 |
| 3/8" BSP | 16.66 mm / 0.656" | 19 |
| 1/2" BSP / 15 mm | 20.99 mm / 0.825" | 14 |
| 5/8" BSP | 22.99 mm / 0.902" | 14 |
| 3/4" BSP / 20 mm | 26.44 mm / 1.041" | 14 |
| 7/8" BSP | 30.20 mm / 1.189" | 14 |
| 1" BSP / 25 mm | 33.25 mm / 1.309" | 11 |
| 1-1/4" BSP | 41.91 mm / 1.650" | 11 |
| 1-1/2" BSP / 40 mm | 47.80 mm / 1.882" | 11 |
| 2" BSP / 50 mm | 59.61 mm / 2.347" | 11 |
| 2-1/4" BSP | 65.71 mm / 2.587" | 11 |
| 2-1/2" BSP | 75.18 mm / 2.960" | 11 |
| 3" BSP | 87.88 mm / 3.460" | 11 |
| 4" BSP | 113.03 mm / 4.450" | 11 |
| 5" BSP | 138.43 mm / 5.450" | 11 |
| 6" BSP | 163.83 mm / 6.450" | 11 |
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