Astralpool IXI / Zodiac JXi Igniter Kit - R0457502
Astralpool IXI / Zodiac JXi Igniter Kit - R0457502 is temporarily out of stock and will ship as soon as it's available.
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Warranty Information
Warranty Information
Astralpool IXI / Zodiac JXi Igniter Kit - R0457502 is temporarily out of stock and will ship as soon as it's available.
Astralpool IXI / Zodiac JXi Igniter Kit - R0457502
This is the genuine Zodiac igniter kit, part number R0457502, for Astralpool IXI and Zodiac JXi gas pool and spa heaters. The same part fits both heater sizes, the 200 and the 370. On the parts diagrams it is item 13 on the electrical system diagram and item 8 on the combustion chamber diagram.
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
What This Part Does
This is the hot surface igniter. When current is passed through its ceramic material it reaches a temperature high enough to ignite the air and fuel mixture (Astralpool IXI manual, section 2.8).
The ignition control powers it after the blower's pre-purge, the gas valve opens once ignition temperature is reached, and the igniter powers down when a stable flame is detected.
The igniter appears on two diagrams under the same part number: item 13 on the electrical system diagram and item 8 on the combustion chamber diagram.
The Rating Plate Rule (rev. IXJ-1.0)
Identify the part by the heater it came from:
- Find the rating plate. It is inside the heater, on the outside of the combustion chamber, and shows the model number, serial number and gas type. Zodiac's JXi manual says these are needed to identify the correct part.
- Check the badge. Astralpool IXI and Zodiac JXi heaters use the same part number for this part, so either badge is fine.
- Check the size. R0457502 is listed for both the 200 and the 370, so the heater size doesn't change the part.
- Match the diagram. On the electrical system diagram this part is item 13, and on the combustion chamber diagram it is item 8. The diagrams are on our IXI / JXi parts page.
Worked Example
Say the rating plate on your heater reads Astralpool IXI 370 and you need the igniter kit. The IXI and the JXi share this part, and R0457502 covers both the 200 and the 370, so R0457502 is the part to order. A Zodiac JXi 200 takes the same R0457502.
Confirmed Compatibility
- Zodiac JXi: 200 and 370
- Astralpool IXI: 200 and 370
Part Numbers and Cross-References
- Zodiac / Astralpool part number: R0457502
- Barcode: 9317545023847
- Jandy / Zodiac USA: the US Jandy JXi parts list uses the same number, R0457502
- Diagram items: 13 on the electrical system diagram, 8 on the combustion chamber diagram
Other Electrical System Parts
- Item 1: Ignition Control Kit (R0456901)
- Item 2: Transformer Kit (R0456301)
- Item 3: User Interface Kit (R0591901), obsolete
- Item 6: Air Pressure Switch Kit (R0456400)
- Item 7: Flue Temp Sensor (R0719401)
- Item 8: Water Pressure Switch Kit
- Item 9: Power Interface Board, PIB (R0719503)
- Item 10: Power Distribution Board, PDB (R0458101)
- Item 11: Temperature Sensor Kit (R0456500)
- Item 12: High Limit Temperature Sensors Kit (R0592301)
- Item 14: Power Interface Harness (R0457702)
Fitting Notes From the Manual
A summary for the qualified technician doing the job. It does not replace the manufacturer's manual.
- The heater must be installed and serviced by a gas fitter licensed and qualified in pool equipment, in accordance with AS/NZS 5601.
- Before opening the heater, turn the controller off, turn off all electrical power to the heater and shut off the external gas supply valve.
- Label all wires before disconnecting them. The manual warns that wiring errors can cause improper and dangerous operation.
- Test all gas connections for leaks with a soap solution. Never use an open flame to test for leaks.
- Verify proper operation after servicing. Don't use the heater if any part has been under water; have a qualified service technician inspect it first.
Frequently Asked Questions
Does it fit the Astralpool IXI as well as the Zodiac JXi?
Yes. The Astralpool IXI and the Zodiac JXi use the same part number, R0457502, for the igniter kit.
Does it fit both the 200 and the 370?
Yes. R0457502 is listed for both heater sizes, the 200 and the 370.
Why is the igniter on two diagrams?
It sits in the combustion chamber and is wired to the ignition control, so it appears as item 13 on the electrical system diagram and item 8 on the combustion chamber diagram. It is the same part, R0457502, on both.
Is this a genuine part?
Yes. Heater and Spa Parts is an authorised Fluidra (Astralpool and Zodiac) dealer and warranty agent, and this is the genuine R0457502.
Manufacturer Catalogues, Diagrams & Part Numbers
Need exploded views, spare part numbers, product numbers or diagrams? See the manufacturer catalogues: Zodiac Catalogue 2026 | Astralpool Catalogue 2026. The exploded diagrams for these heaters, with every IXI / JXi part we list, are on our Astralpool IXI / Zodiac JXi Gas Heater Parts page.
Before ordering: confirm this part is correct for your equipment. Use the catalogues above, seek professional assistance, or contact us with photos of your existing part, model details, serial numbers and any labels. As with all products, this must be diagnosed and fitted by a qualified and experienced person.
Common search terms: Astralpool IXI Igniter Kit, Zodiac JXi Igniter Kit, R0457502, IXI 200 igniter kit, JXi 200 igniter kit, IXI 370 igniter kit, JXi 370 igniter kit, Jandy R0457502, IXI gas heater parts, JXi heater parts, WWDG SpaPro.
To the layperson, plumbing sizes and their names can be confusing due to the nominal sizes and naming conventions used.
This is not something we made up. Plumbers and manufacturers have used nominal (meaning ‘by name only’) sizing for decades.
Simply put, in plumbing, named sizes are often not the actual measurements of the pipe, fitting, or part. A PVC pipe called “50mm” or “2"” does not measure 50 mm anywhere. Instead, it follows nominal sizing, an internationally-standardised naming system.
Almost all fittings we use in the pool & spa industry use “pressure PVC” pipe & fittings. Do not confuse with “DWV” or other pipe & fittings and their names and sizes.
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) |
|---|---|---|
| 1/2" | 15mm | ~21.2–21.5 mm |
| 3/4" | 20mm | ~26.6–26.9 mm |
| 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 |
To reiterate, these are nominal sizes and are designed to fit matching fittings — not to measure what their name suggests. These are based on PVC Pressure Pipe AS/NZ 1477 Dimensions1.
- 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.
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 and other plumbing areas 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).
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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R0457502
