Astralpool IXI / Zodiac JXi Blower Assembly Kit - R0591100
Astralpool IXI / Zodiac JXi Blower Assembly Kit - R0591100 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 Blower Assembly Kit - R0591100
Astralpool IXI / Zodiac JXi Blower Assembly Kit - R0591100 is temporarily out of stock and will ship as soon as it's available.
Astralpool IXI / Zodiac JXi Blower Assembly Kit - R0591100
This is the genuine Zodiac blower assembly kit, part number R0591100, 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 1 on the burner assembly (fan and gas valve) diagram.
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
What This Part Does
The combustion blower draws in air and fuel gas, creating the air and fuel mixture that is passed through the burner. It runs for several seconds before the flame starts and after it is extinguished, purging the combustion chamber for a clean burn and expelling residual exhaust gas (Astralpool IXI manual, section 2.8).
Zodiac lists the one blower assembly kit, R0591100, for both heater sizes and for natural gas and LP models.
The manual says the blower must be allowed to run for 45 seconds after the heater shuts off, so the heater's power supply must not be connected to the output of a time clock that simply interrupts the high voltage supply.
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. R0591100 is listed for both the 200 and the 370, so the heater size doesn't change the part.
- Match the diagram. On the burner assembly (fan and gas valve) diagram this part is item 1. 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 blower assembly kit. The IXI and the JXi share this part, and R0591100 covers both the 200 and the 370, so R0591100 is the part to order. A Zodiac JXi 200 takes the same R0591100.
Confirmed Compatibility
- Zodiac JXi: 200 and 370
- Astralpool IXI: 200 and 370
- Gas type: natural gas and LP models
Part Numbers and Cross-References
- Zodiac / Astralpool part number: R0591100
- Barcode: 9317545024349
- Jandy / Zodiac USA: the US Jandy JXi parts list uses the same number, R0591100
- Diagram item: 1 on the burner assembly (fan and gas valve) diagram
Other Burner Assembly Parts
- Item 2: Air Intake Grate Kit (R0591200)
- Item 3: Blower Intake Orifice Kit, 370 (R0734102)
- Item 4: Gas Valve (R0739300)
- Item 5: 200 Burner Kit (R0591702)
- Item 5: 370 Burner Kit (R0591705)
- Item 6: Direct Air Intake Orifice Kit (R0724600)
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.
- 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, R0591100, for the blower assembly kit.
Does it fit both the 200 and the 370?
Yes. R0591100 is listed for both heater sizes, the 200 and the 370.
Why does the blower keep running after the heater stops?
It purges the combustion chamber. The IXI manual says the blower must be allowed to run for 45 seconds after the heater shuts off, so don't power the heater from a time clock that simply cuts the high voltage supply.
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 R0591100.
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 Blower Assembly Kit, Zodiac JXi Blower Assembly Kit, R0591100, IXI 200 blower assembly kit, JXi 200 blower assembly kit, IXI 370 blower assembly kit, JXi 370 blower assembly kit, Jandy R0591100, 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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R0591100
