Astralpool IXI / Zodiac JXi Refractory Kit (Internal) - R0590500

Astralpool IXI / Zodiac JXi Refractory Kit (Internal) - R0590500

This is the genuine Zodiac internal refractory kit, part number R0590500, 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 3 on the combustion chamber diagram.

• Physically Stocked, unlike most "drop-shipping" websites.
• Shipped from VIC, NSW, WA, QLD

What This Part Does

The internal refractory kit is item 3 on the JXi / IXI combustion chamber diagram. Zodiac lists the one part number, R0590500, for both the 200 and the 370.

The burner sits inside the sealed combustion chamber. The Astralpool IXI manual notes that when the heater is fired for the first time, the combustion chamber refractory binder material is driven out by the heat of the flame, and white smoke or sharp odours may come from the vent for a few minutes. Don't inhale the fumes.

It is a different part from the external insulation kit, item 9 on the same diagram.

The Rating Plate Rule (rev. IXJ-1.0)

Identify the part by the heater it came from:

1. 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.
2. Check the badge. Astralpool IXI and Zodiac JXi heaters use the same part number for this part, so either badge is fine.
3. Check the size. R0590500 is listed for both the 200 and the 370, so the heater size doesn't change the part.
4. Match the diagram. On the combustion chamber diagram this part is item 3. 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 internal refractory kit. The IXI and the JXi share this part, and R0590500 covers both the 200 and the 370, so R0590500 is the part to order. A Zodiac JXi 200 takes the same R0590500.

Confirmed Compatibility

• Zodiac JXi: 200 and 370
• Astralpool IXI: 200 and 370

Part Numbers and Cross-References

• Zodiac / Astralpool part number: R0590500
• Barcode: 9317545022567
• Jandy / Zodiac USA: the US Jandy JXi parts list uses the same number, R0590500
• Diagram item: 3 on the combustion chamber diagram

Other Combustion Chamber Parts

• Item 4: Combustion Chamber Shelf, 200 only (R0590701)
• Item 5: Combustion Chamber Lid Kit (R0590800)
• Item 8: Igniter Kit (R0457502)
• Item 11: 200 Heat Exchanger Assembly (R0589402)
• Item 11: 370 Heat Exchanger Assembly (R0589405)

Fitting Notes From the Manual

A summary for the qualified technician doing the job. It does not replace the manufacturer's manual.

1. The heater must be installed and serviced by a gas fitter licensed and qualified in pool equipment, in accordance with AS/NZS 5601.
2. Before opening the heater, turn the controller off, turn off all electrical power to the heater and shut off the external gas supply valve.
3. Test all gas connections for leaks with a soap solution. Never use an open flame to test for leaks.
4. 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, R0590500, for the internal refractory kit.

Does it fit both the 200 and the 370?
Yes. R0590500 is listed for both heater sizes, the 200 and the 370.

Is smoke from the vent normal?
The IXI manual says that when the heater is first fired, the refractory binder is driven out by the flame and white smoke or sharp odours may come from the vent for a few minutes. Don't inhale the fumes. If smoke or odours continue beyond a few minutes, shut the heater down and have it checked by a qualified technician.

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 R0590500.

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 Refractory Kit, Zodiac JXi Refractory Kit, R0590500, IXI 200 internal refractory kit, JXi 200 internal refractory kit, IXI 370 internal refractory kit, JXi 370 internal refractory kit, Jandy R0590500, IXI gas heater parts, JXi heater parts, WWDG SpaPro.