Astralpool IXI / Zodiac JXi 3 Port Manifold (No Backplate) - R0590101

Astralpool IXI / Zodiac JXi 3 Port Manifold (No Backplate) - R0590101

This is the genuine Zodiac 3-port manifold, part number R0590101, 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 7 on the water system diagram.

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

What This Part Does

The 3-port manifold is the heater's water header, item 7 on the JXi / IXI water system diagram, with the one part number, R0590101, for both heater sizes. It is supplied without a backplate, so order the manifold backplate kit for your heater size separately.

The three ports are a top inlet, a side inlet and the outlet. The Astralpool IXI manual says the top inlet is intended for the Versa Plumb sweep elbow, the side inlet sits at a 26 cm centre height, and both use the same outlet to return heated water to the pool. The inlet you don't use is closed with a union nut and the drain cap.

The manual also shows two header types, A and B. Send us a photo of your header before ordering and we will confirm this manifold suits your heater.

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. R0590101 is listed for both the 200 and the 370, so the heater size doesn't change the part.
4. Match the diagram. On the water system diagram this part is item 7. The diagrams are on our IXI / JXi parts page.
5. Check the header type. The Astralpool IXI manual shows two header types, A and B. Send us a photo of your header before ordering and we will confirm the part suits it.

Worked Example

Say the rating plate on your heater reads Astralpool IXI 370 and you need the 3-port manifold. The IXI and the JXi share this part, and R0590101 covers both the 200 and the 370, so R0590101 is the part to order. A Zodiac JXi 200 takes the same R0590101.

Confirmed Compatibility

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

Part Numbers and Cross-References

• Zodiac / Astralpool part number: R0590101
• Barcode: 9317545021645
• Diagram item: 7 on the water system diagram

Other Water System Parts

• Item 1: VersaFlo Integrated Bypass (WG000016)
• Item 2: Thermal Regulator Valve (TRV)
• Item 3: Bypass Kit (R0589800)
• Item 4: Drain Plug Kit (R0446000)
• Item 5: Gasket & Seals Kit (R0589500)
• Item 6: 200 Manifold Backplate Kit (R0590002)
• Item 6: 370 Manifold Backplate Kit (R0590005)
• Item 8: Water Pressure Switch Kit
• Item 9: Goody Bag Kit (R0593500)
• Item 10: Universal Half Union Kit, needs two (R0522900)
• Item 11: Sweep Elbow AquaLink Temp Sensor (WSEAQL1001)
• Item 12: Drain Cap Assembly Kit (R0523000)

Fitting Notes From the Manual

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

1. Turn off all power to the heater at the breaker and turn off the main gas supply. Make sure the pump is off and will stay off for the whole job.
2. Seat each union o-ring properly and tighten union nuts hand tight only. Don't overtighten, and don't use pipe joint compound or tape.
3. Only nominal 50 mm PVC or CPVC may be connected to the heater's water connections.
4. Return all valves to their operating positions, restore power, run the pump and inspect carefully for leaks, then restore the gas supply and check for proper flow.

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, R0590101, for the 3-port manifold.

Does it fit both the 200 and the 370?
Yes. R0590101 is listed for both heater sizes, the 200 and the 370.

Which inlet should I plumb to?
Either. The IXI manual says the top inlet is intended for the Versa Plumb sweep elbow and can increase hydraulic efficiency, while the side inlet sits at a 26 cm centre height for replacement or new plumbing. Both use the same outlet, and the unused inlet is closed with the drain cap.

What pipe connects to the manifold?
The heater has a standard 50 mm water manifold and coupling design, and only nominal 50 mm PVC or CPVC may be connected. The IXI manual recommends 50 mm pipe, with a minimum of 40 mm fitted to the heater.

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 R0590101.

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 3 Port Manifold, Zodiac JXi 3 Port Manifold, R0590101, IXI 200 3-port manifold, JXi 200 3-port manifold, IXI 370 3-port manifold, JXi 370 3-port manifold, IXI gas heater parts, JXi heater parts, WWDG SpaPro.