Astralpool Impeller for Viron XT P520 - 40060Z - All Variants

Astralpool Impeller Viron XT P520 40060Z

This is the genuine Astralpool impeller, part number 40060Z, for the Viron XT P520 variable speed pool pump. The same part number covers every generation of the XT P520 from the original release through to the current P520 C XT. It is only 8mm larger in diameter than the P320 impeller, so the two are told apart by vane width rather than overall size, and they are not interchangeable. It is also not the impeller for the Viron eVo range.

Dimensions & Specifications

• Diameter: 121mm
• Length: 95mm
• Vane Width (External): 21.5mm
• Vane Width (Internal): 15.5mm
• Mechanical Seal Type: 3/4" Type 6

These measurements are approximate and can vary slightly due to manufacturing tolerances.

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

The Viron XT Impeller Rule (rev. VIR-2.0)

Almost every wrong impeller sent for these pumps comes from ordering by the number on the pump rather than the letters after it, or from assuming a P320 and P520 share parts. They do not. Work through these four steps in order and finish on a measurement:

1. Read the full model line on the pump badge, not just the number. You are looking for the letters immediately after the number: XT, eVo, or C XT.
2. If the badge says eVo, stop here. The eVo range uses the older CX / P280 / FX family impeller and this part will not fit it.
3. If the badge says XT or C XT, continue — the year does not matter. Isolate power, open the wet end, remove the impeller retaining bolt and withdraw the impeller.
4. Measure the outside diameter across the widest point and the vane width at the outer edge. If it measures approximately 113mm across and 15mm at the outer edge of the vane, you have the smaller P320 impeller and you need 40060X instead. The P520 impeller is approximately 121mm across with a 21.5mm external vane, so measure the vane rather than judging by overall size: the two are only 8mm apart in diameter.

Which Impeller Do I Need?

Every Model and Generation This Impeller Fits

Astralpool revised the Viron XT several times without ever changing the P520 impeller part number. If your pump is badged XT, the 40060Z is correct regardless of its age or which of the revisions below it belongs to:

• Viron P520 XT — original XT release, including all early-production units.
• Viron P520 XT, pre-July 2018 wet end — wet end 40097, seal plate 40098, mechanical seal PS3868. Impeller unchanged.
• Viron P520 XT, July 2018 onwards wet end — revised wet end 40031 and seal plate 40030, mechanical seal PS3868. Impeller unchanged.
• Viron XT Series 2 / XT MkII P520 — revised controller and housing. Impeller unchanged.
• Viron XT P520C (Nov 2020 – June 2021) — impeller unchanged.
• Viron XT P520C (July 2021 onwards) — impeller unchanged.
• Viron P520 C XT — the current model, which supersedes the earlier P520 XT variants. Impeller unchanged.

In short: the wet end and seal plate were both revised over the life of the XT P520, but the impeller has stayed 40060Z throughout and the mechanical seal is the same part, PS3868, on every build. If you are ordering other parts at the same time, some of those are era-dependent and you will need to identify your pump's build date.

What This Impeller Does Not Fit

• Viron XT P320 and P320 C XT — smaller hydraulic package, smaller impeller, approximately 113mm in diameter. Fitting a P520 impeller to a P320 overloads the motor and is a listed cause of the HI A over-current fault. Use 40060X instead.
• Viron eVo range — a different pump generation with a different wet end, sharing its impeller with the CX320 / P280 / FX290 family. Start with the Hurlcon / Astralpool impeller range.
• Viron P520 (original, pre-eVo) — carries its own separate parts breakdown and a different impeller. Send us a photo of your pump badge and we will identify it.
• Viron P600 and CTX series — different wet end and different part number entirely. Contact us with your model details.
• Hurlcon BX, TX, E-series and older CTX pumps — pre-Viron wet ends. See the BX / TX impeller range.

Host Pump Specifications

• Viron P520 XT motor output: 1.5 kW, 240V 50Hz, 6.0 amp, maximum 2820 rpm
• Flow rates: 520 lpm high (2850 rpm), 426 lpm medium (2000 rpm), 200 lpm low (1125 rpm)
• For comparison, the P320 XT is 0.75 kW / 4.1 amp and 320 lpm on high — which is why the impellers differ

Fitting Notes

• Retained by impeller retaining bolt 78187 with o-ring 78711 — inspect both on removal and replace if the o-ring is flattened or the bolt is corroded
• Matching mechanical seal: PS3868, the 3/4" Type 6 Mechanical Seal, which fits every XT P520 build and is listed as 75508 in earlier Astralpool catalogues
• Matching diffuser: 40071B (XT P520). The XT P320 takes 40071A — do not mix them

Symptoms of a Failed or Worn Impeller

• Motor runs at normal speed and normal noise, but flow and filter pressure are both down
• In-floor cleaning heads or spa jets no longer reaching pressure at the speed they used to
• Pump takes far longer to prime, or will not hold prime, with no air leak found on the suction side
• Grinding, rattling or a rhythmic knock from the wet end
• Pump humming but not turning — debris jammed in the impeller is a listed cause in the Astralpool troubleshooting guide, often after the hair and lint basket has split and allowed debris through
• Controller showing the HI A over-current fault — Astralpool lists "wrong impeller fitted" as one of the causes
• Visible debris packed into the vane passages, or vane tips worn back and rounded
• Cracked or spun hub after the pump has run dry

When to Replace

Replace the impeller when the vanes are worn, chipped or cracked, when the hub has spun, or when the pump has run dry and the plastic has distorted. Blocked vanes can often be cleared rather than replaced — check that first. Because the mechanical seal is disturbed whenever the impeller comes off, we recommend fitting a new mechanical seal at the same time rather than reusing a seal whose faces have been separated.

Part Numbers

• 40060Z — Astralpool impeller, Viron XT P520, all generations (this product)
• 40060X — Astralpool impeller, Viron XT P320 (buy here)
• 78187 — impeller retaining bolt
• 78711 — impeller retaining bolt o-ring
• PS3868 — 3/4" Type 6 Mechanical Seal, all XT P520 builds, listed as 75508 in earlier Astralpool catalogues (buy here)
• 40071B — diffuser, XT P520 (40071A for XT P320)
• 78104 — diffuser o-ring
• 40065 — pump basket
• 40089 — lid complete with o-ring
• 21489 — controller, P520
• 71462 — motor, P520
• 40097 / 40031 — pump wet end, pre- and post-July 2018
• 40098 / 40030 — seal plate, pre- and post-July 2018

Frequently Asked Questions

What is the difference between 40060Z and 40060X?
40060Z is the P520 impeller and 40060X is the P320 impeller. The P520 impeller is approximately 121mm in diameter with a 21.5mm external vane, against approximately 113mm and a 15mm external vane on the P320, because the P520 is a higher flow pump running a 1.5 kW motor against the P320's 0.75 kW. Only 8mm apart in diameter, so measure the vane width to tell them apart. They are not interchangeable.

Does this fit older Viron XT P520 pumps?
Yes. The impeller part number has never changed across the life of the XT P520. It covers the original XT, the pre-2018 and post-2018 wet end revisions, the XT Series 2, the P520C and the current P520 C XT.

Can I fit a P520 impeller to a P320 to get more flow?
No. The P320 motor is half the output of the P520 and will draw excessive current trying to turn the larger impeller. Astralpool lists a wrong impeller being fitted as a cause of the HI A over-current fault.

Does the 40060Z fit a Viron eVo?
No. The eVo is a different pump generation and uses the impeller shared with the CX320, P280 and FX290 pumps. Only the XT and C XT versions of the P520 take the 40060Z.

How is the impeller held on?
The Viron XT impeller is secured by a retaining bolt, part 78187, with an o-ring, part 78711. Remove the bolt before attempting to withdraw the impeller, and inspect the o-ring while it is apart.

Do I need a new mechanical seal when I replace the impeller?
We recommend it. The mechanical seal is split apart as soon as the impeller comes off, and reused seal faces are the most common cause of a leak after an impeller change. These pumps use the 3/4" Type 6 Mechanical Seal, part PS3868.

My pump runs but flow has dropped — is the impeller the cause?
Possibly, but check the easy items first: skimmer and pump baskets, lid o-ring, suction blockages and a dirty filter. If those are clear and the motor is running at full speed, a worn or blocked impeller is the next thing to inspect.

Is this a genuine Astralpool part?
Yes. We are an authorised Astralpool and Fluidra dealer and warranty agent, and this is the genuine 40060Z impeller.

Manufacturer Catalogues, Diagrams & Part Numbers

Need exploded views, spare part numbers, product numbers or diagrams? See the manufacturer catalogue: Astralpool Catalogue 2026

Before ordering: confirm this part is correct for your pump. Use the catalogue 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. This is a special-order item.

Common search terms: Astralpool 40060Z, Viron XT P520 impeller, Astral P520XT impeller, Viron P520C impeller, Hurlcon Viron P520 impeller, Viron XT Series 2 impeller, Viron variable speed pump impeller replacement.