Astralpool Viron & eQuilibrium Chlorinator Cooling Fan 2030037 - V18, V25, V35, V45, EQ18, EQ25, EQ35 & EQ45 - Genuine Chlorinator Spare Part

Name: Astralpool Viron & eQuilibrium Chlorinator Cooling Fan 2030037 - V18, V25, V35, V45, EQ18, EQ25, EQ35 & EQ45 - Genuine Chlorinator Spare Part
Brand: Astralpool
SKU: 2030037
Price: 66.00 AUD
Availability: InStock

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Astralpool Viron & eQuilibrium Chlorinator Cooling Fan 2030037 - V18, V25, V35, V45, EQ18, EQ25, EQ35 & EQ45 - Genuine Chlorinator Spare Part is temporarily out of stock and will ship as soon as it's available.

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Warranty Information

Warranty Information Here

Astralpool Viron & eQuilibrium Chlorinator Cooling Fan 2030037

Genuine Astralpool 2030037 cooling fan for the controller (power pack) of the Astralpool Viron and Viron eQuilibrium salt chlorinators. It is item 9 in diagram, Cooling Fan, in the exploded parts list of Astralpool's Viron eQuilibrium manual.

Genuine Authorised Fluidra Dealer & Warranty Agent
We carry more spare parts than anyone.

Suits the following chlorinators

Astralpool Viron - V18, V25, V35, V45
Astralpool Viron eQuilibrium - EQ18, EQ25, EQ35, EQ45

The same fan is used across all sizes of both ranges. For RolaChem RC9 controllers, contact us to confirm fitment before ordering.

Which fan do I need?

Astralpool chlorinator controllers use different cooling fans. Match the fan to your model:

Viron and Viron eQuilibrium: 2030037 (this part)
Halo: SP76224 (buy here)
VX series and E-Series E35: 76223 (contact us)

When to replace it

Grinding, rattling or buzzing noise from the fan
Blades cracked, chipped, loose or wobbling
Fan will not turn freely by hand with the controller switched off and unplugged
Ants, insects, dirt or debris packed into the fan or the vents

Keeping the controller cool

Astralpool's Viron manual notes the unit is vented so the electronics can cool and are protected against extremes of temperature. It recommends mounting the controller 1 metre above ground level, preferably out of direct sunlight.

The manual also warns that ants and some insects are often attracted to the warmer, dry environment inside the enclosure. It recommends spraying a surface insecticide, with the power turned off, on the surfaces surrounding the controller.

Specifications

Part number: 2030037
Type: Controller cooling fan
Suits: Astralpool Viron V18, V25, V35, V45 and Viron eQuilibrium EQ18, EQ25, EQ35, EQ45 chlorinators
Brand: Astralpool, a Fluidra brand

Frequently Asked Questions

Will this fit my Halo?
No. The Halo uses cooling fan SP76224. Buy the Halo fan here.

Is it the same fan for all Viron and eQuilibrium sizes?
Yes. One fan, 2030037, is used across the 18, 25, 35 and 45 models of both ranges.

Can I fit it myself?
The controller runs on mains power. This part must be diagnosed and fitted by a qualified and experienced person, with the controller switched off and unplugged before the enclosure is opened.

Related parts

SP714001 - Viron / eQuilibrium / Halo cell cable (buy here)

See the full range of genuine Astralpool and Zodiac chlorinator cells and electrodes.

Before ordering

Confirm this part is correct for your equipment before ordering. Use the catalogue below, 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. Warranty details are on our warranty information page.

Manufacturer Catalogues, Diagrams & Part Numbers

Need exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues: Astralpool Catalogue 2026 | Zodiac Catalogue 2026

Common search terms: Astralpool 2030037, 2030037, Viron cooling fan, Viron chlorinator fan, Viron controller fan, eQuilibrium cooling fan, Viron EQ fan, EQ25 fan, EQ35 fan, Astral Viron fan, Fluidra Viron fan, 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 Dimensions^1.

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.

Quick example: A 2" / 50 mm fitting is named for the pipe it connects to, but the pipe’s actual outside diameter (OD) is approx. 60.3 mm (typically ~60.2–60.5 mm in AS/NZ pressure pipe).

Another example: a 2” / 50mm o-ring may refer to a barrel union, etc that suits 50mm pipe. Eg: a “50mm Balboa Gasket” refers to a heater gasket that measure 74mm across, but suits a Balboa barrel union made for 50mm pipe (and the 50mm pipe does not measure 50mm either!)

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).

Important: For pool/spa work, most plumbing uses Pressure Pipe (AS/NZ standards) — not DWV. Always check OD and the pipe class against your equipment specifications.

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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