Zodiac VX65 IQ Main Housing 4WD White - R0531201
Zodiac VX65 IQ Main Housing 4WD White - R0531201 is temporarily out of stock and will ship as soon as it's available.
Don't Guess - Ask Us!
Don't Guess - Ask Us!
Not sure if it’s the right part? Send us a message and a photo of what you’re replacing, or what you need, and we’ll help make sure you get the right part the first time.
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Delivery and Shipping Info
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Warranty Information
Warranty Information
Zodiac VX65 IQ Main Housing 4WD White - R0531201
Zodiac VX65 IQ Main Housing 4WD White - R0531201 is temporarily out of stock and will ship as soon as it's available.
Zodiac VX65 IQ Main Housing 4WD White - R0531201
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
R0531201 is the genuine Zodiac Main Housing 4WD White for the VX65 IQ. The manufacturer lists it as MAIN HOUSING 4WD WHITE, item 36 on the VX65 IQ spare parts list. The VX65 IQ is a discontinued model, and this part is listed on its spare parts list in the discontinued section of the 2026 Australian catalogue.
The Letter And Number Rule (rev. R0531201-BODY-1.0)
Mouldings are the parts most often ordered wrong, because several look alike:
- Order by the number on the part, not by shape. Manufacturers identify mouldings by position and letter, and the differences between them can be a single mounting boss.
- Check the model first, then the position. Mouldings rarely carry across between models even within the same family, and a part number from one list is not the same part on another.
- Look at what actually failed. A cracked or broken moulding is what this part replaces. A sound moulding that will not sit down is usually a stripped screw, a distorted chassis, or trapped debris.
- Check the fasteners while it is apart. Thread-forming screws lose their bite after repeated removal. Replace any that no longer hold.
Fitment
| Cleaner | Brand | Parts list item | Manufacturer description |
|---|---|---|---|
| VX65 IQ | Zodiac | Item 36 | MAIN HOUSING 4WD WHITE |
Not confirmed: any cleaner other than the VX65 IQ. This part number appears on that one spare parts list in the 2026 Australian catalogue, so send us a photo of the part and your cleaner's data label if yours is a different model.
When to Replace
- The moulding is cracked or split, particularly at a screw boss or mounting point.
- It is missing, or damaged enough that it no longer locates correctly.
- It has been distorted by heat or chemical exposure and no longer sits flush.
Fitting Notes
- Isolate the cleaner before starting: switch off and unplug a robotic cleaner at the power supply, or turn off the filter pump and remove a suction cleaner from the pool.
- Remove the fasteners holding the moulding, keeping them in order so each returns to its own hole.
- Transfer any clips, seals or inserts from the old moulding to the new one.
- Offer the new moulding up and check it locates on every mounting point before tightening.
- Tighten evenly and replace any fastener that no longer bites.
Specifications
- Part number: R0531201
- Manufacturer description: MAIN HOUSING 4WD WHITE
- Parts list reference: item 36 on the VX65 IQ list
- Brand: Zodiac
- Model: VX65 IQ (discontinued)
- Supplied as: one item unless the description states a set or pack
Frequently Asked Questions
Which cleaner does R0531201 fit?
The Zodiac VX65 IQ. The 2026 Australian catalogue lists it as item 36 on that model's spare parts list. The VX65 IQ is discontinued, but the part is still catalogued.
What does the manufacturer call this part?
The catalogue description is MAIN HOUSING 4WD WHITE.
Is this a genuine part?
Yes. Heater and Spa Parts is an authorised Fluidra dealer and warranty agent, and R0531201 is the genuine part number.
Do you actually hold stock?
We hold physical stock across warehouses in VIC, NSW, QLD and WA rather than drop-shipping, and we ship Australia wide.
Manufacturer Catalogues, Diagrams & Part Numbers: Need exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues below.
Important Before Ordering: Please ensure you order correctly. Confirm this product is suitable before ordering. 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, these must be diagnosed and fitted by a qualified and experienced person. This is a special-order item.
Common search terms: R0531201, Zodiac R0531201, main housing 4wd white, vx65 iq main housing 4wd white, zodiac vx65 iq spare parts, zodiac pool cleaner spare parts, genuine zodiac parts australia, 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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R0531201
