Zodiac Titan and Emaux O-Ring for Diffuser 50mm Top Mount Valve - W02011005
Zodiac Titan and Emaux O-Ring for Diffuser 50mm Top Mount Valve - W02011005 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.
Delivery and Shipping Info*
Delivery and Shipping Info*
Free Shipping over $99 for most products. Choose Express Post for fastest shipping!
Zodiac Titan and Emaux O-Ring for Diffuser 50mm Top Mount Valve - W...
Zodiac Titan and Emaux O-Ring for Diffuser 50mm Top Mount Valve - W02011005 is temporarily out of stock and will ship as soon as it's available.
Zodiac Titan and Emaux O-Ring for Diffuser — 50mm Top Mount Valve
Genuine replacement o-ring that seals the 50mm (2") diffuser inside the bottom body of the top mount multiport valve. One o-ring is fitted per valve. This part is No. 15 in the Zodiac Titan multiport valve exploded diagram.
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
Specifications
| Zodiac Part Number | W02011005 |
| Emaux Part Number | 02011005 |
| Manufacturer Description | O-Ring for Diffuser |
| Diagram Reference | No. 15 (Zodiac Titan) / No. 13 (Emaux MPV02) |
| Assembly | 50mm Top Mount Multiport Valve (W88280306 / Emaux MPV02) |
| Seals | 50mm Diffuser (W01013030) |
| Quantity Per Valve | 1 |
Fits
- Zodiac Titan fibreglass sand filters — ZT700B, ZT800, ZT900
- Emaux V-Series fibreglass sand filters — V700B, V800, V900
- Emaux MPV02 2.0" six-way top mount multiport valves
The Zodiac Titan is the Emaux V-Series filter supplied under the Zodiac brand. The part numbers are the same with the leading "W" removed — Zodiac W02011005 is Emaux 02011005. Note that Emaux numbers its own diagram differently: this o-ring is No. 15 on the Zodiac Titan diagram but No. 13 on the Emaux MPV02 sheet.
Check Your Valve Size Before Ordering
This is the diffuser o-ring for the 50mm / 2" top mount valve. The 40mm / 1.5" valve uses a different diffuser o-ring — part number W02011001 (Emaux 02011001). Confirm your valve size before ordering.
Related Parts
- W02011006 — O-Ring, 50mm MPV Lid (No. 7)
- W02011022 — O-Ring, Valve Rotor (No. 8)
- W01021002 — Valve Rotator 50mm (No. 10)
- W02311003 — Spider Gasket (No. 11)
- W01013027 — 50mm Valve Bottom Assembly (No. 12)
- W01013030 — 50mm Diffuser (No. 14)
- W88280306 — 50mm Top Mount Valve (complete)
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
This part is No. 15 in the multiport valve diagram on that page.
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.
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 |
Payment & Security
We accept: Visa, Mastercard, Amex, Apple Pay, Google Pay, ShopPay, Paypal, Zip, Afterpay
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
W02011005
