Zodiac Jandy® (Genuine) 50mm - 2" Three-way Valve

Name: Zodiac Jandy® (Genuine) 50mm - 2" Three-way Valve
Brand: Zodiac
SKU: W
Price: 136.00 AUD
Availability: InStock

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Zodiac Jandy® (Genuine) 50mm — 2" Three-way Valve

Genuine Zodiac Jandy® Pro Series NeverLube® 3-way diverter valve in 50mm. The standard choice for pool/spa changeover, suction selection and return splitting. The top section is interchangeable with every other Jandy valve body of the same size, including actuator-driven ones, so it can be automated later without recutting pipe.

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

Which size do I need? The dual-socket rule

Jandy valves are named for two pipe sizes because each port takes two. That is why this one is listed as 50mm and marked 2" x 2.5" on the body:

50mm (2") pipe fits inside the socket
63mm (2.5") pipe fits over the spigot

So a 50mm Jandy valve is the right choice if your pipework is 50mm — glue the pipe into the socket as normal. Measure your existing pipe rather than going by the number printed on the valve, because the printed size is a pair, not a single dimension.

NeverLube® — no greasing, ever

The diverter seal is a proprietary material that does not need lubricating for the life of the valve. Moulded in CPVC rather than PVC, so it handles the heat coming off a gas heater or heat pump return without softening, and shrugs off chlorine and salt.

Never requires lubrication
CPVC construction — chemical and temperature resistant
Serviceable, with spare parts available separately
Top section swaps onto any same-size Jandy body, including actuated valves
Adjustable stop lets you limit travel and balance flow

Automation

This valve is actuator-ready. Fitting a 24V valve actuator converts it to automatic changeover under a controller such as AquaLink RS, Viron Connect or Halo — the top section lifts off and the actuator drops straight on, so no replumbing is needed.

Genuine Zodiac part number

Jandy Pro Series part 4717. Genuine Zodiac stock, not a copy.

Other genuine Jandy valves in this range

Compatible alternatives

The Jandy pattern is used by several makers, and the bodies share a common footprint. The same pattern turns up on Astralpool, Praher, Pentair, Spas Direct, SpaPro and WWDG equipment pads across Australia.

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

Jandy valve, Jandy 4717, Zodiac Jandy valve, NeverLube valve, Never Lube valve, 50mm 3 way diverter valve, 50mm pool valve, 50mm spa valve, Jandy diverter valve, pool plumbing valve, SpaPro valve, WWDG valve.

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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