Jandy® (Genuine) 40mm - 1.5" Two-way Valve
Jandy® (Genuine) 40mm - 1.5" Two-way Valve is backordered and will ship as soon as it is back in stock.
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Jandy® (Genuine) 40mm - 1.5" Two-way Valve is backordered and will ship as soon as it is back in stock.
Jandy® (Genuine) 40mm 2-way Valve
A Sturdy Valve That Easily Disassembles for Clearing Debris
Jandy 2-way Valves are the leading valves used in pools and spas. All top sections can be swapped with any other Jandy valve body. This also includes actuator motorized valves. All Jandy valves are serviceable and have parts available. Check valves are spring-loaded to ensure water stays where it's supposed to!
Jandy Pro Series Valves with Never Lube Technology – the Industry's Best-Selling Valve for Over 20 Years
The Never Lube Valve is completely maintenance-free and built from the toughest CPVC material. It can withstand extreme chemical and temperature fluctuations without ever leaking, cracking or breaking. It's available in 1.5" x 2", 2" x 2.5", and 2.5" x 3" sizes for easy use in conjunction with the Jandy Valve Actuator for automatic operation. The large 2-port and 3-port diverter valves are both 2.5" x 3", making them the largest valves on the market.
Features
- Large 2.5" x 3" dimension designed to easily connect with Jandy Pro Series 3HP Stealth™ Pumps
- Included placards label the valve position
- Never requires lubrication
- Adjustable-stop feature allows for flow adjustment
- Both diverter valves can handle flow rates up to 170 GPM with minimal head loss, making them great for spas and water features that require high flow rates
Technical Details
- Designed for easy automation
- Made from durable CPVC
- Proprietary Never Lube technology with lifetime guarantee
- Available in 1.5" x 2", 2" x 2.5", and 2.5" x 3" sizes
Specifications (Approx):
- Pipe: 40mm Pressure PVC (~48mm)
- End-to-End Width: ~165mm
- Height: ~145mm
In plumbing, named sizes are not the actual measurements. A pipe called “50mm” or “2"” does not measure 50 mm across. Instead, it follows nominal sizing, an internationally-standardised naming system.
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 |
These are nominal sizes and are designed to fit matching fittings — not to measure exactly 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 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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