Jet Pump (1-speed) Inline Cable Connector / Joiner - IP68 Weatherproof
Jet Pump (1-speed) Inline Cable Connector / Joiner - IP68 Weatherproof is temporarily out of stock and will ship as soon as it's available.
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Jet Pump (1-speed) Inline Cable Connector / Joiner - IP68 Weatherproof
Jet Pump (1-speed) Inline Cable Connector / Joiner - IP68 Weatherproof is temporarily out of stock and will ship as soon as it's available.
The Inline Cable Connector / Joiner is an IP68 weatherproof solution for joining, extending, or replacing power cables on spa and pool equipment. It is the ideal fix for converting older gear fitted with obsolete plugs — including Mini JJ (Mini J&J), Gecko Aeware in.link, and other discontinued cable styles that are no longer available. Cut the old cord near its existing plug, then join your new equipment straight to this connector.
This 9–12mm version (SKU ec-3c-12) is the single-speed jet pump option, sized for the larger 3-core cable typically used on spa circulation and single-speed jet pumps.
When a single-speed jet pump arrives with a Mini J&J or Gecko in.link plug that no longer matches your control pack — or the original socket has been discontinued — there is no need to replace the entire pump. Cut off the redundant plug, strip the 3-core cable, and terminate into this joiner to wire the pump straight into your existing cable run. It also works as a general-purpose extender or joiner for 3-core cable in the 9–12mm range.
Not sure which plug or lead you have? See our guide to spa & hot tub plug and lead types (Mini JJ, C38 and more).
Commonly used on spa equipment from SpaPro, WWDG, Sapphire, Oasis, Vortex and many imported brands.
Specifications:
- Typical use: single-speed jet pumps
- Configuration: 3-core
- Rating: 16A
- Cable diameter: 9–12mm
- Ingress protection: IP68 weatherproof
- SKU: ec-3c-12
Three types are available to match your cable size and equipment:
- Blower / Ozone / Circ Pump — 3-core, 16A, 5–8mm cable
- Single-Speed Jet Pump — 3-core, 16A, 9–12mm cable (this product)
- Two-Speed Pump — 4-core, 25A, 10–14mm cable
Fitting instructions:
- Ensure cables are stripped sufficiently and held tight with the terminal latches closed.
- Tighten with spanners to ensure waterproofing and strain relief, and to prevent unscrewing by hand. Do not overtighten.
- Can be silicone gel-filled for additional moisture protection.
Construction:
- Waterproof IP68 power cable joiner
- Screw-type or spring-loaded terminals
- Nylon glass-fibre reinforced PA66+GF (V0)
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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ec-3c-12