DXD Spa Jet Pumps - See Listing
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*
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DXD pumps are mainly found on Chinese imported spas. As far as we are aware, we cannot find any electrical approvals on these pumps, so they cannot be sold. The following is a list of suitable replacements in most cases*.
- DXD-300E - .35hp - use JA50
- DXD-310 X - .5hp (400W) - use JA50
- DXD-310 - 1.0hp - use JA100
- DXD-320E - 2.0hp - use LP200
- DXD-320F - 2.0hp - use LP200
- DXD-320G - 2.0hp - use LP200
- DXD-20A - 2.0hp - use LP200
- DXD 20C - 2.0hp - use LP200
- DXD-30A - 3.0hp - use LP300
- DXD-30C - 3.0hp - use LP300
- DXD-40A - 4.0hp - use LP300
- DXD-40C - 4.0hp - use LP300
- DXD-320ES - 2.0/0.5hp - use WP200-II
- DXD-320FS - 2.0/0.5hp - use WP200-II
- DXD-330AS -3.0/0.6hp - use WP300-II
- DXD-320AS - 2.0/0.5hp - use WP200-II
- DXD-325AS - 2.0/0.5hp - use WP200-II
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DXD-20AS - 2.0/0.2hp - use WP200-II
- DXD-20CS - 2.0/0.2hp - use WP200-II
- DXD-30AS - 3.0/0.2hp - use WP300-II
- DXD-30CS - 3.0/0.2hp - use WP300-II
- DXD-330A - 3.0hp - use LP300
- DXD-330C - 3.0hp - use LP300
- DXD-330D - 3.0hp - use LP300
- DXD-340A - 4.0hp - use LP300
- DXD-340C - 4.0hp - use LP300
*Notes: We cannot guarantee direct fits due to the number of variations. In some cases the lead may need changing or plumbing may need changes done by a qualified person.
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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