Astralpool ECA 550 Sand / Media Filter — 23" 40mm MPV — Pickup Carrum Downs, Vic Only
Astralpool ECA 550 Sand / Media Filter — 23" 40mm MPV — Pickup Carrum Downs, Vic Only is temporarily out of stock and will ship as soon as it's available.
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Astralpool ECA 550 Sand / Media Filter — 23" 40mm MPV — Pickup...
Astralpool ECA 550 Sand / Media Filter — 23" 40mm MPV — Pickup Carrum Downs, Vic Only is temporarily out of stock and will ship as soon as it's available.
Astralpool ECA 550 Sand / Media Filter — 23" 40mm MPV
The Astralpool ECA 550 is the entry model in Astralpool's Australian-made ECA filter range, built for high strength, long life, efficient backwashing and reliable filtration. The 23" (589 mm) tank with 40mm multiport valve suits small to medium swimming pools, and uses the same manufacturing processes found in Astralpool's larger filter range.
- Physically Stocked, unlike most "drop-shipping" websites.
- Genuine Authorised Dealer
Documentation: Brochure | Manual
Warranty: 10 Years Tank | 1 Year Parts | 1 Year Labour
*Subject to change - Check Warranty Details Here
- Authorised Astralpool Dealer.
- Spare Parts are easy!
- Warranty is easy!
Glass Media Required — ECA 550
- Coarse: 2 x 15kg Coarse Glass Media
- Fine: 4 x 15kg Fine Glass Media
Astralpool ECA Filter Features
- Australian designed and made
- Injection moulded high strength tank
- High strength materials for long service life
- Suitable for in-ground and above-ground pools
- Efficient filtration for small and medium pool applications
- 10 year warranty on tank
Specifications
| Product | ECA 550 |
|---|---|
| Part Number | 10096 |
| Tank Diameter | 589 mm (23") |
| Filter Area | 0.23 sq m |
| Port Size | 40 mm |
| 6 Hour Turnover | 65,000 litres |
| 8 Hour Turnover | 85,000 litres |
| Glass Media Coarse | 2 x 15kg bags |
| Glass Media Fine | 4 x 15kg bags |
| Height | 930 mm |
| Width | 589 mm |
| Shipping Weight | 13 kg |
| Maximum Pressure | 175 kPa |
| Maximum Water Temperature | 40°C |
Other Astralpool Sand & Media Filters
ECA Range (Entry-level): ECA 550 – 23" (this filter) | ECA 650 – 26"
CA Range (Mid-level): CA 280 – 26" 40mm | CA 300 – 26" 50mm | CA 340 – 29" 50mm | CA 400 – 32" 50mm
APV Range (Top-level Fibreglass): APV 650 – 25" | APV 700B – 28" | APV 800 – 32" | APV 900 – 36"
Glass Media: 15kg Coarse Glass Media | 15kg Fine Glass Media
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
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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10096