Reltech SunSol SS75 Solar Pump - Astralpool E170 Retrofit - 0.75hp
Reltech SunSol SS75 Solar Pump - Astralpool E170 Retrofit - 0.75hp is temporarily out of stock and will ship as soon as it's available.
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Reltech SunSol SS75 Solar Pump - Astralpool E170 Retrofit - 0.75hp
Reltech SunSol SS75 Solar Pump - Astralpool E170 Retrofit - 0.75hp is temporarily out of stock and will ship as soon as it's available.
The Reltech SunSol SS 75 Solar Pump 0.75HP pool pump is a high-quality AstralPool E170 retrofit pump, commonly used as a replacement for older AstralPool and Hurlcon pump models where a reliable single-speed pump is still preferred.
Australian made. Not a cheap Chinese knock-off.
The Reltech SunSol SS Series is Australian made and built for harsh local conditions. These are not cheap generic Chinese knock-offs. They are proper Australian-made pumps from a long-established manufacturer with deep roots in the local pool industry.
Reltech originally made the plastic wet-end parts for Hurlcon prior to Hurlcon becoming AstralPool. That history is one of the reasons the SS 75 is such a logical retrofit choice for older Astral and Hurlcon pump installations.
The SunSol SS Series uses the same wet-end technology as the PR Series, but with a more cost-effective motor. That makes it a good option where you want an Australian-made retrofit pump at a sharper price point, while still keeping the familiar wet-end design and plumbing compatibility.
If you are replacing an older AstralPool E170, E170, E 170, E170C, E 170C, Astral E-Series 0.75HP, or some related older Astral / Hurlcon pump models, the Reltech SunSol SS 75 is one of the main retrofit options in Australia.
Common Replacement / Compatibility References
This pump is commonly searched for or matched against the following model references:
- Reltech SunSol SS75
- Reltech SunSol SS 75
- Reltech SS75
- Reltech SS 75
- SunSol SS75 pump
- SunSol SS 75 pump
- SS75 pump
- SS 75 pump
- AstralPool E170
- AstralPool E 170
- Astral E170
- Astral E 170
- AstralPool E170C
- AstralPool E 170C
- E170 pump
- E 170 pump
- E170C pump
- E 170C pump
- AstralPool E-Series
- Astral E Series
- E Series pump
- Hurlcon E170 equivalent
- 0.75HP pool pump
- 3/4HP pool pump
- 0.75HP solar pump
- 3/4HP solar pump
Why Buy a Reltech Instead of a Cheap Generic Import?
- Australian made
- Built for Australian conditions
- Not a cheap Chinese knock-off
- Longstanding Australian pool industry history
- Proven retrofit option for older AstralPool and Hurlcon pumps
- Same wet-end technology as the PR Series
- Reliable, serviceable, and well known in the Australian market
- Sharper price point than the PR Series while still retaining Australian-made wet-end design
What This Pump Is Good For
- Standard residential pool filtration systems
- Small to medium swimming pools needing reliable flow and moderate head pressure
- Older Astral / Hurlcon pump replacements
- Solar pool heating systems
- Heat pump circulation duties
- Spas, plunge pools, and smaller in-ground pools
- Installations using either 40mm or 50mm PVC connections, depending on the setup
Why Many People Choose the SunSol SS 75 as an E170 Retrofit
- Popular replacement for E170 / E 170 / E170C pumps
- Australian-made quality
- Same wet-end technology as the PR Series
- Quiet operation and low operating costs
- Clear lid for fast visual basket checks
- Service-friendly union-style connections
- Good balance of performance, durability, and value
- Suitable for both 40mm and 50mm PVC pipe connection setups
Important Retrofit Notes
Retrofit does not always mean every old pump will be 100% identical in every measurement, cable position, or union arrangement. In this context it generally means this pump is commonly used to replace the same class and plumbing footprint of older pumps such as the E170 and related models, usually without major plumbing changes.
Online references show the AstralPool E170 / E170C is the 0.75HP E-Series model. Current Reltech seller and manufacturer material also places the SunSol SS 0.75HP in the same small-to-medium pool, spa, solar, and heat-pump circulation space, with direct retrofit references to Astral E-Series pumps. As always, check your existing pump label and plumbing before ordering.
That said, we still recommend checking:
- Union style and thread type
- Centreline height and available equipment space
- Pipe size at suction and discharge
- Electrical supply suitability
- Whether your old pump was a true 0.75HP unit
If you are unsure, compare your existing pump label and photos before ordering.
Specifications
- Model: Reltech SunSol SS75 / SS 75
- Series: SunSol SS Series
- Horsepower: 0.75HP
- Voltage / Phase: 240V / 1 Phase
- Full Load Amps: approx. 3.3A
- Flow Rate: approx. 170 LPM at 8m head
- Maximum Noise: approx. 58 dBA at 1 metre
- Approx. Overall Height: 341mm
- Approx. Width: 252mm
- Port Suitability: 40mm or 50mm pipe connection setup
- Power Lead: 2m flex with 3-pin plug
- Maximum Water Temperature: 45°C
- Warranty: 2 Year Limited Warranty
Construction & Features
- Heavy-duty one-piece pump body
- Corrosion-resistant engineering grade thermoplastic construction
- UV-stabilised materials for outdoor conditions
- Continuous-duty motor
- Low-noise and energy-efficient operation
- Extra-large strainer basket
- Easy-remove clear inspection lid
- Designed for low to medium head pressure applications
- Supplied with non-return flap for solar applications
- Self-aligning barrel unions for easier installation and servicing
Common Search Terms
This product may also be searched as:
Reltech SunSol SS75 pump, Reltech SunSol SS 75, Reltech SS75, Reltech SS 75, SunSol SS75 solar pump, SunSol SS 75 solar pump, AstralPool E170 replacement, Astral E170 retrofit pump, AstralPool E170C replacement, AstralPool E 170 replacement, E170 pump replacement, E170C pump replacement, E Series 0.75HP pump replacement, Australian made pool pump, 0.75HP pool pump Australia, 3/4HP solar pump, solar heating pump, heat pump circulation pump.
Who This Pump Suits
This pump suits pool owners wanting a quality Australian-made single-speed replacement for an older Astral / Hurlcon pump without dropping into a cheap unknown import. It is especially popular where people want a reliable, quieter, good-value pump for everyday filtration, solar heating, or heat pump circulation duties.
Please Check Before Ordering
Because older pumps were sold over many years and under multiple brand names, always check your existing pump label, horsepower, plumbing size, and overall footprint before purchase. Some older installations may have been modified over time.
If you are replacing an E170 / E170C / E 170 / E-Series 0.75HP style pump, this is one of the main retrofit options people look for.
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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PS RAP-10-91020