Astralpool ICI Gas Heater Spare Parts List
Astralpool ICI Gas Heater Spare Parts List is temporarily out of stock and will ship as soon as it's available.
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Warranty Information
Astralpool ICI Gas Heater Spare Parts List
Astralpool ICI Gas Heater Spare Parts List is temporarily out of stock and will ship as soon as it's available.
Astralpool ICI Gas Heater Spare Parts List
Spare and replacement parts for Astralpool ICI 200 and ICI 400 gas pool and spa heaters. Use the diagram images above to find the item number, then click a linked part below to view and buy it. Parts without a link can usually be ordered: contact us with your heater model and serial number.
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
| Item | Description | Part No. | Qty |
|---|---|---|---|
| 1 |
User Panel PCB / Thermostat Control Panel Also: PCB ICI 400 & B Model (SP781665400) | PCB ICI 200B (SP781665200B) |
78166 | 1 |
| 2 | Fan Plate - All Models | 9189430 | 1 |
| 3 | Fan Gasket / Gasket Fan Plate - All Models | 78135 | 1 |
| 4 | Fan Plate Insulation - All Models | 1115068 | 1 |
| 5 | Burner - All Models (Burner Replacement Kit) | 78409 | 1 |
| 8 | Front External Panel - All Models | 1115114 | 1 |
| 9 | Flame Rod with Sight Glass - All Models | 77140 | 1 |
| 10 | Pressure Switch - All Models | 71580 | 1 |
| 11 | Pressure Switch Tube - All Models | 1115124 | 1 |
| 12 | Crossover Return Header | SP21411 / SP20411 | 1 |
| 13 | In/Out Header - All Models | SP20410 | 1 |
| 14 | Water Shield - All Models | 1115120 | 1 |
| 15 | Gas Inlet Masking Bracket - All Models | 1115119 | 1 |
| 16 | Bolt M8 x 112 - Square Washer | 71850 | 2 |
| 17 | Side Panel - In/Out Lower - All Models | 1115109 | 1 |
| 18 | Header Hole Filler Plate | 918007 | 2 |
| 19 | Lower Side Panel - All Models | 1115118 | 1 |
| 20 | Aluminium Base - All Models | SP78126 | 1 |
| 21 | Drain Hose | SP78164 | 1 |
| 22 | Plastic Base - All Models | 14600014 | 1 |
| 23 | Plastic Top Cover - All Models | 14600016 | 1 |
| 24 |
Ignition Module (HSI) - All Models Also: Ignition Module V2 (SP79138) |
781382 | 1 |
| 25 |
Combustion Fan RG148 - ICI 400 Combustion Fan RG130 - ICI 200 (78131) |
78132 | 1 |
| 25 | Water Shield - All Models | 1114690 | 1 |
| 26 | Gasket - Fan to Plate | 78135 | 1 |
| 27 | H.S.I. Hot Surface Igniter - All Models | 726067 | 1 |
| 28 | Air Pressure Switch | 77139 | 1 |
| 29 | Air Pressure Mount Bracket - All Models | 1115129 | 1 |
| 30 | Fibre Gasket | 78141 | 1 |
| 31 | Water Shield - Left Side | 1114689 | 1 |
| 32 | External Panel - Left Side | 1115115 | 1 |
| 33 | Header Bolts M8 x 25mm | 40152 | 16 |
| 34 | Flue Top Cover Outdoor - All Models | 1115126 | 1 |
| 34 | Flue Top Cover Indoor - All Models | 1115600 | 1 |
| 35 | Return Header | 71049 | 1 |
| 36 | Indoor Flue Spigot | 1115110 | 1 |
| 37 | Gasket - Tube Seals - Bag of 9 | 76121 | 4 |
| 38 | Flue Base - All Models | 1115103 | 1 |
| 39 | Heat Exchanger 400 & Insulation | SP111552 | 1 |
| 40 | Flue Tube - All Models | 78808 | 1 |
| 41 | Rear Enclosure Crescent Panel - All Models | 1115102 | 1 |
| 42 | Gasket | 15125013 | 1 |
| 43 | External Rear Panel - All Models | 1115101 | 1 |
ICI Parts Not Shown on the Diagram
- ICI Top Cover with Visor 78617 (Viron version: 78615)
- Hi Limit 175C Flue 78162
- Inlet High Limit Switch 42-45C - F2 error
- Outlet High Limit Switch 52-55C - F2 error
- Hi-Limit Switch Kit - VDE (both switches with brass plugs)
- High Limit Brass Plug 71060 - commonly corrodes
- Brass Temperature Sensor Well
- Temperature Sensor - Thermistor Lead
- Gas Valve - ICI 400 (Natural Gas / LPG)
- Natural Gas to LPG Conversion 10390
- Loom - High-Limit SP79142
- Loom - Controller 24838
- Flue Front Bracket 1115105
- Insulation ICI 400 Firebox HSI Side 1115096 | Firebox L/R 1115097 | Firebox Side 1115099
- ICI Indoor Flue Kit 78270
- Major Service Kit - ICI 400
- Barrel Union Nuts & Tails - 50mm / 40mm
All other parts may be available. Contact us for more info.
Please don't order this listing, as the diagrams are not for sale.
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
To the layperson, plumbing sizes and their names can be confusing due to the nominal sizes and naming conventions used.
This is not something we made up. Plumbers and manufacturers have used nominal (meaning ‘by name only’) sizing for decades.
Simply put, in plumbing, named sizes are often not the actual measurements of the pipe, fitting, or part. A PVC pipe called “50mm” or “2"” does not measure 50 mm anywhere. Instead, it follows nominal sizing, an internationally-standardised naming system.
Almost all fittings we use in the pool & spa industry use “pressure PVC” pipe & fittings. Do not confuse with “DWV” or other pipe & fittings and their names and sizes.
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 |
To reiterate, these are nominal sizes and are designed to fit matching fittings — not to measure 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 and other plumbing areas 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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