Madimack Inverchlor 40gm Cell
Madimack Inverchlor 40gm Cell is temporarily out of stock and will ship as soon as it's available.
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Don't Guess - Ask Us!
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Delivery and Shipping Info
Delivery and Shipping Info
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Warranty Information
Warranty Information
Madimack Inverchlor 40gm Cell
Madimack Inverchlor 40gm Cell is temporarily out of stock and will ship as soon as it's available.
Madimack InverCHLOR 40gm Replacement Cell
This is the genuine replacement chlorinator cell for the Madimack InverCHLOR 40gm salt and mineral chlorinator. It is the internal electrode only, supplied to renew a chlorinator whose existing cell has reached the end of its service life. The same cell also suits the matching SpaPro and WWDG x40 chlorinators.
- Warranty: Madimack's published schedule for the InverCHLOR cell is 4 years, or 10,000 hours, whichever comes first.
- Australian Consumer Law guarantees apply to every purchase, on top of any manufacturer warranty.
- FREE SHIPPING on all Madimack products over $149.00
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
Compatibility
- Madimack InverCHLOR 40gm salt and mineral chlorinator
- SpaPro x40 chlorinator
- WWDG x40 chlorinator
The gram rating must match your chlorinator. A 40gm cell fits 40gm units only and is not interchangeable with the 10gm, 20gm or 30gm cells.
What's Included
The internal electrode only. No cell housing, union nuts, lead, power supply or controller is included. If your housing is cracked or your controller has failed, those parts must be ordered separately.
Documentation: Specification Sheets & Updated Manuals | Up-to-Date Madimack Recommended Retail Prices
Looking for the complete unit instead of a replacement cell? See the Madimack InverCHLOR 40gm Salt & Mineral Chlorinator.
Frequently Asked Questions
How do I know which cell I need?
Match the gram output of your chlorinator, which is printed on the controller or on the label of the existing cell. This listing is the 40gm cell, so it suits an InverCHLOR 40gm unit.
Does this include the housing?
No. You receive the internal electrode only. The clear housing the electrode sits inside, along with the controller and lead, stays on your existing installation.
How long should a cell last?
Madimack's published warranty schedule for the InverCHLOR cell runs to 4 years or 10,000 hours of operation, whichever comes first. Actual service life depends on run hours, water balance and how well the cell is kept free of scale.
Will it fit my SpaPro or WWDG chlorinator?
Yes. This cell also suits the SpaPro and WWDG x40 chlorinators, which use the same electrode as the InverCHLOR 40gm.
What does the warranty cover?
The manufacturer warranty covers the cell itself on Madimack's published schedule of 4 years or 10,000 hours, whichever comes first. Your rights under the Australian Consumer Law apply in addition to that warranty.
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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