Madimack pH Doser Add-on - for Inverchlor
Madimack pH Doser Add-on - for Inverchlor 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 pH Doser Add-on - for Inverchlor
Madimack pH Doser Add-on - for Inverchlor is temporarily out of stock and will ship as soon as it's available.
Madimack pH Doser Add-on for InverCHLOR Chlorinators
The Madimack pH Doser is an acid feeder add-on for the Madimack InverCHLOR chlorinator range. There are no probes to buy, calibrate or replace: the doser uses an advanced algorithm to calculate how much acid your pool needs. It keeps pH in balance automatically, which protects the cell and keeps the water clearer.
- RRP $362.96 is the manufacturer's recommended retail price.
- Warranty: Madimack's published schedule for the pH Doser is 1 year. Registration within 30 days of installation is required.
- 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
Note: Cannot be used as a standalone unit. It must be connected to a Madimack chlorinator.
Documentation: Specification Sheets & Updated Manuals | Up-to-Date Madimack Recommended Retail Prices
Key Features
- Acid feeder add-on for the Madimack InverCHLOR chlorinator range
- No probes required, so there is nothing to calibrate or replace
- Advanced algorithm calculates the acid dose for your pool
- Controlled through the connected Madimack chlorinator
- Improves water balance and helps keep the pool water clearer
What's in the Box
Madimack pH Doser, 50mm Injection Tee, 50 to 40mm Reducing Bushes, Spare Squeeze Tube, Lubricant, Suction Screen, 5m Dosing (Acid) Tubing, Comms Cable.
Warranty
Madimack's published schedule for the pH Doser is 1 year. Registration within 30 days of installation is required.
Australian Consumer Law guarantees apply to every purchase, on top of any manufacturer warranty.
Frequently Asked Questions
Can the pH Doser be used on its own?
No. It cannot be used as a standalone unit and must be connected to a Madimack chlorinator.
Does it need a pH probe?
No. The doser uses an advanced algorithm to calculate how much acid your pool needs, so there are no probes to buy, calibrate or replace.
What is included with the doser?
The kit includes the pH Doser, a 50mm injection tee, 50 to 40mm reducing bushes, a spare squeeze tube, lubricant, a suction screen, 5m of dosing (acid) tubing and a comms cable.
Which chlorinators does it suit?
It is designed as an add-on for the Madimack InverCHLOR range, including the InverCHLOR 100, 200, 300 and 400.
What does the warranty cover?
Madimack's published schedule for the pH Doser is 1 year, and registration within 30 days of installation is required. Australian Consumer Law guarantees apply on top of that.
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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