WizzStone-Combo
Contents, assembly, cleaning, and CO₂ flow rate setup for the WizzStone-Combo ceramic carbonation stone and carrier.
The WizzStone-Combo is a stainless steel carrier with a built-in thermowell that holds a 16 in ceramic carbonation stone. Read this page before first use. BrewWizz also has Watch and Learn videos at brewwizz.com.
The ceramic stone fitted in the WizzStone-Combo carrier.
What's in the box
| Qty | Item |
|---|---|
| 1 | WizzStone-Combo carrier with built-in thermowell |
| 1 | 16 in ceramic carbonation stone |
| 1 | Cleaning brush |
| 1 | Bottle of FDA-approved lubricant |
| 5 | Stainless steel hairpin cotter pins |
| 16 | Spare orange O-rings |
The WizzStone-Combo kit. The carrier is shown here fitted with a CO₂ connection, isolation valve, and check valve, which are covered in Carbonation Stone Check Valve.
Ceramic carbonation stone
The ceramic stone is designed specifically for the WizzStone-Combo.
| Specification | Value |
|---|---|
| Length | 16 in |
| Pore size | 0.5 micron |
| Construction | Thick wall ceramic |
| Tested pressure | Up to 200 psi without rupture or fracture |
| Recommended CO₂ flow | 16 CFH or less on the FizzWizz |
At flow rates of 16 CFH or less, the stone produces very fine bubbles and high CO₂ transfer.
Ceramic is not resistant to sudden impact. Dropping the stone will damage it. The stone and carrier are round and will roll off a table, so never leave them unattended on a flat surface. Ideally, store the WizzStone-Combo in its own sanitiser bucket.
Assembly
The hairpin cotter pin holds the assembly together. It must be fitted every time the WizzStone-Combo is assembled.
Wear gloves whenever you handle the ceramic stone.
Insert the stone into the fixed end
Keeping the stone level with the carrier, slide it into the fixed end cap. Do not lever the stone up and down. It should bottom out against the fixed end cap, with a gentle twist if needed. When it is fully home, the O-rings are no longer visible.
The double orange O-rings on the end of the ceramic stone.
Keep the stone level with the carrier as you slide it in. Don't lever it up and down.
Fit the loose end cap
Slide the loose end cap onto the square section of the carrier, then gently slide it onto the other end of the stone. Do not force it.
Sliding the loose end cap along the square section of the carrier onto the stone.
Fit the cotter pin
Insert the hairpin cotter pin through the loose end cap to lock the assembly together. Check that it is in place.
The hairpin cotter pin correctly fitted to the loose end cap.
If the stone or end cap is tight:
- Apply a very small amount of the supplied lubricant (about a quarter of a pea) to the O-rings.
- Try rotating the stone in the carrier and fitting it again.
About a quarter of a pea of lubricant is enough.
Pinched O-rings: an O-ring may pinch or get slightly cut during assembly. Because it is a double O-ring seal, minor damage should not cause a leak. Make a note and replace the damaged O-ring before the next use. Spares are supplied.
Disassembly
Remove the cotter pin
Pull out the hairpin cotter pin from the loose end cap.
Push off the end cap
Grip the loose end cap between two fingers and push with your thumb to release it from the stone.
Grip the end cap between two fingers and push with your thumb.
The end cap released, with the stone's O-rings visible.
Cleaning
The ceramic stone must be cleaned after every use. Its thick wall and small pore size make it very prone to clogging. BrewWizz offers two cleaning methods.
Torpedo method
The torpedo method uses a tri-clamp housing that lets cleaner be forced through the ceramic stone.
The torpedo housing, with tri-clamp ends and a quick-connect fitting.
Recommended cycle:
- Caustic cleaner such as PBW
- Caustic cleaner such as PBW (second pass)
- Rinse
- Sanitiser, or store the stone in a sanitiser bucket after cleaning
Ultrasonic method
Ultrasonic cleaning gives the best results for keeping ceramic stones clean.
Recommended cycle:
- 20 to 30 minutes in caustic cleaner such as PBW
- 20 to 30 minutes in clean water
- Store in sanitiser
See Ultrasonic Stone Cleaner for how to use the cleaner.
Setting the CO₂ flow rate
Use the CO₂ flow rate calculator in the BrewWizz app to find the right flow rate for the stone.
The BrewWizz app.
Open the calculator
In the BrewWizz app, go to Calculation and select CO₂ Stone flow rate calculator.
Enter the stone details
Set Carbonation stone length to 16 and Stone porosity to Best (0.5 to 0.2 micron).
Selecting a carbonation stone length of 16 in.
Enter the product details
Enter the height of product over the stone in inches and the approximate finish gravity of the beverage.
Set the flow controller
The app shows a Recommended flow rate in CFH MAX. Set the flow controller on the side of the FizzWizz to this value. The WizzStone-Combo supports flow rates up to 16 CFH.
Example result: a 16 in stone, Best porosity, 65 in of product, and a finish gravity of 1.006 gives a recommended maximum of 15.83 CFH.