A comparison of Sprudelux models
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| SPRUDELUX | Sprudel-Lok | Inox | Blue Diamond | Red Diamond | Nuovo |
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| Model | Under-sink unit | Under-sink unit | Under-sink unit | Under-sink unit | Under-sink unit |
| Filtration principle | Without a filter unit | Without a filter unit | Without a filter unit | Without filter unit | Reverse osmosis filtration (direct flow) |
| Motor / Pump | Battery-free membrane pump | Booster pump 220V | 24V booster pump | 24V booster pump | Water-cooled industrial pump 220V / 180W / 50Hz |
| Fitting | Includes 1-way valve or 3-way valve | Additional 3-way fitting or 5-way fitting | Includes additional 3-way plastic valve with touch buttons | Includes an additional 3-way plastic valve with touch buttons | 3-way auxiliary valve or 5-way valve |
| Compatibility with other fittings | No | Yes | No | No | Yes |
| Distance (system – fitting) |
approx. 1 m | approx. 1 m | 75 cm | 75 cm | up to 5 m (Can be installed in a cellar or storeroom) |
| Compressor | - | Water-cooled, no heat generation |
Air-cooled, adequate air circulation required, fan at the rear | Air-cooled, adequate air circulation required, rear fan | Water-cooled, no heat generation |
| Carbonator | Stainless steel Inox 1 L | Stainless steel Inox 2.5 L | Plastic 4 L | Plastic 4 L | Stainless steel Inox 2.5 L |
| Aqua-Stop | External, included | Internal | Internal | Internal | Internal |
| Types of water available | carbonated, at room temperature | 1. Still, at room temperature 2. Still, chilled 3. Chilled and carbonated |
1. Still, at room temperature 2. Still, chilled 3. Chilled and carbonated |
1. Boiling hot 2. Still, chilled 3. Chilled and carbonated |
1. Reverse-osmosis filtered, still, at room temperature 2. Reverse-osmosis filtered, still, chilled 3. Reverse-osmosis filtered, chilled and carbonated |
| Flow rate for sparkling water | 1 L/min | approx. 1 L/min | 2–3 L/min | 2–3 L/min | 1 L/min |
| Performance | No power required | max. 100 W | max. 100 W | max. 100 W | max. 180 W |
| Dimensions W x H x D | 110 x 200 x 300 mm | 160 x 380 x 400 mm | 230 x 390 x 360 mm | 230 x 390 x 360 mm | 248 x 386 x 390 mm |