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Used with the Freshwater III High Output Ozonator, and produced by Watkins.
The injector works by vacuuming while water passes through it. This then ensures that ozone gas present is siphoned into the plumbing system of the spa.
74078 Ozone Injector, Black is for the following models:
| Make | Model | Date Range |
| Tiger River | Bengal | 1997-2010 |
| Tiger River | Siberian | 1997-2004 |
| Tiger River | Caspian | 2003-2010 |
| Tiger River | Sumatran | 1994-2010 |
| Tiger River | Tondi | 1995-1996 |
| Tiger River | Bengal Model MM | 2005-2010 |
| Tiger River | Khyber | 1994-1996 |
| Tiger River | Manora | 1994-1996 |
| Tiger River | Tondi PH 220 | 1996 |
| Tiger River | Manora MH 220 | 1996 |
| Caldera | Tahitian | 2001-Current |
| Caldera | Niagara | 2001-Current |
| Caldera | Geneva | 2001-Current |
| Caldera | Cantabria | 2009-Current |
| Caldera | Hawaiian | 2002-2010 |
| Caldera | Kauai | 2001-2010 |
| Caldera | Moorea | 2006-2010 |
| Caldera | Salina | 2011-2015 |
| Caldera | Makena | 2013-2015 |
| Caldera | Martinique | 2001-2015 |
| Caldera | Aspire | 2004-2008 |
| Caldera | Elation | 2003-2010 |
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