Prozone adds a non-compressor model to its offerings for the large and heavy-duty pool and spa market. The PZ2-4V operates using a Venturi bypass or external compressor only, and is suitable for a broad range of applications, including commercial, institutional and residential.The PZ2-4V is rated for large pools up to 50000 gal (189500 liters). It is also suitable for smaller-sized pools with higher than normal ozone requirements due to heavy bather loading, high temperatures, or other special conditions. The PZ2-4V is therefore ideal for hydrotherapy pools, swim spas, hotel and apartment pools, and many other heavy-duty settings