If you need a larger water tank, Sioux offers the NextGen HWP with a 1MBTU/Hr WH Series water heater and a 1,000 gallon atmospherically vented water tank. A single stage centrifugal pump with a 3-HP motor is included for circulation through the heat exchanger and a single stage centrifugal pump with a 7.5-HP motor capable of 180 GPM @ 90 ft of head for the discharge pump. Connect the inlet and outlet water, plus utilities, and you are ready to make hot water.
The WHC models come with a carbon steel heat exchanger and storage tank. The WHS models come with a stainless steel heat exchanger, storage tank, and non-ferrous wetted parts.