| Capacity (Gallons): | 119 |
|---|---|
| 1st Hour Delivery (Gallons): | 523 Gallons @ 140°F (180°F Boiler Supply Temp) 828 Gallons @ 115°F (180°F Boiler Supply Temp) |
| Heating Surface: | 42 Sq. ft. |
| Material: | Stainless Steel Tank, Plastic Jacket |
| Type: | Single Wall |
| Water Connection: | 1-1/2" |
| Application: | Plumbing |
| Height (Inches): | 72" |
| Diameter (Inches): | 32" |
| Weight (lbs): | 479 lbs |
Both the PP and the PT units are stainless steel tanks. The PP series has a stainless steel coil, while the PT as you have mentioned is a tank in tank design. The PT series has a lower pressure drop, which would help in systems where a larger pump is not a feasible option. The PP series is capable of greater output, and is also available in double wall configurations for regions where this is required by code.
Indirect water heaters do not have efficiency ratings. They are only as efficient as the boiler that heats the water they hold.
Yes, you do need a circulator pump, but you do not need an expansion tank specifically for the indirect water heater unless it's required by code.