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Figure 10: Schematic Tankless Heater Piping
Table 1: Tankless Heater Ratings
Boiler Model
S350 S375
GPM PSID GPM PSID
RSA85 & 110 3 12 3½ 15
RSA110, 125 & 135 3¼ 16
3¾ 25
RSA125 & 135 3½ 19
Boiler Model
STD. #7524 OPT. #7530
GPM PSID GPM PSID
RSA170 3¾ 25½ 4 26½
RSA195, 240 & 285 4 29 4¼ 31