... Water Heater solar water heater with EN12975, SPF, Solar keymark, CE, ISO9001, well performance, env Separate Pressurized Solar Water Heater1. Jinyi separate pressurized solar water heater systemSolar Water HeaterSolar water ... , the solar water heater preheats water before it enters the conventional water heater. In one-tank systems, the back-up heater is combined with the solar storage ...