... installation 4).More safety 150L water tank for hot water heater(WS150F) 1. Advantage of Water Tank:1.1 Without copper pipe inside ... economic, and more durable;1.2 No wire between water tank and main unit ensure safe;1.3 Series of small ... tank, convenient installation, more space saving;2. Water Tank SpecificationCapacity: 100L, 150L, 200L, 300L, 400L3. Data sheet 150L water tank for hot water heater ...