collectors will be greatly impaired. Lop trees, or clean collector glass. Maximum electrical energy saving can be achieved with careful planning of hot water usage. Should you, at any time, feel your electricity account for hot water is too high, we suggest you check the following points: Are you using more hot water than you think? Are any of your hot water taps dripping or hot water pipes leaking? Even a small leak can waste a surprising amount of hot water. Replace faulty tap washers, and have your plumber rectify any leaking pipe work. Consider if you have recently increased your hot water usage and check if there has been any increase in electricity tariffs since the last account. The electricity tariff to which your solar water heater is connected, will play an important role in the overall effectiveness of the system. It is important that you are aware of this tariff to enable you to take full advantage of the boosting period, i.e. Domestic/Continuous, Off Peak, Extended Off Peak. For types of tariffs, refer to "How Your Water Heater Works" in the Domestic Solar Owner's Guide and Installation Booklet. The difference between a premier solar cylinder and a solar tank is that the premier solar cylinder is indirect (the hot water and glycol collector fluid do not mix). The solar tank is a direct cylinder where the water is the same that is in the hot water cylinder (it mixes). A low pressure cylinder is not suitable for a