1. When using an electronic timer, never mix old and new batteries, or standard alkaline and rechargeable batteries together. Doing so may result in accidental damage to the timer's internal electronics.
2. Make sure the washer is firmly in place in the coupling of your timer, before attaching to the faucet or to the hose. Washers are designed to prevent leaking during use. Filter Washers have a built-in screen that's designed to trap debris that may be in your hose before it accidentally may become lodged inside.
3. Electronic timers should always be attached directly to the faucet. These timers require water to be in the ON position at all times. Attaching an electronic timer to hose accessories, like a faucet splitter may cause damage to the splitter if under constant water pressure.
4. Never fully submerge, or spray water directly on to your electronic timer. While these timer's can become slightly wet during watering, fully submerging, or remaining wet for extended periods of time may cause accidental damage to your timer.
5. If attaching your manual timer directly to a sprinkler, be sure to shut water flow at the faucet when the sprinkler is finished watering. Then, release pressure of water at the sprinkler by turning the timer on. Some hoses may become damaged if left under pressure for an extended period of time.
6. Always be sure to check battery levels if you will be away from home or your electronic timer for extended periods of time.
7. Always detach, completely drain of water, and store your timer indoors before and during any freezing weather.
8. Only use timers outdoors, with cold water, attached to a standard garden hose, or outdoor faucet, and with water pressure less than 80 PSI, unless otherwise noted for the specific product you are using.
9. When not using your timer, safely store it inside a cool, sheltered area - such as the garage or shed. This will remove the timer from the elements, such as direct sunlight, and harsh weather, prolonging its lifespan.