Once you have all the water out, replace the line ends so the ends are sealed, you do not want dirt getting in through the ends. If you have removed the head assembly to be stored inside, you need to seal off the polytube end that was attached to the head assembly. Like before, we want to make sure no dirt will get into the system. If you do not remove the head assembly make sure to drain out the filter canister, valves and other components which may hold water. In the spring, make sure to flush out the system just like a new system. By doing so you should have no problems.
Filters should be checked and flushed on a regular basis. How often you should do this depends on how much debris your filter takes out of the water, in other words how dirty your water is. When your system is new check after a few days to see what kind of dirt has been caught in the filter. If there is really nothing go ahead and check again in a month or two. Just make sure to take out the screen and rinse it out under clean water when it needs it. This will keep your system running smoothly for a long time. Remember filtration is one of the most important parts of a drip system, treat it as such!
Drippers really do not need any kind of regular maintenance. There are models which come apart and can be cleaned. To do this take them apart and rinse under clean water. For stubborn dirt use an old toothbrush. Sometimes drippers will just get clogged up with hard water deposits or dirt and it almost always is easier to replace them. Most drippers will give you a few years of good service before any kind of problems arise. For example, we have very hard water here in San Diego and in our experience we have had drippers working for 6 years or more!
Microsprinklers are like drippers, as they do not require any special maintenance unless there is a problem. One of the things you will run into most often is the need to adjust the spray direction if they have moved. The other thing may be hard water deposits on the deflectors or nozzles. With some sprinklers this residue can be cleaned off, and others may need to replace occasionally. This does not mean you will have to do this every year or even two; it all depends on your water quality. Just check how they work every once in awhile.
Controllers need very little beyond taking them inside during the winter and checking the condition of the batteries. We suggest replacing the batteries every year just to make sure they will always be good. The health of your plants is worth the small investment!
Valves can be affected by debris in the water which could collect over time. This can be fixed by disassembling the valve and cleaning it. All the valves we sell can be taken apart and cleaned. We do suggest using the "blow-a-part" drawing in the instruction manual or finding the information page for the valve you purchased. This will show you the way the parts go back together. BE CAREFUL!! There are some very small parts and all of them are needed to make the valve work correctly.
The only time you need to do anything for winter is if your area freezes or has hard frost. What you need to worry about is the water freezing in any of the components. To fix this all you need to do is empty out the water from your system, this can be done any number of ways. Much of how you do this depends on your system configuration and your own preferences. Here are some basics. First you will want to open something on your head assembly or to disconnect it if you will be taking it inside for the winter. This is done to allow air into the system to replace the water you will be draining out. If you have a controller on your head assembly we would suggest taking the complete assembly inside a garage or storage area. Next open all the 1/2" polytube line ends and allow the water to drain out. If this will not drain all the water you can use a LOW PRESSURE air hose or you can even blow into the tube to push out the remaining water. You do not need to get every little bit of water out, just so the hose is empty. Remember water expands when it freezes, so it could split the tube if enough is left inside.