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Those 4-inch drainpipes with the socks are very nice. I just use the perforated 4-inch drainpipes and cover the ends with some landscaping fabric. You don't need to cover the entire pipe with a sock. The soil will not seep into the perforations and clog the drain pipe as long as the ends are covered. For me, it saved a little money.
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Anyways, for those who don't know, the 4-inch drainpipe fills with water which acts as your water reservoir. Then you need to drill a hole in the sidewall, so the bottom of that hole is at 3 inches on the side. That gives you a 1-inch air gap so your plants don't drown.

Those wicking beds and planters are my favorite because it's impossible to overwater them and the water reservoir lasts for a long time. On my planters, I only have to refill the planter about once a month if we get average rainfall. One summer we had a terrible drought, and I had to refill the reservoir once a week. But the plants in the wicking beds never suffered as they had a constant supply of water. Very nice.
The only drawback to the wicking beds is that you have to invest in that drainpipe. However, there are a number of people who use empty plastic bottles and containers in their wicking beds and that works good for them. I'm saving up some half-gallon milk jugs to see if I can get them to work as well in the wicking planters as the drainpipe works. That would cut down the cost.