Raindrip PC8050B 2 GPH Pressure Compensating Drippers, Drip Irrigation Emitters for Drip Irrigation Gardening System, Maintains Constant Water Flow, 50-Pack, Green

These work perfect for my vegetable garden. Unless I change the set up or spots of my plants, these last for multiple years. I only ever really buy these when I change the set up or expand. Definitely get a puncher to help with getting them into the hose to save your thumbs but they haven’t seemed to get clogged and the have a consistent drip. This year we moved our garden but I was able to pull the old drips out of the old hose which saved me from having to buy all new ones.

Was thrilled with the price and delivery. Thought we had some defective pieces. Wrote customer support and got a polite and detailed response. They were very concerned and want feedback on our success. Our water pressure was too high, we thought the control unit and the drippers controlled pressure, do we reduced the flow into the system. All seems to be good. Will continue to monitor, but very impressed. Will buy again.

I have come to like this product, as well as the 1 GPH and 2 GPH equivalents - but despite the description, I don't think it is pressure compensating and so I think they should update the description. I came to doubt that after dissection revealed no moving diaphragm that I could recognize, only a tortuous path for slowing water. A few experiments suggest flow rate varies more or less linearly with pressure, producing advertised rate at about 25-30 psi (about 2 bar). In case my definition is wrong, let me say I rightly or wrongly expect pressure compensation to indicate a highly non-linear flow vs pressure relationship, since I would expect some mechanism to lower resistance in response to flow rate drop, which I did not see. Although apparent lack of pressure compensation took me by surprise, I actually prefer this because it lets me use them in series and parallel networks to achieve whatever I want. But don't worry about all that if you aren't familiar with those concepts (e.g. maybe from resistor networks in electronics) - I think anyone would be happy as long as you have a good 25-30psi regulator, as long as you arrange for total flow to be within spec for that regulator, and as long as you don't have more than a few meters of elevation change downstream of the regulator. (If you don't mind some math, larger elevation change is also fine so long as you account for 15psi (1 bar) change for every 10 meters of elevation change, and then derate advertised flow accordingly.) (Btw, 1 GPH is roughly 1ml/sec, which makes the math way easier.)

they are super tiny, release great amount of water, easy to apply. color coded for the water pattern. i love them

Works like it should. Good price.

I bought these on two occasions: First time, two years ago. Second time was last year. I bought these Rainbird 1/2 GPH drippers on both occasions because I had a difficult time finding my go-to drippers made by Dig corp either on Amazon or at my local big orange box store. I incorrectly assumed a simple piece of plastic that is built to drip a slight trickle of water should not cause any problems, but I was wrong. The ones made by Dig corp (they are brown in color) typically lasted about 3 to 5 years before I have to replace them. I realize that Tucson Arizona water might not be among the purest in the country, so it's a given that you'll expect eventual failure with button drippers clogging up as evidenced by even the Dig branded ones. However, when I first bought this Raindrip brand they seemed to last a pretty good while before they started to gradually reduce the amount of water coming out, with eventual failure. This started happening after about 12 to 18 months. By the time I noticed this I had already made my second purchase of these on Amazon (I still have the second, brand new package, sealed and unused -- they are going straight into the trash now since it's too late to return them for a refund). So I did a bit more digging and found that Amazon sporadically has the Dig corp ones in the 1/2 GPH flow rate (again, the brown ones) version on sale, but by third-party vendors and at an outrageously bumped up price. I also did a bit more research and found them for sale where I used to buy them locally, and at a reasonable price, but I had to special order them online for in-store pickup. This is certainly not as convenient as buying them online on Amazon and getting them within a couple of days, but at least I can now return to using the brand I like that lasts a lot longer locally, albeit with a couple of week wait time before I can pick them up in the store. Interestingly, I also bought some Raindrip button drippers in the 1 GPH and 2 GPH flow rates and these are still going strong after a couple of years. I attribute that to them taking a longer time to eventually clog up due to hard water because of the higher flow rates and associated larger internal button dripper components. I'll keep an eye on them and see how long they last. In the mean time, I can safely say that I will never buy the Raindrip branded 1/2 GPH drippers and whole heartedly recommend others consider my experience. The other sizes are TBD as far as performance goes. I will, however, go back to buying Drip Corp branded 1/2 GPH (end even the other sizes) even if I have to wait a while to get them in the mail or pick them up locally. My preference is almost always to buy from Amazon, but when I can't get what I want at a close to reasonable price I'll take the long and winding road.

The bad: They break if you step on them or drop something heavy on one. The good: They are amazingly consistent compared with some other adapters I tried. I use the 1/2 gallon per hour adapters. I'm up to about 150. I use 30 PSI pressure regulators and plug the drippers directly in 1/2 inch lines. Then I use 1/4" tubing to deliver the water to the individual plants. This arrangement keeps the 1/4" tubing pressure at 0. I like the 1/2 gallon per hour because it lets me set the timer to a reasonable length of time (I still have my flower box timers set to 3m per 24h, which is too short to control.) These are operating in a near desert environment with temps at or above 100F, and many are in direct sunlight. They are holding up fine so far.

I purchased these 1/2 gph emitters to use in my wife's potted plants that are adjacent to her raised beds that use tape irrigation that drip at basically the same rate. These emitters allow a balanced automated watering system since their drip rate is basically the same as the drip tape used in the beds. And in general, for the ones that worked, I was very satisfied with them. However, 7 out of 50 failed to drip properly and generally just emitted a steady stream like there was no flow resistance at all. Since I had already installed most of the emitters while discovering which ones failed, it did not make sense to send them all back for a refund/replacement.....also since it is likely that each batch will have a certain percentage of failures, so getting another set will just have similar problems. So to me, they were cheap enough that I just kept this batch. But I of course don't like that I have to eat the 14% failure rate in my costs.