GARDENA OS 140 8223-20 Pop-Up Square Sprinkler Irrigation System for Square and Rectangular Areas up to 140 m² Floor Level Mounted

Model OS140 by Gardena.Review written 6 months after installation.3/4” female pipe thread on bottom.+/- 28 PSI minimum to pop up.Excellent design & built very well.Bigger than you may think.Not as much of an eyesore as you may think.I bought 9 of these between two orders, which shipped to the US from Amazon UK and arrived a lot faster than estimated at checkout (about a week instead of three weeks). I’m very happy with the service.These are great sprinkler heads and a lot more fun than the standard Rotors or Sprays normally installed for US homes. The coverage area is very large: about 50 feet forward and back by 30 feet side to side (at approx 40PSI operating pressure).The width of the spray is adjustable and you can separately adjust left and right sides as needed, and it is easy to set forward and back limits. There is also a flow rate valve that adjusts the distance of the spray, though you would probably only lower this if your pressure was so high that the spray is turning into a mist.The spray is a nice “light shower” emulating a gentle rain. It does take longer to properly saturate an area but it gives the lawn more time to absorb the water, so there’s little or no runoff.These do not work very well on windy days because they have a rather tall spray, though they seem to do fine in a light breeze. I would also not recommend these sprinklers for odd shaped areas where the bordering space should not get wet since the pattern is square.One of these can easily replace 3 or 4 Rotors, but keep in mind that one of these delivers only about 3.5 gallons per minute over that same area, so watering times will need to be longer per zone. That said you can install fewer zones with each one covering a larger area.You might be surprised when you first see these sprinkler heads: they are rather large compared to others.In one part of my system I installed three OS140 sprinklers on a single zone where previously there were 12 Rotors split between two zones in the same area, and it turns out that I could have used only two for that area. Three did turn out to be better because I was able to reduce the watering time a little bit by shortening the forward and back distances on all three so there was no “head to head” watering coverage, resulting in more “passes” over each sprinkler’s area.About “head to head” spacing: these sprinklers work best in the middle of an area, with no overlap between sprinkler heads. The only real benefit of head to head coverage with these sprinklers is a reduced watering time. If you do decide to use head to head coverage you should consider putting the edge sprinklers on a separate zone so their watering time can be reduced by half to prevent overwatering. Some Smart controllers (the Yardian Pro) can run two zones at once, so you could start with center heads and edge heads (if pressure permits) and have the edge zone turn off halfway through the cycle.The design of the OS140 is an improvement over previous models that had a flip up lid and a more limited range of oscillation. The head of the new design sits neatly in a slot in the lid, and the lid can be removed and replaced at any angle, making it easy to fine tune the position of the of the head.The head can be removed without any tools by simply unscrewing it counter-clockwise. This gives you quick access to the filter for cleaning when needed. The spring mechanism remains in the bottom, secured by its own raised collar, and can also be removed if service is needed.The lower part of the body has a bunch of fins, or ribs, that firmly secure the sprinkler in the ground. My lawn guy has run over them many times and they haven’t budge or tilted, even when the ground was still soggy after a storm.The pipe connection is a female 3/4” NPT standard located at the bottom. For my installation I used a 90 degree threaded/glued elbow and connected directly to the laterals with PVC.These were installed in sandy soil by digging a 14” diameter hole, about 12” deep, and then seating the sprinklers in about 3” of pea gravel and fine sand up to the second fin/rib (mostly underneath the head to protect the pipe). The rest of the hole was filled in with the removed soil, tightly packing the dirt into the remain fins/ribs.Once the head is installed you really cannot turn the sprinkler body, but it is very easy to position the spray head to face the right direction by turning clockwise (you really can’t over tighten the threads since the pop up mechanism is designed to turn clockwise once the head is firmly screwed in).Overall I am very happy with this product, and my friends and neighbors are really impressed how well they work and pretty they are to watch. It’s like adding “dancing fountains” to my yard.If only they lit up at night: a strip of LEDs across the head powered by a little water turbine, perhaps?

Ottimo per chi come me ha porzioni di prato strette e lunghe. Si possono le gittate indipendentemente per lato. Inoltre si può regolare la larghezza della fascia. Molto preciso e costante. Soddisfatto

Instalado en un pasillo de césped, la regulación de caudal, anchura y distancia de riego hace perfecto este producto para zonas estrechas y alargadas, en mi caso regando un pasillo de 1,5x 6 meteos

It works really well and does exactly what it's supposed to. It's well built and i'm sure will last.A few frustrations frustrations:-1) It needs the 25mm connection pipes. I already had laid 13mm pipe and have loads of this stuff, needed to order the 25mm stuff.2) It needs a Gardena 25mm x 3/4-inch L-Piece Male Thread connector to screw into the bottom. Really annoyingly the part isn't included in the box and while the instructions contain a picture for installation, the part number isn't referenced, I accidentally ordered the 1/2 inch one.3) It needs the drainage valve to be frost free install (important in the UK)It works really well and am pleased, however the item isn't cheap (~£50) but adding on the required accessories etc brings it nearer to double the price which I wish I'd known before ordering. I might have considered something else.I will order another as we have an L-shaped lawn and 2 will cover the whole area. Having seen 1 in operation I'm confident that the water pressure is good enough to manage more than 1.

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