how to change a sprinkler head

{"cid":"91190139","title":"1\/2'' Plastic Irrigation Impact Sprinklers Agriculture Impulse Sprinkler Head","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/87\/62\/37069e50b77394ac154e76fc0094-200x200-1.jpg","attrs":{"Price":"Negotiate","Brand Name":"TJ","Model Number":"YA0112","Minimum Order Quantity":"1000pcs","Delivery Time":"10-15days","Certification":"IS09000","Place of Origin":"China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"5000pcs\/day","Packaging Details":"1pc\/bag,100pcs\/ctn","Name":"Impact Water Sprinker","Material":"POM","Sprinkler Type":"0-360 Gear Drive","Thread":"Male 1\/2 Inch","Spring":"stainless steel","Application":"Watering irrigation"}}

{"cid":"91167708","title":"wall-mounted type stainless steel shower, emergency drench shower head","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/08\/b4\/a6055efd084386fe893083ea373b-200x200-1.jpg","attrs":{"Price":"$60-80\/set","Brand Name":"WINBAY","Model Number":"WBGC11","Minimum Order Quantity":"1","Certification":"CE, OHSAS, ANSI,WATER MARK, ISO","Place of Origin":"CHINA","Payment Terms":"L\/C, T\/T, Western Union, paypal","Supply Ability":"10000SETS\/MONTH","Packaging Details":"1-3DAYS","Production standard":"American ANSIZ358.1-2014.","Function":"shower","Nominal pressure":"1.0mpa.","Work pressure":"0.2-0.4mpa","Flow rate":"more than 75.7 L\/min.","inlet size":"1 inch internal thread","outlet":"public discharge","Gross weight":"4KG","Net weight":"3KG","Packing size":"L * W * H = 750 * 300 * 250mm.","Product size":"L * W * H = 260 * 500 * 800mm"}}