how to repair toilet fill valve

{"cid":"91186512","title":"G3\/8\" Piston adjustable toilet fill valve For Toilet Cistern Mechanism","imgUrl":"https:\/\/img.chinax.com\/nimg\/ab\/a9\/5d02c41470d04ee7a00f1935026c-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"MRJ","Model Number":"A01003 ,A01004","Minimum Order Quantity":"Negotiation","Delivery Time":"20-25 days","Certification":"CE WRAS","Place of Origin":"CHINA","Payment Terms":"L\/C, T\/T, Western Union, MoneyGram","Supply Ability":"200,000pcs per month","Packaging Details":"Bubble & PE bag,color box,color card +Blister","Product Name":"Side fill valve,Piston Fill Valve","THREAD":"G1\/2\",G3\/8\",G15\/16\" are all available","Life Testing":"50,000 times","Color":"As Customized","Materails":"ABS & POM","Place":"Xiamen,China"}}

{"cid":"91140482","title":"Flush Valve Fill Valve Push Button 3" Outlet Dual Flush Toilet Repair Parts From Xiamen China","imgUrl":"https:\/\/img.chinax.com\/nimg\/0b\/ab\/29065b19245248944ce34eda3ebe-200x200-1.jpg","attrs":{"Price":"quotation as per inquiry","Brand Name":"VGA","Model Number":"IV101+OV301+PB202","Minimum Order Quantity":"1000","Delivery Time":"within 15 days","Place of Origin":"China","Certification":"CE, WRAS, ISO9001, CQC, SGS","Packaging Details":"1PC\/PE Bag, 36PCS\/CTN","Payment Terms":"T\/T, LC","Supply Ability":"100,000 sets per month"}}

{"cid":"91220569","title":"3 Inch ABS Material Flush Valve Mechanism with Adjustable Flushing for Toilet Repair Kit in Bathroom Cisterns","imgUrl":"https:\/\/img.chinax.com\/nimg\/a8\/1a\/c7c52c8b0089b83204e2a112fe2c-200x200-1.jpg","attrs":{"Price":"Negotiated dollar","Brand Name":"YCM","Model Number":"P1003","Minimum Order Quantity":"500 pieces","Delivery Time":"15-30day","Place of Origin":"Fujian, China","Packaging Details":"10 piece\/CTN","Supply Ability":"100000 Piece\/Pieces per Month","Certification":"CE","Warranty":"3 years","Material":"ABS","After-sale Service":"Online technical support, Onsite Training, Other","Project Solution Capability":"graphic design, 3D model design, total solution for projects","Application":"Hotel and toilet","Color":"Customizable","Flushing valve type":"Manual control","Materials":"Anti-lock braking device","Embedded":"Single flush","Flushing outlet size":"3 inches","Flushing capacity":"adjustable","Flushing speed":"4.7liters per second","Overflow pipe height":"adjustable","Certificate":"CE UPC CUPC","Port":"xiamen"}}