llave conexion agua caldera m1 2 h1 2 mango-m0006884 Why does this accessory deteriorate

Why does this accessory deteriorate

94971254200 EOB 51001 K ELECTROLUX

911524049 04 F56322IM0 AEG

SN236I00JT

llave conexion agua caldera m1 2 h1 2 mango-m0006884 Why does this accessory deteriorateConnection valve for water boilers. Its main features include: Connection M 1 2 F 1 2 (Male 1 2 inch Female 1 2 inch), Union nut, Blue color. Technical Specifications: Sku: 372. 00. 0010 Brand: STANDARD Unit weight kg: 0. 14 Length cm: 6. 0 Height cm: 6. 0 Width cm: 3. 0 Compatibility: Systems with connections M 1 2 F 1 2 Applications: Water connection in boilers Water flow control in heating systems Benefits: Allows connection and control of water