This Kit,.750GPM Quiet Neop W/Gask is a genuine Bunn OEM replacement part. Part number 37857.1750 is used for certain commercial coffee equipment made by BUNN. This part will help repair specific issues you are having with Bunnomatic model HW5, HW5-X, TB3 Hot Water Dispensers. Replace this part if BUNN or a service technician has instructed you to do so. Over time Str/Cntrl for Bunn HW5, HW5-X, TB3 Hot Water Dispensers may need to be replaced because of normal wear and tear or if damage has occurred to the existing part. When replacing BUNN part #37857.1750 it is suggested that no power or water is connected to the machine and you are working in clean and non hazardous environment. Please be sure Kit,.750GPM Quiet Neop W/Gask fits your specific needs.