IT has a 51mm portafilter. You can contact DeLonghi USA at 1-800-322-3848 or www.delonghiusa.com. They will be able to troubleshoot, send parts, or refer you to a repair center that is certified to repair the DeLonghi brand.
I woud like to buy a Tamper, however, I do not know the size. Please tell me the size of the Tamper that would fit the filter for the DeLonghi EC702. Where or what site to use to buy parts(order) for my DeLonghi EC702? Thank you very much..