The Epson XP-55 printer is also compatible with the XP2 pad set but has a somewhat unique installation process for both the waste ink pads and the external XP3 Printer Potty waste ink kit.
The two guides below detail how to install these kits.
Printer Pad installation (XP2 pad set) for XP-55
Printer Potty installation (XP3 external waste tank) for XP-55
The Printer Potty kit shown in the above video is, as ever available in two flavours, with and with the key as part of a bundle using the following links: