This model is similar to model 14 with one big difference: it's capable of automatically switching the fluid flow direction on any of its 4 ports, and running various recovery cycles in one set-up completely autonomously.  

It's equipped with an "indestructible" Swiss-made KNF pumps: two pressure pumps rated at 85psi, and one vacuum pump. This machine has enough flow rate to clean up to 6 print heads at once. It can recover 2 Kyocera KJ4 print heads (300dpi or 600dpi).

Advantages of Print Head Doctor 15:

• Automatic fluid flow direction switching in all 4 ports.
• It can run different recovery cycles one after another, without the need to switch the tubes.
• Touchscreen and advanced software.
• Advanced 75kHz ultasound with variable power control, to keep your print heads safe.
• Complete control of the machine from Android devices and web browsers.
• Automatic pressure and vacuum control with the digital pressure and vacuum readouts.
• Fully user-customizable programs and unlimited program memory.
• High flow of 1200 ml/min at a high pressure of up to 25psi allows cleaning multiple heads at once.
• Two main filters and 4 input filters. 
• High pressure of 25 psi makes the reverse flushing very effective.
• Capable of doing forward, reverse and thru-head flushing of print heads, with or without Reverse Flushing Caps.
• Fine-tuned recovery cycles accommodate various degrees of clogging, types of print heads and inks.
• First-stage filters are conveniently located on the side wall and can be replaced in seconds.
• Dual first-stage filtration for higher fluid flow rate and longer period between changing filters.
• Rugged housing with all components built-in.
• All solvent-proof materials.