Can I permanently connect my countertop dishwasher or install it under counter?

No.  A countertop dishwasher is not designed or intended to be built in under a counter or inside of a cabinet.  Countertop dishwashers are only to be installed and used as instructed.  Please refer to the user manual for your specific model for installation and operating instructions.

If you feel that a built-in unit would suit your needs better, we offer the EdgeStar Energy Star 18" Built-In Dishwasher in stainless steel or in white.