Usually a stackable washer and dryer system will need a special outlet. Dryers usually run on a 220 outlet so they will need a special outlet installed where you plan to place your washer and dryer.
Stackable washer dryer combination only requires one type of outlet. Both units run on 110v circuit. Therefore, only one outlet is necessary to plug both units into.
If the dryer itself already includes a socket outlet that was designed to power a stackable washer then you should have no problem as long as the home's Dryer Circuit, and its breakers, can support the extra Kilowatts of power which the washer will take.To your question "Is there an adapter that would allow for separate use of the washer in its own outlet" the answer is No.Even if the stackable washer is mounted on top of the dryer it may still be possible to plug the washer into the existing, but separate, socket outlet that is intended to power a washer. If you cannot do that then it is best that you call in a licensed electrician to advise you.IF YOU NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicator to insure the circuit is, in fact, de-energized.
form_title= Stackable Washer Dryer form_header= Purchase a new stackable washer and dryer. Do you need to remove an old washer and dryer?*= () Yes () No Do you want an HE washer?*= () Yes () No What is your budget for a new washer or dryer?*= _ 
Rent-A-Center is a good place to find a stackable washer and dryer.
No. Don't do it. You need 240 volt supply.
We think the best stackable washer and dryer are rated with Energy Star labels in saving the environment and cutting electrical bills. Cheers, http://Stackable-Washer-Dryer-Reviews.com
Yes, Best Buy does sale stackable washer dryers. They have a variety of stackable washer dryers. Go to you local Best Buy to find the unit that is best for you.
The best place to shop for stackable washer and dryers is most likely, Home Depot or Sears. Stackable washer and dryers are quite effective. Saves room in the house and does the job well. Depending on which brand and how high quality you're looking for in the stackable washer and dryers is what determines the cost.
The Whirlpool is a standard 20" stackable washer/dryer that should fit in any apartment.
About 6 feet.
You can buy a stackable washer and dryer on sale by going to any of the followoing websites www.amazon.com or www.sears.com or www.homedepot.com for sales