Dishwasher Installation: What to Check Before You Buy

Before buying a replacement dishwasher, a few measurements and checks can save you from a return trip to the store or an installation delay.

• Measure the existing cabinet opening's width, height, and depth precisely — standard widths vary between 18" and 24" models
• Check whether your kitchen has an existing dedicated electrical circuit, required for most installations
• Confirm there's an accessible shutoff valve for the water supply line
• Note whether your sink has a garbage disposal, since drain line connection differs slightly

If your current setup doesn't have a dishwasher at all, these same questions still apply — they simply need to be addressed as new plumbing and electrical work rather than a straightforward swap.