06/10/2026
The 4-Inch Problem
Four inches may not sound like much.
Until you're trying to fit a new water heater through a closet door.
Many older lowboy water heaters were approximately 19" in diameter. Today's replacement models can be closer to 23" in diameter.
That small difference can mean:
• Modifications to the closet
• New drain pans
• Plumbing adjustments
• Additional installation costs
Planning ahead can help avoid surprises.