6-Year Limited Tank Warranty, 6-Year Parts Warranty, 1-Year Labor Warranty. Compact-Top-mounted plumbing connections (optional side-mounted water connections for field conversion). Designed for installation under a counter, in a crawl space or in other tight spaces. Blue Diamond® Glass Coating-Provides superior corrosion resistance compared to industry standard glass lining. Enhanced-Flow Brass Drain Valve-Our standard residential water heaters have a solid brass, tamper resistant, enhanced-flow, ball type, drain valve. Models ship with supplied insulation blanket Approved for Manufactured Housing-All residential electric water heaters are compliant with HUD Standards for mobile home/ manufactured housing.