Why can't this tub be used in a mobile home?

The reason this bathtub is marked “Not for use with mobile homes” is because mobile homes and manufactured homes have different structural, plumbing, and code requirements compared to standard site-built homes. Standard residential tubs like this one are designed for typical wood-framed floors and plumbing configurations, and MAAX labels this model as not intended for mobile homes to reflect those differences and to limit liability. Mobile home bathtubs are often lighter, sized and reinforced differently, and built to meet specific mobile home manufacturing codes and floor support criteria that this standard residential tub does not claim to meet. That doesn’t necessarily mean you can’t install it — many people do install standard acrylic tubs in mobile homes as long as the floor support, plumbing, and drain alignments are properly reinforced and meet local codes — but the manufacturer’s designation means they haven’t tested or certified it for mobile home use. If you choose to proceed, you’ll want to confirm with your installer/building inspector that the existing floor structure and plumbing setup in your mobile home can support this tub and that local mobile home codes are met.