The answer to 'which is better supply line or' is that both supply lines and pipes have their advantages, and the best choice depends on your specific plumbing needs and situation. Supply lines are flexible hoses that connect fixtures like sinks and toilets to the main water supply. They are generally easier to install and can be more forgiving of minor misalignments. Pipes, on the other hand, are rigid and can provide a more secure and long-lasting connection, but may require more complex installation. Ultimately, the choice between supply lines and pipes will depend on factors like the age and layout of your plumbing system, the accessibility of the connections, and your own DIY skills and preferences.
When deciding between supply lines and pipes, consider the overall condition of your plumbing, the specific fixture you're connecting, and whether you feel comfortable tackling the installation yourself. If you're unsure or the job seems complex, it's always best to consult a professional plumber who can assess your situation and provide a recommendation.