Mark 4 Plumbing provides professional hot water repair and replacement services across Philadelphia. Whether you’re upgrading to a more energy-efficient model or replacing a failing tank, our team ensures safe removal and expert installation of electric, gas, or tankless water heaters. We assess your household’s hot water needs to recommend the best system and guarantee code-compliant setup. With over 40 years of experience, you can count on us for reliable service, transparent pricing, and lasting results that keep your water hot and your home running smoothly.