I would need more information about the issue with your water heater in order to provide an accurate estimate for the repair.

As a licensed plumber, you can tell if there is a gas line leak in your home or property by looking for the following signs:<br /><br />1. Rotten egg smell<br />2. Hissing or whistling sounds near gas lines<br />3. Dead plants or vegetation near the gas line<br />4. Bubbles in standing water<br />5. Higher than usual gas bills

The installation of an overhead sewer system can impact the overall plumbing layout by requiring additional piping and connections to redirect wastewater to the elevated sewer line. Maintenance requirements may increase due to the complexity of the system and the need for periodic inspections to ensure proper functioning.

To prevent future clogs in your sewer drain after it has been cleared, you can consider the following measures:<br /><br />1. Avoid flushing non-biodegradable items down the toilet.<br />2. Use a hair catcher in the shower and bathtub drains to prevent hair buildup.<br />3. Dispose of cooking grease and oil in a proper container instead of pouring it down the drain.<br />4. Regularly clean out debris from drain strainers and stoppers.<br />5. Consider scheduling regular professional drain cleaning maintenance to prevent buildup.

To determine the appropriate size and capacity of a commercial water heater for your business's needs, you should consider factors such as the number of fixtures, peak hot water demand, and the temperature rise required. It is recommended to consult with a licensed plumber to accurately assess your specific requirements.