What is an important condition for a manhole installed near a waterline?

A manhole installed near a waterline must be completely watertight and tested to prevent the intrusion of water into the sewer system. This is crucial in maintaining the integrity of the wastewater system and ensuring that it functions properly. If water were to seep into the manhole, it could dilute the wastewater flow, disrupt treatment processes, and lead to contamination issues.

Furthermore, a watertight manhole helps prevent the inflow of groundwater, which is often a concern in areas where waterlines are present. Monitoring and testing these manholes for watertightness ensures that there are no leaks or breaks that might allow water to affect the wastewater system's performance.

While lockable covers, waterproof coatings, and elevation above the waterline have their own importance, ensuring that the manhole is watertight and has been properly tested addresses the most critical need for operational reliability and environmental protection in wastewater management.