What indicates water contamination in a heating oil tank?

The presence of sludge or sediment is a key indicator of water contamination in a heating oil tank. Heating oil is less dense than water, and when water enters the tank, it often settles at the bottom. This accumulation can lead to the formation of sludge, which consists of microorganisms and particulate matter that mix with the water and oil. Over time, this sludge can accumulate and disrupt the functioning of the heating system, potentially causing clogs and reducing efficiency.

Identifying sludge in a tank not only signifies that water has breached the oil layer but also highlights the necessity for maintenance and remediation to prevent further issues, including potential damage to heating equipment. Proper monitoring of sludge levels is a vital aspect of tank management to ensure optimal operational performance and to maintain quality heating oil.