Blocked drains are often caused by materials gradually building up inside the pipes and restricting water flow. Common causes include:

• Grease, cooking oil and food scraps in kitchen drains
• Hair, soap residue and toiletries in bathroom drains
• Excess toilet paper, wipes and sanitary products
• Foreign objects accidentally entering the drainage system
• Leaves, dirt and other debris in outdoor drains
• Tree roots growing into underground pipes
• Damaged, cracked or collapsed drainage pipes

If a drain keeps becoming blocked, it may indicate an underlying problem with the pipework that needs further investigation. Addressing it early can help prevent wastewater from backing up, unpleasant smells and possible water damage.