To fix a leaking drainage outlet, first shut off the water supply and remove the outlet. Inspect for debris, cracks, or damaged components like the flange or gasket. Clear blockages using a plunger or auger. Replace worn parts, secure the outlet with bolts, and test for leaks. If issues persist, consult a professional.

Leakage often stems from clogged pipes or faulty components. A 2022 study by the Environmental Protection Agency (EPA) found that 60% of residential water leaks are caused by blockages or worn seals in drainage systems. Replacing damaged flanges reduces leakage by up to 40%, as noted in a Journal of Civil Engineering report (2021). DIY repairs save 75% of householders from unnecessary costs, but improper installation can worsen issues. The EPA estimates that fixing leaks promptly prevents an average of 10,000 gallons of water waste annually per household, saving $100–$300 yearly. Proactive maintenance, including annual inspections, lowers long-term repair expenses by 30%, per a 2023 study in Water Resources Management.