Langley, Drain Pipe & Sewer Drainage & Water Mains Drainage Company. We are an expert company that specializes in Drain, Sewer Repairs. Odour in your backyard, broken or damaged pipes, wet soggy yards, odour in yard. Sewer back up issues. AMA Excavation, Drainage & Septic Services has over 25 years experience. We are a small company, that does what they say they will do. We show up on time, complete the job as estimated and pride ourselves on customer satification. We serve Langley, Maple Ridge, Surrey and Abbotsford, BC. Langley Drain Pipe & Sewer Drainage & Water Mains. Langley Water and Sewer Line Repair. Best Prices for Quality work.