Drainage &
Excavation.
Langley, BC.
Licensed drainage and excavation plumbing across Langley and the Lower Mainland — perimeter drains, sewer laterals, storm drainage, and site excavation done right. Experienced, fully insured.
- Perimeter & Foundation Drain Systems
- Sewer Lateral Replacement
- Storm Drainage & Catch Basins
- Site Excavation & Backfill
- Sump Pump Install & Pit Work
- French Drain Systems
- Downspout & Weeping Tile
What customers say
4.9 average customer rating
★★★★★
Excellent work! Highly recommend. Professional and efficient; would use again.
Noelle, ChilliwackFaucet installationAugust 2026
★★★★★
Benneth is very knowledgeable, professional, and reliable. He made a great first impression, and I will be using him again for other jobs. Highly recommend!
Joel M., BurnabyToilet installationJuly 2026
★★★★★
Excellent service from Ben at Seastack Mechanical. Ben demonstrated exceptional professionalism, honesty, and work ethic throughout the entire job. His response time was very quick, and he was a pleasure to work with. Although I had mistakenly omitted some of my requirements in the original work order, Ben did not hesitate to return to my home a second time to ensure everything was completed exactly as I wanted. What impressed me most was that he never asked for any additional payment, even though the extra visit was clearly beyond the original scope of work. His positive attitude, integrity, and commitment to customer satisfaction truly stood out. He made sure every aspect of the job was completed to a high professional standard. I am extremely satisfied with his service and would not hesitate to call him again for any future plumbing needs. Highly recommended!
Stephen, MissionHeating system repair (new gas top connection)May 2026
What We Handle
Perimeter & Foundation Drains
Full perimeter drain replacement, weeping tile systems and foundation drainage — protecting your home from water intrusion at the source.
Get a Quote →Sewer Lateral Replacement
Main sewer line replacement from house to municipal connection — open-cut or minimally invasive methods, properly permitted and inspected.
Get a Quote →Storm Drainage Systems
Catch basins, storm laterals, swales and surface drainage solutions for properties prone to standing water or runoff issues.
Get a Quote →Excavation & Site Work
Precision hand and machine excavation for drainage and plumbing projects — proper backfill, compaction and site restoration included.
Get a Quote →Drainage Done Right Protects Your Investment
Poor drainage is the leading cause of foundation damage, basement flooding and structural issues in the Lower Mainland. A licensed plumber ensures your drainage system is designed, installed and inspected to code — protecting your property for decades.
- Properly permitted — drainage work requires permits in most Lower Mainland jurisdictions. We handle it.
- Code-compliant install — slope, material spec and connection type matter. Experience means it's done right.
- Upfront fixed pricing — excavation scope quoted before we dig. No surprise invoices mid-project.
Signs You Need Drainage Work
Wet basement after rain, soft spots in your yard, water pooling near the foundation, cracked or heaving concrete — these are drainage failure signs that get worse if ignored.
Langley Soil Conditions
Much of Langley sits on clay-heavy Fraser Valley soil with poor natural drainage. Proper perimeter and storm systems are critical — especially in Willoughby, Walnut Grove and Murrayville.
Permit & Inspection
Sewer lateral and major drainage work requires Township of Langley or City of Langley permits. We manage the application and arrange inspections — you don't have to.
Langley & Lower Mainland Drainage
Primary coverage across Langley Township and City — extended service across the Lower Mainland and Fraser Valley.
Drainage Problem? Let's Fix It Right.
Free assessment and fixed-price quote for all drainage and excavation work in Langley and the Lower Mainland.
Plumbing, Heating & Excavation in Langley, BC
Our Specialized Langley Services
Seastack Mechanical delivers licensed residential and commercial plumbing across the Township of Langley. From emergency repairs to full system installs, our local team responds fast and works to code.
Why Langley Homeowners Choose Seastack Mechanical
- Licensed & insured — fully certified for BC plumbing work.
- Local & fast — based in Langley, quick on-site response.
- Upfront pricing — clear quotes before any work begins.
- Quality workmanship — clean, code-compliant installations.
Serving the Entire Township of Langley
We cover Willoughby, Walnut Grove, Murrayville, Brookswood, Fort Langley, Aldergrove, and surrounding neighbourhoods. Call us for drainage, repairs, and new installations anywhere in the township.
