Water and Drainage
Interior Crawl Space Drain System
An interior drain is a perforated pipe in a bed of clean gravel along the inside of the foundation wall. It collects water that seeps in and sends it to a sump pump basin, so water leaves the crawl space instead of sitting in it.
- Best forSeepage along walls and low spots on the floor
- Typical rhythmOften two to three days
- TeamInstallers who trench, lay pipe and finish
- Pairs well withA sump pump and vapor barrier
What you get
What interior crawl space drain system includes
- 1Sloped for flowThe pipe is laid with a slope toward the sump.
- 2Clean gravel bedWashed stone lets water move freely to the pipe.
- 3Cleanouts plannedAccess points make future maintenance simple.
- 4Finished neatlyGravel and liner are tidy and sealed afterward.
How it goes
From the first call to a dry, finished space
- 1Plan the routeWe mark the drain path and the sump location.
- 2Trench and lay pipeThe pipe and gravel go in with the right slope.
- 3Connect to the sumpThe drain is tied to the basin and tested with water.
- 4Cover and sealThe floor is lined and sealed over the system.
Good fit when
Is interior crawl space drain system right for you?
- Water appears along the walls
- Part of the floor stays wet
- You have a sump pump but water still collects
- You want long-term control, not temporary pumping
Questions
About interior crawl space drain system
Does the drain need power?
The drain itself works by gravity. The sump pump that empties it uses power, so we often add a battery backup.
How often does the system need care?
Occasional checks of the pump and basin are usually enough. We leave notes on what to check and when.
Related services
Often paired with this
Sump Pump Installation and ReplacementA reliable pump in a sealed basin that clears water before it spreads.See the service 
Sump Pump Battery BackupA second pump with its own battery for storms and power outages.See the service 
Crawl Space WaterproofingA drainage, sealing and pumping plan that keeps liquid water out for good.See the service Where we work
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