Drainage
- What is a two pipe drainage system? A two pipe drainage system is setup to separate the collection of Ground Water from Rainwater. The Groundwater is collected by perimeter drains and flows away from the foundation. The Rainwater is collected from the Rain Water Leaders/Downspouts in a separate pipe usually above the perimeter ...
- How much slope for drain pipe. As a general rule, the recommended slope for most plumbing pipes is 1/8 inch vertical drop over every 1 horizontal foot, or 1” per 8 ft linear. Too much slope can cause clogging as water moves to fast and solids left behind.