Free tool
Water Inflow and Sump Planner
See how much water a storm can send toward your foundation and what pump size fits.
A planning illustration. One inch of rain on one square foot is about 0.62 gallons. Real inflow depends on grading, soil and the groundwater, so we measure the site before sizing a pump.
How to use it
Three quick steps
- 1Enter the roof and rainRoof area and one hour of rain.
- 2Describe the siteDownspouts, soil and water table.
- 3Read the planSee water volume, pump size and cycle time.
Questions
About the water inflow and sump planner
Is this a real forecast?
No. It is a planning illustration that shows how roof area, rain and site conditions combine. We size pumps after looking at your site.
Why do downspouts matter so much?
Roof water that empties next to the wall soaks the soil right where it can reach the foundation.
Do I need a battery backup?
If storms bring power outages, yes. A backup keeps the pump working when you need it most.
Next step
Services that go with this tool
Sump Pump Installation and ReplacementA reliable pump in a sealed basin that clears water before it spreads.See the service 
Interior Crawl Space Drain SystemA perimeter drain that collects water and sends it to a sump.See the service 
Exterior Grading and Downspout DrainageSoil, gutters and downspouts that send rain away from the house.See the service Ready to look under the floor?
Call or text, or send the form. Tell us what you have noticed and we will tell you how we would handle it.