French Drain or Catch Basin: Where Will Water Enter Your New Drain?
A French drain and a catch basin are not interchangeable names for a buried pipe. Before choosing between proposals, ask each contractor to show where water will enter the system and how it will reach that point. The right comparison starts with the collection method, not simply the number of feet of pipe.
Follow the water into the system
The Northern Virginia Soil and Water Conservation District describes a French drain as a buried system with perforated pipe and surrounding gravel. A catch basin, by contrast, receives surface runoff through an inlet at the top of a collection box, then sends it into a drainpipe. The district also notes that the two can be combined.
These descriptions explain the components, not which design your yard needs. Ask the contractor to point out the intended collection area on your property. Is the proposal collecting water along a trench, at a surface inlet, or through both? Have that explanation added to the drawing or scope.
Compare the same problem, not matching pipe lengths
Suppose one proposal lists a French drain while another lists two yard inlets and connecting pipe. Do not assume the longer installation solves more of the problem. Ask both contractors to identify which wet areas their proposals address and which areas remain outside the work.
Use three questions during the review: Where does water enter? What route connects that location to the discharge point? What remains visible in the finished lawn? Request a marked sketch with the proposed collection features identified separately from the connecting route. You should be able to understand the intended function without selecting pipe sizes or excavation depths yourself.
Resolve the unanswered part before signing
Both approaches need a suitable destination for the collected water. The conservation district cautions that redirecting runoff can affect neighboring properties. Ask who will evaluate the proposed outlet rather than accepting a line on a sketch that simply ends at the property boundary. Its guidance is general background, not a Tennessee site design.
For a Middle Tennessee yard, send the competing scopes and your collection questions with the proposal request. Milliken Corporation lists French drains, storm drains, and trench drains among its drainage services. Ask the team to explain its recommended collection approach for your property, including what further evaluation is needed before committing to it.
Frequently asked questions
Does every French drain need a surface grate?
Not necessarily. A catch basin can be combined with a French drain, but it is a separate collection feature. Ask whether surface inlets are part of the proposed system.
Can I choose by comparing the price per foot?
Only after you understand what each scope includes. Ask for collection features, connecting pipe, outlet work, and restoration to be identified so you are comparing the same intended result.