# Do you need a French drain or a catch basin?

> French drain vs catch basin: one collects water held in the soil, the other catches water on the surface. How to tell which your Plano yard needs, or both.

URL: https://clayplanodrainagecompany.com/guide/french-drain-vs-catch-basin/

One works below ground and slowly, the other at the surface and fast. A simple timing test tells you which problem you have, and some yards need both on one line.

Last Updated: November 11, 2026

The short answer

It depends on where the water is. A catch basin takes in surface water through a grate in seconds, so it suits a low spot that fills during the storm. A French drain gathers water held in the soil through stone and perforated pipe, so it suits ground that stays soft for days. Some yards need both.

Key takeaways

- Catch basin: surface water, fast, at one low point. French drain: soil water, slow, along a line.
- Watch the yard during the storm and again two days later; the timing tells you which you need.
- Clay sheds nearly all of a heavy rain as runoff, which a basin handles and a trench can't.
- The two can share one solid outlet line to the street.
- A basin's sump holds grit; a plain inlet sends it into the pipe.

## Puddle or soggy ground?

The answer to this choice is in your yard during the next good rain. Water you can see sitting on top and water hiding in the soil call for different collectors.

[Clay Plano Drainage Company](https://clayplanodrainagecompany.com/) installs both [catch basins](https://clayplanodrainagecompany.com/catch-basins/) and [French drains](https://clayplanodrainagecompany.com/french-drain-installation/) across Plano, sometimes both on one line. This guide compares the two so you can tell which your yard needs before anyone digs.

## The timing test

Go out twice: once while it’s raining hard, and again about two days after the rain stops. What you see each time sorts the problem.

| During the storm | Two days later | Points to |
| --- | --- | --- |
| A puddle fills one low spot | The puddle’s gone, the ground is firm | A catch basin |
| Water sheets across the lawn | Dry on top | A catch basin, a swale or regrading |
| Little water on the surface | The ground is still spongy over a strip | A French drain |
| A puddle fills one low spot | The ground around it is still soft | Both, on one line |
| Nothing much | Soggy in one spot in a dry week | Neither; check the sprinklers first |

If the ground is wet when it hasn’t rained at all, the likelier cause is irrigation rather than drainage. The guide to [a soggy yard without rain](https://clayplanodrainagecompany.com/guide/soggy-yard-no-rain/) walks through it.

## Why speed decides it

Surface water arrives fast, and Plano clay takes in very little of it. A storm with a 50% chance in any year drops 1.80 inches in an hour over central Plano, by NOAA’s rainfall atlas.

On 2,000 square feet of lawn and paving, that’s about 2,200 gallons in the hour. The Houston Black clay under most of the city soaks up roughly 0.03 inches of it, so nearly all of that water runs to the low spot.

- **A catch basin** takes that water in through an open grate as fast as it arrives, then sends it down solid pipe.
- **A French drain** takes water in only as fast as it can seep through fabric and stone, which suits slow soil water, not a mid-storm flood.

## Side by side

The two collectors differ in more than where they sit. Here is how they compare on the points that matter to a homeowner.

|  | Catch basin | French drain |
| --- | --- | --- |
| Water it handles | Surface water pooling at a low point | Water held in the soil, or seeping through it |
| How water gets in | Through a grate at grade | Through fabric, washed stone and perforated pipe |
| Shape on the ground | One grate, with solid pipe leading away | A line, often tens of feet long |
| How fast it works | During the storm | Over hours and days after it |
| What you see afterward | A grate in the lawn or bed | A sod line, cleanouts and an outlet |
| Upkeep | Clear the grate, scoop the sump | Keep the outlet clear, flush through cleanouts |
| What ends it early | Leaves and grit left in the grate and sump | Clay fines in the stone, a blocked outlet |
| Our typical range | $500 to $1,500 per basin | $25 to $60 per foot |

The site visit and written estimate set your price within those ranges. The [catch basin cost guide](https://clayplanodrainagecompany.com/guide/catch-basin-cost-plano/) covers what moves a basin’s price.

## When the answer is both

A low spot that floods mid-storm and a strip of ground that stays soft for days can sit in the same back yard. Two collectors on one outlet line handle both.

1. **The basin** sits at the lowest surface point and catches the flash of storm water.
2. **The French drain** runs along the wet strip and gathers soil water slowly.
3. **Solid pipe** joins them below the perforated section, so surface water from the basin never flows back out into the stone.
4. **One outlet** at the street side of the lot takes it all.

Surface water poured into a French drain’s stone fills it before soil water can get in. Keeping each collector on its own job is what makes the pair work. A [whole-yard drainage system](https://clayplanodrainagecompany.com/yard-drainage/) is the name for that combined route.

## Catch basin or plain inlet?

A drainage inlet is just a grate over a pipe. A catch basin adds a box with a sump below the outlet pipe, where grit and heavier debris settle out before the water moves on.

In a yard with trees, beds or bare soil upstream, the sump protects the solid line behind it. Where the water comes off clean paving, a plain inlet can be enough. We choose by what the water carries.

## Other collectors worth knowing

Two more options come up when neither fits cleanly:

- **A channel drain** catches water at the edge of concrete, such as a garage apron or patio. The guide to [channel drains or French drains](https://clayplanodrainagecompany.com/guide/channel-drain-vs-french-drain/) compares them.
- **Regrading** gives sheet flow a route without any grate at all; see [yard regrading](https://clayplanodrainagecompany.com/yard-grading/).

A soak-away pit isn’t on the list for Plano clay, for reasons the guide to [where yard drain water can go](https://clayplanodrainagecompany.com/guide/where-can-yard-drain-water-go/) explains. To have someone run the timing test with you and price the right collector, call [(469) 551-8518](tel:+14695518518) or send photos through the form below.

## Questions about this guide

### Which costs less, a French drain or a catch basin?

It depends on the size of the job. Our typical range for one catch basin with a short pipe run is $500 to $1,500, and a French drain is priced by the foot at $25 to $60, so a short drain and a basin can land close together while a long drain costs more. The site visit and written estimate set yours.

### Will the pipe from a catch basin clog without a filter?

It can collect grit and leaves over time, which is why a catch basin has a sump below the outlet where heavier debris settles. Clearing the grate after storms and scooping the sump now and then keeps the solid line behind it open, and a cleanout lets it be flushed.

### Can a catch basin go in the middle of the lawn?

Yes, if that's the low point where water collects. A basin sits at the lowest spot of the surface it drains, with the grate set just below the finished grade so water runs in. The solid pipe from it still has to fall to the street side of the lot.

## Related service

- [Service**Catch basins** A grated box set at the lowest point of a lawn, bed edge or patio that takes in surface water and sends it through solid pipe to an outlet.](https://clayplanodrainagecompany.com/catch-basins/)

## More guides

- [Cost Guide**How much does catch basin installation cost in Plano?** What a catch basin with its own short pipe run costs in Plano, why a second basin on the same line costs less, and what makes a basin dearer.](https://clayplanodrainagecompany.com/guide/catch-basin-cost-plano/)
- [Decision Guide**Should you use a channel drain or a French drain?** Both are long and narrow, and both end in pipe to the street. One sits in concrete and catches water on the surface; the other sits in soil and gathers water below it. How to choose, and when to use both.](https://clayplanodrainagecompany.com/guide/channel-drain-vs-french-drain/)
- [Learn**Do French drains work in clay soil?** Plano's clay moves water at a crawl, which changes where a trench goes, how much stone it holds and what keeps it from silting up. What works here, and why some clay drains quit.](https://clayplanodrainagecompany.com/guide/french-drains-in-clay-soil/)
- [Decision Guide**Where do you drain a French drain in Plano?** The outlet decides the design, so we choose it first. Every option a Plano yard has, what each one needs, and how to pick when the lot is flat.](https://clayplanodrainagecompany.com/guide/where-can-yard-drain-water-go/)
- [Learn**Why is my yard wet when it hasn't rained?** A soggy patch in a dry week has a water source you can often find in an afternoon. The order to check things in, the meter test for hidden leaks, and when it really is a drainage problem.](https://clayplanodrainagecompany.com/guide/soggy-yard-no-rain/)

## Get an estimate for your yard

Tell us where the water stands and when. We walk the yard and send a written estimate.