A Basin Designed to Change the Game
Sediment Trap Keeps Line Clean – Shingle gravel and sediment can quickly clog drainage systems. FDM’s inline catch basin is designed to mimic a pipe belly, allowing the sump to collect and hold sediment before it enters the drain line.
Large Sump, Slim Profile – A massive 1-gallon sump captures sediment before it enters the line, while the slim 5″ profile fits easily inside a trench without digging oversized holes or using heavy equipment.
Built for Freeze-Thaw Conditions – The basin top is shaped like a 4″ drain pipe so water continues flowing when the system maintains a 1% slope—preventing standing water and winter freeze-ups. The sump is built to handle freeze-thaw conditions without cracking, made from 100% virgin HDPE with no fillers or recycled materials for maximum strength and longevity.
Pilot Holes for Optional Drilling – There are 6 pilot holes at the bottom of the basin, allowing installers to easily drill holes if they want water to leach into the surrounding soil.
Easy to Clean – The sloped sediment trap prevents debris from settling in the center, making cleanup easy. Simply remove the grate, vacuum out the sediment with a shop vac, and snap the grate back in place.
A Basin Designed to Change the Game

Sediment Trap Keeps Line Clean – Shingle gravel and sediment can quickly clog drainage systems. FDM’s inline catch basin is designed to mimic a pipe belly, allowing the sump to collect and hold sediment before it enters the drain line.
Large Sump, Slim Profile – A massive 1-gallon sump captures sediment before it enters the line, while the slim 5″ profile fits easily inside a trench without digging oversized holes or using heavy equipment.
Built for Freeze-Thaw Conditions – The basin top is shaped like a 4″ drain pipe so water continues flowing when the system maintains a 1% slope—preventing standing water and winter freeze-ups. The sump is built to handle freeze-thaw conditions without cracking, made from 100% virgin HDPE with no fillers or recycled materials for maximum strength and longevity.
Pilot Holes for Optional Drilling – There are 6 pilot holes at the bottom of the basin, allowing installers to easily drill holes if they want water to leach into the surrounding soil.
Easy to Clean – The sloped sediment trap prevents debris from settling in the center, making cleanup easy. Simply remove the grate, vacuum out the sediment with a shop vac, and snap the grate back in place.
All Catch Basins
TORRENTIAL RAIN™ 4 in. Catch Basins
I had the catch basin positioned just before a Flo Well dry well, with a pop up emitter on top of the catch basin so it would overflow if the dry well got completely full.
One tip that I found, was to use the SDR pipe with the large built in coupling bell end at the top so the height of the NDS pop up emitter could be easily adjusted.
Thank you French Drain Man
James Li from Louisville, Kentucky.











































