Submersible Dewatering Pumps
A1 Compressor Warehouse supplies submersible dewatering pumps for construction, mining and industrial drainage. As an authorized distributor, we supply rugged pumps that keep excavations, pits and work areas clear of water.
Submersible dewatering pumps drop right into the water and pump from the bottom up, handling silt, sand and abrasive solids that would clog surface pumps. Hardened wear parts and sealed motors let them run hard in the dirtiest conditions with minimal attention.
This collection covers submersible dewatering pumps across a range of flow and head ratings. We'll help you match flow, head and solids handling to your site conditions.
Every pump ships with genuine OEM parts and full manufacturer warranty. Talk to a specialist for sizing help. We offer same-day quotes on requests received before 3 PM ET. We ship nationwide.
How to choose a WEDA pump for your water and solids
Start with drainage, sludge or slurry
Choose the family for the liquid you need to move. WEDA D handles clean and dirty drainage water. WEDA S handles sludge, soft wet mud and light slurry. WEDA L is for abrasive media with solids. Then compare the specific model's flow, head and solids limit; the largest solids figure in the range does not apply to every pump.
The page covers smaller drainage pumps, higher-head D models and the S and L families. The table shows a model from each family, with single-phase figures for WEDA S30N.
| Model and family | Maximum flow | Maximum head | Maximum solids |
|---|---|---|---|
| WEDA D08N drainage | 66 gpm | 51 ft | 0.30 inch |
| WEDA S30N sludge, single-phase | 230 gpm | 52 ft | 2 inches |
| WEDA L100N slurry | 2,600 gpm | 114 ft | 2.4 inches |
Match flow at the lift you need
Max flow and max head do not happen at the same time. Use the pump curve to check flow at your required head. In the 31 HP drainage models, WEDA D80N reaches 1,560 gpm max flow and 147 ft max head; WEDA D80H reaches 670 gpm and 247 ft. Choose the duty you need rather than picking by horsepower alone.
Choose the right phase
Phase changes the WEDA S30N's ratings in the 60 Hz range. Single-phase is 3 HP with 230 gpm max flow and 52 ft max head; three-phase is 4 HP with 250 gpm and 58 ft. Match the configuration to your electrical supply, then check discharge size, pump weight and the space where it will work.
Common questions
What matters for construction dewatering?
Start with the flow you need, the lift and the liquid. Drainage water, wet sludge and abrasive slurry lead you to different WEDA families before you compare motor size.
Do I need a sludge pump or a slurry pump?
Choose S for sludge and light slurry, or compare L for abrasive media with high solids content. Use the exact model's solids limit rather than applying a family-wide maximum to every pump.
Will the highest-flow pump give me the most lift?
Not necessarily. WEDA D80N has the higher max flow of the two D80 models here; WEDA D80H has the higher head limit. Check your required flow on the curve at the lift you need.