What should I look for when buying sump pump types: submersible vs pedestal?

If your pit is standard size (18-24 inch diameter), always choose submersible. Cast iron submersible pumps are quieter and dissipate heat better than thermoplastic. A covered pit with a submersible pump is the quietest setup for basement living spaces.

What are common mistakes when buying sump pump types: submersible vs pedestal?

Buying pedestal to save money when a submersible fits. The noise difference is significant. Choosing a submersible for a pit that is too narrow -- it will not fit or will jam against the walls. Ignoring the pit cover. A covered pit reduces noise, prevents debris entry, and limits radon.

Sump Pump Types: Submersible vs Pedestal

Buying Guide

Created by Ryan Pietrzak Illinois Licensed Plumber · In the plumbing industry since 2009

Updated February 20, 2026

Key Takeaway

Submersible pumps sit underwater inside the sump pit. Pedestal pumps mount above the pit with the impeller reaching down. Most homeowners should choose submersible -- they are quieter, more powerful, and fit under pit covers. Pedestal pumps are for narrow pits where a submersible will not physically fit.

Overview

What to Know

Submersible

Motor and impeller sealed in one unit that sits inside the pit. Cooled by the surrounding water. Quieter because the water dampens motor noise and the pit cover contains sound. More powerful models available. Standard choice for residential. Lifespan: 7-10 years.

Pedestal

Motor sits on a column above the pit, impeller extends down into the water. Motor stays dry and is easier to service. Louder because the motor is exposed above ground. Limited to lower HP. Better for narrow pits (under 10 inches diameter). Lifespan: 15-25 years (motor stays dry).

Comparison

Submersible: quieter, more powerful, fits under pit cover, 7-10 year life, standard choice

Pedestal: louder, lower HP, easier motor access, 15-25 year life, narrow pits only

Buying Tips

If your pit is standard size (18-24 inch diameter), always choose submersible.
Cast iron submersible pumps are quieter and dissipate heat better than thermoplastic.
A covered pit with a submersible pump is the quietest setup for basement living spaces.
If choosing pedestal, ensure the motor column height fits your basement ceiling clearance.

Common Mistakes

Buying pedestal to save money when a submersible fits. The noise difference is significant.
Choosing a submersible for a pit that is too narrow -- it will not fit or will jam against the walls.
Ignoring the pit cover. A covered pit reduces noise, prevents debris entry, and limits radon.
Not considering a battery backup regardless of pump type.

Bottom Line

Submersible for standard pits. Pedestal only if your pit is too narrow for submersible. Always add a battery backup system.