Signs a floor drain needs cleaning
- Water pools around the grate and drains slowly or not at all
- A sewer or musty odor comes from the drain
- Water rises out of the floor drain when a washer, sink or toilet is used
- Debris, sediment or grease is visible under the grate
- Drain flies gather around the drain
- The drain gurgles when other fixtures empty
What clogs floor drains
The cause depends on where the drain is and what it collects.
Garages and utility areas
Dirt, sand, leaves and sediment wash in from vehicles, shoes and outdoor equipment. Over time the trap fills with grit that water cannot move.
Commercial kitchens
Kitchen floor drains catch grease, food scraps and cleaning residue. Grease coats the trap and the line, and solids settle into it. These drains often need grease line cleaning to stay open.
Laundry and mechanical rooms
Lint, soap residue and mineral scale from water heaters and equipment build up in the trap. If a floor drain is near your washer, read about laundry drain cleaning as well.
The dry trap problem
Not every floor drain odor means a clog. Floor drains have a trap that holds water to block sewer gas. If the drain is rarely used, that water evaporates and gas comes straight up through the grate. Pouring a gallon of water into the drain every few weeks often solves it, and a small amount of mineral oil poured on top of the water slows evaporation in drains that sit unused for long periods. If the smell returns quickly, the trap may be cracked, or the drain may have a venting issue worth looking at.
Some floor drains also have a trap primer, a small line that adds water automatically. If yours has one and the drain still dries out, the primer may not be working.
When the floor drain is a symptom
If water comes up through a floor drain when other fixtures are used, the floor drain is not the cause. Floor drains are usually the lowest opening in the plumbing, so when the building drain or main sewer line is blocked, backed-up water rises there first. In that case the fix is downstream. We'll clear the line and, if needed, recommend main sewer line cleaning or a camera inspection to see why it happened.
Keeping floor drains working
- Keep the grate in place and clear visible debris from the top regularly.
- Do not sweep dirt, sand or gravel into the drain.
- In kitchens, scrape and squeegee floors before mopping so solids stay out of the drain.
- Pour water into rarely used floor drains every few weeks to keep the trap sealed.
- Never pour paint, solvents, oil or chemicals into a floor drain.
Floor Drain Cleaning in Long Beach, step by step
- 1
Inspect the drain
We remove the grate, check the trap and look for sediment, grease or standing water.
- 2
Test the pattern
We check whether the drain is clogged locally or reacting to a blockage farther downstream.
- 3
Clear and clean
We clear the trap and line with the right cable or jetting method for the pipe and debris.
- 4
Verify flow
We run water to confirm the drain is moving and explain what caused the problem.
Floor drains in Long Beach buildings
Basements are uncommon in Long Beach, so residential floor drains are most often in attached garages, laundry rooms and utility closets near the water heater. Many of these drains are used only when something goes wrong, which makes dry traps and slow, grit-filled lines common surprises. In restaurant kitchens, floor drains take mop water, ice melt and spills every shift, so grease and food debris build up much faster than in homes.
Some outdoor and garage-area drains connect to the storm drain system rather than the sewer. Before washing anything into a drain you are unsure about, find out where it goes; our storm drain cleaning page explains why that matters.