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How to fix a slow-draining tub without using chemicals?

Fix your slow-draining tub without chemicals using simple DIY steps. Remove debris, plunge blockages, snake the drain, flush with boiling water, and clean the P-trap for lasting flow.

Reviewed by Content Team

Head of Content, D. Gorenko

Updated June, 5

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How to fix a slow-draining tub without using chemicals?

 
Inspect and Remove Debris From the Drain
 

  • Begin by removing the drain cover. Look inside for hair, soap scum, or any visible debris that might be causing a blockage.
  • Use either your fingers (with gloves) or a pair of tweezers to pull out any accumulation from within reach.
  • This step helps eliminate the major clog that can slow down draining.

 
Use a Plunger to Dislodge Minor Blockages
 

  • Cover the overflow drain (if your bathtub has one) by placing a wet cloth over it. This prevents air from escaping.
  • Fill the bathtub with enough water to cover the bottom of the plunger, ensuring a good seal.
  • Position the plunger directly over the drain and plunge vigorously several times. The pressure can help dislodge smaller blockages.
  • Test the drain by removing the plunger and running water to see if the water drains faster.

 
Clear the Drain with a Drain Snake or Auger
 

  • If the blockage persists, insert a drain snake (also known as a plumber’s auger) into the drain.
  • Slowly push the snake down while turning the handle. This twisting motion allows the snake to hook and break up any accumulated material.
  • Once you feel resistance, continue rotating and push further until the snake has reached the clog. Then, pull back to retrieve the debris.
  • Repeat the process if necessary until the snake moves freely through the pipe.

 
Flush the Drain with Boiling Water
 

  • After mechanically clearing the drain, boil a large pot or kettle of water.
  • Slowly pour the boiling water down the drain in stages, allowing time for it to work its way through the pipes.
  • This helps to melt down any remnants of soap scum or grease that might still be lining the pipe walls, further improving drainage.

 
Clean the P-Trap to Remove Hidden Clogs
 

  • If the drain still seems slow, consider removing the P-trap (the curved pipe under the tub) to inspect for stubborn clogs.
  • Place a bucket underneath to catch any water or debris that may spill, and unscrew the trap carefully.
  • Clean out the trap manually, washing away hair and gunk.
  • Reassemble the trap and test the drain to ensure proper flow.

 
Maintain Regular Cleaning to Prevent Future Clogs
 

  • Regularly remove visible hair and debris from the tub and drain cover.
  • Every few weeks, flush the drain with boiling water to discourage buildup.
  • Using a drain screen can also help catch particles before they accumulate inside the drain pipes.
  • These maintenance steps prolong the life of your plumbing and help avoid the need for more invasive cleaning methods.

 

In many households across St. Louis and Nashville, following these practical steps naturally supports a reliable and efficient drainage system.

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