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Why Does My Shower Drain Smell Like Sewage?

Posted On Wednesday, 26 October 2022 20:06
Why Does My Shower Drain Smell Like Sewage?

A cunning sewage odour greets your nostrils as you enter your restroom, prompting a wrinkled brow. Odours aren't uncommon in bathrooms, but this one smells quite strange.

You sniff the bathroom, get closer to the sink drains, and shower before settling on the toilet. This is the drain for your bathroom shower!

Most people's nostrils wrinkle at the thought of the noxious odour of sewage coming up from the shower drain, which motivates them to seek an ideal plumbing services solution as soon as possible. After all, the unpleasant smell of sewage at the place you go to clean can make you feel unclean even after a shower.

Some of the most prevalent causes of a sewer-like odour coming from your shower drain are discussed below.

  1. 1. Dry or Filthy P-Trap

Under the shower, you will find the P-trap attached to the drain. This U-shaped pipe segment is a shower drain line accessory that extends below the floor. The form catches a tiny amount of water in the drain line, preventing sewer gas from rising via the shower drain. 

A foul odour might be released from the drain if dirt, grime, hair, oils, and other material are gathered in this pipe. Stale scents can be eliminated from a room with a dirty P-trap by simply cleaning and disinfecting it. 

You can use chemical cleansers to get rid of the dust and debris that has settled inside the P-trap, but if you're worried about getting those chemicals into your plumbing system, there are other options to consider.

  1. 2. Trapped Shower Drain

It's possible for shower drains to become clogged with bits of soap, shower gel, dead skin, hair, and other debris. Clogged shower drains can cause sewage to back up into your bathroom and cause minor flooding when you take a shower.

The fix for this is simple, and you can implement it independently. It's not always clean, though. If you'd rather not get your hands filthy, a maintenance specialist can be called in. You should do this if you want to tackle the project independently. 

Unscrew the shower drain cover first. Slowly and continuously pour a mixture of vinegar and hot water down the drain. After two hours, add one cup of baking soda and let the mixture sit.

  1. 3. Leak Pipes

Sewage odours can rise from the drain or even permeate the walls if there is a breach in the drain line. Therefore, fixing it as soon as possible is essential. There must be a downward slope and connection to the main drain for the shower's wastewater to be able to leave the house. 

If there is a breach in the drain pipe, wastewater will likely spill out into the yard or basement, soaking the insulation and the walls and floors.

Leaking wastewater will not only cause unpleasant aromas. Still, it will also deteriorate the drywall, insulation, framework, and anything else it comes into contact with if the problem is not fixed as soon as feasible.

  1. 4. Formation of Biofilm

To put it simply, biofilm is a substance that resembles mould but is produced by a living bacterial colony and its byproducts. It looks like muck or slime and comes in various colours, the most prevalent of which are pink and orange. 

This slime can accumulate in the drain and seep into the shower, creating a musty, unpleasant odour. Biofilm has a sticky, slimy consistency and sticks to surfaces like glue.

  1. 5. Filled Septic Tank

A septic tank could be full if there is a sewerage odour in the bathroom and the drains in your building are connected to one. Septic overflow tanks produce an odour that is not limited to sewage. You may notice gurgling sounds from the bathroom plumbing, and your toilet may slow down.

When a septic tank becomes full, the answer is simple: drain it. If you don't want to be caught off guard by a full septic tank, you should check the level of the tank regularly.

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