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  • Your toilet makes gargling noises.
  • Drains aren't draining.
  • Mold on walls.
  • An increase in pests
  • The toilet backs up when you flush. 

Ever wondered why your bathroom smells of sewer gas odor? Without access to outside air the vacuum in the system might pull air from another plumbing fixture. For example, flushing the toilet could pull air from the bathroom sink removing the water from the P-Trap. So if you smell sewage out of the sink drain after flushing, this could be a sign of a larger ventilation issue.

The P-Trap shaped piping is named after its shape. A small bend in the pipe to trap water creates a seal. This water seal prevents sewer gases and odors from leaking into your home via your drain.

As water drains from the bathroom sink basin via the P-Trap, it draws air from the outside vent to equalize the pressure. 

If the roof top vent is blocked by snow or some other debris then the trap seal could be sucked out by the draining the water. When this happens you might hear a gurgling sound as air is pulled through the sink drain. Thus, giving off a bad sewer odor via the bath tub drain.

S-Traps are similar to P-Traps, but are no longer installed in homes because they have the potential to lose the trap seal. If enough water travels through the S-Trap it will create a continued channel through the pipe and will syphon the water out of the Trap. 

Fortunately, the S-Trap can be retrofitted into a P-Trap. Also a build up of hair and other debris can create problems along the pipe and cause water to slowly dissipate out of the Trap by capillary action. This is why it is important to keep the P-Trap clear of debris.    

         Call  today:  SMARTPLUMBER & ROOTERS                                                                                                                                                                              408-247-2400


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