What is a consequence of improper venting in an RV plumbing system?

Improper venting in an RV plumbing system leads to water siphoning from P-traps due to the negative pressure created in the system. P-traps are designed to hold a small amount of water to create a seal that prevents sewer gases from entering the living space. However, if the venting is inadequate, it can create a vacuum effect that pulls the water out of the P-trap, breaking the seal and allowing odors to escape. This detrimental effect compromises the functionality of the plumbing system and can lead to unpleasant smells in the RV, making proper venting essential for maintaining both hygiene and comfort.

Other aspects related to improper venting, while important, do not typically relate directly to the characteristic issue noted. Increased water pressure, damage to the water heater, and blocked sewage lines are more likely associated with other issues in the plumbing system rather than a direct consequence stemming from venting problems.