SOPpal
Try the demoStart free

Free sample · interactive 3D training

Traps, vents and why drains gurgle

Watch a sink drain: how the water seal in the trap blocks sewer gas, how a vent lets air in so the seal holds, and what goes wrong without one.

Preview of the Traps, vents and why drains gurgle simulationFree · details needed to open

Enter your details to open this simulation

It is free and takes a minute. We will only use your details to follow up about SOPpal, and never share them.

We will only use this to follow up about SOPpal. See our privacy policy. You can ask us to delete it any time.

Hands-on practice

Fix a gurgling sink

A customer says their sink drains slowly, gurgles and sometimes smells like a sewer. Work out why and fix it.

Click the Practice button in the player. You click parts in the 3D model and make the calls a technician would, with hints, feedback and a star score. Inside SOPpal, finishing a task earns XP.

Start the practice task

Training your crew with simulations like this

SOPpal pairs 3D simulations with lessons, quizzes, XP and tracking, so technicians see how a system works and you see who has finished. The training library covers HVAC, plumbing, electrical, roofing and seven more trades.

Try a sample companySee the Plumbing courses