Practice Mode

Straight Drain Run

Place straight pipes and a P-trap in a simple vertical drain

Direction Changes

Route a drain using all 4 elbow rotations in a zigzag pattern

Size Transition

Use a reducer to step down from 2" to 1.5" pipe

Reducer Chain

Step down through 3 reducers: 2" → 1.5" → 3/4" → 1/2"

Tee Junction

Use a tee to redirect flow at a branch point

Coupling at Endpoints

Couplings join new pipe work to the existing system at START and END

Clean-Out Compliance

Clean-outs must be placed near direction changes for access

Basic Duct Run

Route rigid duct with elbows in an L-shaped path

Flex vs Rigid

Limited rigid duct — use flex duct where needed (20% less efficient)

Trunk Step-Down

Step a 12" trunk down to 8" using duct reducers

Duct Tee Branch

Use a duct tee to split flow with a horizontal reducer

Full HVAC System

Build a complete system from plenum (start) to register boot (end)

Obstacle Course

Route ductwork around beams, pipes, and walls

Open Plumbing

All pipe types and sizes, no target layout, freeform

Open HVAC

All duct types and sizes, no target layout, freeform