The 24-Hour Drain Fill Test
Filling every drain and vent stack with water before the walls close up, to catch a hidden leak while it is still cheap to fix.
Drains
Clearing and repairing drain lines and traps.
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Techniques
The P-Trap Explained
What the curved pipe under the sink actually does, how to check its water seal, and why S-traps were outlawed.
Drain a P-Trap Without a Bucket
Rotating the trap assembly on its wall stub so the trapped water pours down the drain line instead of into the cabinet.
Leak-Proof Slip Joints
Keeping under-sink drain slip joints from loosening and weeping.
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