Soil Stack

Related terms

• Static Pressure

  Resistance to airflow in the duct system. High static (undersized ducts, dirty filter) overworks the blower and cuts capacity.

• Smoke & CO Alarm Requirements

  Code rules for interconnected smoke and carbon-monoxide alarms that a remodel of a sleeping area or fuel appliance typically triggers.

• Subpanel

  A secondary panel fed from the main, adding circuits for a remodel, addition, garage, or shop. Requires correct 4-wire feeder and isolate…

• Smart Thermostat

  A learning/Wi-Fi thermostat with scheduling, remote control, and usage reporting; many qualify for utility rebates.

• T&P Relief Valve

  The temperature-and-pressure safety valve on a water heater that prevents tank rupture. Must discharge per code; never plugged.

• Smart Switch

  A Wi-Fi/Z-Wave switch for app/voice/scheduled control. Many need a neutral wire in the box — a constraint in older homes.

• Tamper-Resistant Receptacle

  An outlet with internal shutters preventing object insertion, code-required in dwelling living spaces.

• Slope / Fall

  Drain pipe must pitch about 1/4 in. per foot — too little won't clear solids, too much drains liquid off solids. A frequent DIY error.