Beneficial microorganisms that require oxygen to break down organic waste in septic tanks and treatment systems. These bacteria are commonly used in aerobic treatment units (ATUs) to improve wastewater quality before it enters a drainage field or leaching system.

Microorganisms that break down waste without oxygen, typically active in traditional septic tanks. Though less efficient than aerobic systems, they are common in rural wastewater treatment.

A condition where water cannot pass through a pipe due to a clog caused by grease, debris, tree roots, or foreign objects. Common solutions include snaking, hydro jetting, or chemical cleaners.

A secondary drainpipe that connects individual fixtures (like sinks or tubs) to the main house sewer trunk. It carries wastewater toward the central system and is crucial in household drainage design.

A grated, below-ground structure designed to collect stormwater runoff and prevent debris from entering the sewer system. Often found in urban drainage systems and connected to channel drains

A surface-level trench-style drain with a removable grate, used to redirect water from driveways, patios, or garages to prevent pooling and erosion. It links with stormwater systems and catch basins.

Liquid or gel products that dissolve or loosen clogs in residential drain pipes. While effective against grease and hair, frequent use can corrode PVC pipes and damage plumbing systems.

A diagnostic method using waterproof closed-circuit television cameras to inspect sewer or drain lines. CCTV inspections reveal cracks, tree root intrusions, blockages, and pipe misalignments without excavation.

Also called a leach field, it disperses treated wastewater from a septic system into the soil. A critical component of onsite sewage disposal, it relies on soil permeability and proper bacteria balance.

A flexible cable or auger tool used to break apart clogs in drain lines or toilet traps. It is a manual or powered method of mechanical drain cleaning used before escalating to hydro jetting.

The complete network of pipes, fittings, vents, and traps that collect and remove wastewater and stormwater from a building. It includes stacks, branch lines, house drains, and sewer mains.

Wastewater from toilets, sinks, and other sanitary fixtures. It must be directed into foul water drainage systems or sewer mains, not combined with stormwater drainage.

A plumbing device installed in commercial kitchens to intercept fats, oils, and grease (FOG) before they enter the drain system. Essential for code compliance and preventing sewer blockages.

The primary underground pipe that carries wastewater from a building to the municipal sewer main or septic tank. It connects all internal drainage branches and is often subject to CCTV inspections.

A drain cleaning method that uses high-pressure water jets to remove blockages, scale, grease, and debris from pipes. Often used when snaking is ineffective, and ideal for cleaning long or commercial sewer lines

A network of pipes that removes wastewater and directs it to a sewer or septic system. It includes traps, vent stacks, branch drains, and main lines, working under gravity-based flow principles.

A pipe fitting used to change the direction of flow, typically at 45° or 90°. Common in tight plumbing layouts, elbows are essential in routing water efficiently.

A small tank connected to a water heater or closed-loop system to absorb excess water pressure due to thermal expansion. It helps prevent pipe bursts and valve failures.

An internal component that regulates water flow and temperature in single-handle faucets. Replacing a worn cartridge can resolve leaks and inconsistent water pressure.

A device connected to a plumbing system that interacts with water, such as sinks, toilets, or bathtubs. Fixtures are fundamental to both residential and commercial plumbing design.

A rubber or plastic valve inside a toilet tank that lifts to allow water to flush and then reseals. It’s a frequent culprit in running toilets and water waste.

A device installed in fixtures like faucets and showerheads to limit water flow, conserving water and improving efficiency while maintaining adequate pressure.

Located in a toilet tank, it releases water into the bowl during flushing. Often integrated with the flapper, it determines flushing power and water usage.

Steel piping coated with zinc to resist rust, commonly used in older homes. Over time, it corrodes internally, reducing water flow and quality.

Wastewater from showers, sinks, and appliances (excluding toilets). Often reused for irrigation or flushing, it’s part of sustainable water management systems.

An outdoor faucet that connects to a garden hose, often freeze-proof in colder climates. It connects to the building’s main water supply and can be shut off via an angle stop or shut-off valve.

A device that heats and stores water for domestic use, powered by gas, electricity, or solar energy. Common types include tank-style and tankless water heaters.

A drain cleaning method that uses high-pressure water to blast away clogs and buildup. Common in commercial plumbing for clearing grease, roots, and debris from sewer lines.

A device designed to separate and trap specific contaminants (like sand, oil, or grease) before they enter the sewer system. Grease interceptors and oil interceptors are required in commercial plumbing systems.

The unwanted entry of groundwater into sewer lines through cracks or faulty joints. Infiltration increases treatment loads and can overwhelm wastewater treatment plants during heavy rain.

Another term for drainage field, where pretreated effluent from a septic tank is absorbed into the soil. It plays a vital role in filtering bacteria and nutrients before they reach groundwater.

The primary horizontal pipe inside a building that connects all branch drains to the house sewer trunk. Clogs in the main drain can affect all fixtures simultaneously.

An access point in a sewer system allowing inspection, cleaning, and maintenance. Manholes are positioned at junctions, changes in pipe direction, or elevation drops.

A soil test that determines the drainage capacity of land for installing a septic system. It assesses how quickly water is absorbed, which affects leach field sizing.

The growth of tree roots into sewer pipes through small cracks or joints. It causes blockages and pipe damage, often detected during CCTV inspections and removed via hydro jetting or cutting tools.

A sewer system that carries foul water from toilets, sinks, and appliances to a treatment plant. It is separate from stormwater drains in modern urban planning.

An onsite wastewater treatment system used in areas without municipal sewer service. It includes a septic tank, distribution box, and drain field or leach bed.

A mixture of gases produced by decomposing organic waste in sewers. Typically includes methane, hydrogen sulfide, and ammonia. Proper venting prevents these gases from entering buildings.

A method of mechanical drain cleaning using a flexible cable (drain snake) to clear clogs. Often used for kitchen sinks, showers, and toilets before advancing to more intensive solutions.

A drainage system that channels rainwater and runoff from roads, roofs, and paved areas into nearby water bodies. It must remain separate from sanitary sewers to prevent overflow.

A curved pipe (like a P-trap or S-trap) designed to hold water and block sewer gases from entering living spaces. Traps are required under every fixture and must maintain a trap seal.

The water retained in a trap that forms a barrier against sewer gas. Loss of the trap seal due to evaporation, siphoning, or negative pressure leads to odors and health risks

A vertical pipe that allows air circulation in the drainage system, preventing back pressure and maintaining water flow. Connected to trap arms and stacks, it is essential for proper drainage.

A vertical drain pipe that carries wastewater from multiple floors to the main drain or house sewer. Types include soil stacks, waste stacks, and vent stacks, all critical to proper drainage function.

A type of sewer system that carries both stormwater runoff and sanitary wastewater in the same pipe. Common in older cities, combined sewers can overflow during heavy rain, releasing untreated water into natural bodies — a process known as CSO (Combined Sewer Overflow).

An engineered landscape feature designed to capture and filter stormwater runoff into the ground. It reduces the burden on storm drains and helps recharge groundwater, playing a key role in green infrastructure and sustainable drainage.

An open or enclosed structure that collects and conveys surface water. It can refer to natural features (like ditches) or engineered solutions (like trench drains) and is integral to flood prevention systems and runoff management.

A shallow, sloped vegetated channel used to slow and filter stormwater. Swales are a form of Low Impact Development (LID), often integrated into urban landscapes to improve drainage and reduce reliance on piped stormwater systems.

The unintended entry of stormwater or groundwater into sanitary sewers. Inflow comes from surface sources (like manhole covers), while infiltration enters through cracks. I&I increases treatment loads and is a major concern in municipal sewer maintenance.

An event where a combined sewer system discharges untreated wastewater into the environment due to excess flow. CSOs are regulated by environmental agencies and are a major driver of green infrastructure investments.

A stormwater management facility that temporarily stores runoff and releases it at a controlled rate into drainage systems or natural waterways. Unlike retention basins, it does not maintain a permanent pool of water.

A plumbing device that prevents sewage from backing up into a home or building during periods of high flow. Required by code in some jurisdictions, especially for properties connected to combined or aging sewer systems.

An engineered network of structures — including catch basins, culverts, detention basins, and green roofs — designed to control and treat runoff. These systems are critical for preventing urban flooding and protecting water quality.

A man-made basin designed to collect and hold stormwater permanently, allowing for sediment settlement and biological treatment. Unlike detention basins, retention ponds maintain a constant water level and are used in urban drainage planning.