High-efficiency plumbing appliances refer to clothes washers, dryers, dishwashers, and water heaters that use 10% to 50% less energy and water than other models.

A high-efficiency plumbing appliance can be identified by the HE certification mark.

Automatic clothes washers are manufactured in two general types, top-loading and front-loading.

Three types of residential automatic dishwashers are freestanding, under-counter, and integrated.

The wastewater from a clothes washer normally is classified as gray water.

A modern automatic clothes washer has two drums, one situated inside the other.

Modern automatic clothes washers use belts and pulleys to drive the drum

A flexible water connector is a non-rigid tube or hose with end connections used for connecting a water supply to a fixture, fitting, or appliance.

Wastewater from automatic clothes washers is permitted to be directly connected to the drainage system.

An air gap coupling creates an air gap within the fitting, meeting the requirement of vertical separation and preventing backflow into the dishwasher.

A food waste disposer is a plumbing appliance installed in a household kitchen sink outlet, supplied with water from a kitchen sink supply faucet, and discharging into the household plumbing drainage system.

Commercial dishwashers are not required to drain by indirect waste to an indirect waste receptacle.

An automatic water softener is a water softener equipped with a programmable demand timer control unit to automate the softening process and regeneration cycles of the softener.

When installing an automatic water softener, the time of day and the water hardness number should be programmed into the demand timer control.

A plumbing fixture connected to only a potable water supply is a(n) ___.

An ENERGY STAR® qualified model dishwasher uses ___ gal. of hot water per cycle.

Clothes washers are manufactured in ___ basic sizes based on the laundry compartment volume in cubic feet.

Most clothes washer manufacturers recommend using ___ foot flexible water connections.

Because the automatic dishwasher solenoid valve is a quick-closing valve, the water supply system should be protected from ___.

___ applies specifically to food waste disposers.

Food waste disposers are required to ___.

According to food waste disposer standards, food particles ___ or larger will not be able to pass beyond the grind rings

According to food waste disposer standards, food particles will be ground to a minimum of ___ prior to disposal into the drainage system.

Most finished water supplies contain from ___ gpg to 50 gpg of calcium or magnesium.

___ is a synthetic resin bead used as the ion-exchange media in the water softener ion-exchange/cation process.

___ water softeners can often be installed without changing the plumbing system.

A(n) ___ is an instrument or device designed for a particular use or function or a piece of equipment for adapting a tool or machine to a special purpose.

___ is a U.S. Environmental Protection Agency voluntary program that helps businesses and individuals save money and protect the climate through superior energy efficiency.

___ clothes washers tumble clothes through a small amount of water instead of rubbing clothes against an agitator in a full tub.

An automatic washing machine water ___ is a device which controls the flow of water to a clothes washer by sensing the flow of electrical current to the clothes washer.

A(n) ___ sensor can shut off the water to a clothes washer if it detects pooling water on the floor.

The wastewater from an automatic dishwasher is classified as ___ water and should be treated accordingly.

An automatic ___ is a plumbing appliance supplied with potable water and automatically washes, rinses, and dries dishware.

Plumbing codes require that the water supply to an automatic dishwasher be protected by a(n) ___.

A(n) ___ automatic water softener is a water softener that has its mineral tank integral within its brine tank.

A(n) ___ in a food waste disposer impels food waste through centrifugal force against the grind ring where it is pulverized by abrasive or grinding action.

The two types of residential food waste disposers are ___ feed and continuous feed disposers.

A(n) ___ is a plumbing appliance that removes sand, sediment, chlorine, lead, and other undesirable elements from water and protects water heaters and other fixtures and appliances from collecting residue.

A(n) ___ is a plumbing appliance that removes dissolved minerals, such as calcium and magnesium, from potable water through an ion-exchange process.

A(n) ___ water softener is a device that uses a magnetic or electrostatic field to alter the reaction between scale forming ions in hard water.

The ___ filtration process removes lead, chlorine, volatile organic compounds (VOCs), and sediment from drinking and cooking water, depending on the water filter element installed in the water filter.