Plumbing Terminology - I

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An increaser is a plumbing drainage fitting that enlarges the diameter of a straight-line run by virtue of its larger size on one end and smaller on the other. If it is used for the reverse, to make the diameter of a straight-line run smaller, it is called a reducer.


With Influent is meant the water entering the pump, the filter or other equipment of space. Water going into the pump is called in influent, while water leaving the pump is called the effluent.

Insulated Toilet Tank

An insulated toilet tank is used to prevent sweating of the toilet. Many toilet tanks can be order with this feature which helps prevent the tank from “sweating”. Pressure assisted toilet tanks are usually suggested and don't require any special insulation.

Integral Stop

An integral stop is a stop that allow the owner to shut off the water supply at the faucet for maintenance without shutting off the main water supply to the entire facility or home.


An interceptor is a device designed and installed in order to separate and retain deleterious, hazardous or undesirable matter from normal wastes while permitting normal sewage or liquid wastes to discharge into the drainage system by gravity. This definition applies to any intercepting device to be installed on the sanitary sewer or the storm sewer systems.


An ionizer is a water-sanitation device that uses electricity to generate metal ions, which are dispersed in the water. It works by passing a low-voltage DC current through a set of metallic (usually copper and silver) electrodes placed in line with the circulation equipment. The copper is an algaecide, while the silver is a bactericide. Does not remove swimmer waste.