# What is gas water column?

3 min read

##### Asked by: Ben George

What is Inches of Water Column? Inches of water column is **a measurement of how much force it takes to push a column of water up by a number of inches**. It is typically used to measure low-pressure gas systems. How do you measure the gas pressure? You will need an instrument called a Manometer.

## What is water column in gas pressure?

This refers to **the amount of pressure it takes to raise a column of water 1 inch**. There are 27.7 inches of water column (wc) pressure in 1 PSI of pressure. So 7″wc is about 1/4 PSI. This is the normal pressure that household natural gas is delivered.

## What does water column mean?

Definition of water column

1 : **a vertical expanse of water stretching between the surface and the floor of a body of water** Shallow feeders, sea lions work the top 600 feet of the water column for hake, rock-fish, herring, sardines … and squid, but opportunistically capturing anything that happens by.—

## What does 11 inches of water column mean?

WC stands for Water Column and is measured in inches. It is **a measurement of pressure under 1 PSI**. Most gas companies deliver gas to your home at 11″ WC. 27.7″ WC is equal to 1 PSI.

## How do you measure a gas water column?

*Seven point six inch water column. So one PSI g equals twenty. Seven point six water column natural gas coming in is normally five to seven inch water column.*

## What is the difference between water column and PSI?

**One inch of water column is equal to a pressure of approximately 1/28 pound per square inch (psi)**. Stating this another way, a column water 28-inches high produces pressure that is equal to 1 psi.

## Is inH2O the same as WC?

The answer is **one inH2O is equal to 1 Water Column [Inch]**. Feel free to use our online unit conversion calculator to convert the unit from inH2O to Water Column [Inch].

## Is 2000 mm waterproof good?

The minimum standard for a jacket to be waterproof is 1,500mm so a jacket with a waterproof rating of 2,000mm would be **suitable for moderate rain**.

## What is water column in HVAC?

Inches of water column (inch WC) is **a measurement unit for measuring static pressure**. It’s a key metric for determining how much resistance air must overcome in order to reach the area it’s supposed to heat or cool.

## What does a water column look like?

*A water column is a conceptual column of water from the surface of a sea river or lake to the bottom sediments.*

## What is 2 psi in water column?

In this example, 2 pounds of pressure times 27.78 equals **55.56 inches** of water in a water column.

## What is the normal gas pressure for a house?

Natural gas piping systems in residential single-family and multi-family buildings typically operate at standard delivery pressure, **1/3 pound-per-square inch gauge**.

## How do you find a water column?

*Well there's a simple conversion. We've got 62 inches of water column. Between the gauge in the connection point. So we simply divide that by the 28. And that'll give us in PSI.*

## Why is natural gas measured in water column?

A typical residential gas system is a low-pressure system, meaning that the home is supplied with a gas pressure around 7 in. w.c. (inches of water column). The piping must be sized sufficiently enough **so that the pressure drop is a half an inch of water column or less, when all the gas appliances are on**.

## What does WC mean on pressure switch?

water column

All pressure switches have a specific trip point where the contacts close. The pressure switch in the photo will close at negative 0.30 inches of **water column** (wc).