What Is a Surrey Flange?

Written by contributing writer | 13/05/2017
What Is a Surrey Flange?
Surrey flanges are frequently used in shower heads. (shower image by Ekaterina Shvigert from Fotolia.com)

A Surrey flange is a type of fitting that is used to expel air out of hot water before it goes through the outlet it is fitted around. These fittings are generally used in shower heads or other hot water cylinders.


What Is a Surrey Flange?
Flanges are cylindrical and connect one supply to another. (pipework carrying water in a treatment plant image by Heng kong Chen from Fotolia.com)

The purpose of a Surrey flange is to connect a hot supply pipe with a hot tank. The alternate name for a Surrey flange is a Danzey flange. It is intended to go on top of a hot tank so that it can replace a pre-existing connection.


What Is a Surrey Flange?
(absperrhebel image by Gerald Sauer from Fotolia.com)

Surrey flanges are designed to help prevent air bubbles from escaping through a pump and therefore causing unnecessary wear and tear on it. The Surrey flange also keeps water in the shower from turning suddenly cold when another source of water pressure in the house or apartment is turned on.


Surrey flanges can look very similar to other types of flanges. When purchasing one, be sure that you do not confuse it with the Warix flange, which has a female adaptor that connects to a male tank.


The use of flanges, and Surrey flanges in particular, have greatly aided in the even distribution of water in individual plumbing systems. It lessens the chances for the overflow of a water tank and promotes the even flow of water.


The Surrey flange has reinforced the essential nature of plumbing equipment in modern society. Its facilitation of water dispensation and equilibrium is something that people in Western civilisations have grown accustomed to.

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