hot water cylinder

Essex flange

An Essex flange is a fitting on a hot water cylinder which prevents a device, such as a shower pump, from being damaged by air. It does this by drawing off water from the side of the cylinder. When water in the cylinder is heated by the coil or the immersion heater, air bubbles form. The top …

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Surrey flange

A Surrey flange is a fitting on a hot water cylinder which prevents a device, such as a shower pump, from being damaged by air. It does this by drawing off water via a tube which dips down into the main body of hot water. When water in the cylinder is heated by the coil …

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