What is a CAT5 Booster Pump?
CAT5 compliant water booster pumps are designed to provide protection against back contamination of the water system caused by harmful waste/pathogens. The official definition of the water categories is available at legislation.gov.uk.
For over 20 years now it has been a legal requirement for CAT5 compliance, when water pumps are used in wash down applications or other high contamination risk environments.
Water pump usage, where there are risks of contamination, such as wash-down applications, have been subject to CAT5 compliance regulations for over 20 years.
Similar applications include: wash-down for bin-stores, vehicle washing, school laboratory water supplies, abattoir cleaning, hose pipes, outdoor taps at farms etc…
The protection against contamination is achieved by separating the incoming mains water supply from the boostable water, using an air-gap within a water tank. Water is supplied to the float-valve at the top of the tank and falls down into the tank itself. The float valve then shuts off the water when the level raises to a pre-set level, creating the air gap between the tank water level and the inlet. A correctly designed system also has weirs that allow water to overflow out of the tank on the extremely rare occasion the inlet valve might fail in the open position (shown as ‘Safety Gap’ in the diagram). This ensures that no matter what happens the air gap in maintained and the mains water system is protected from contamination.
Example CAT 5 Air Gap
The full version of the legislation is available here: https://www.legislation.gov.uk/uksi/1999/1148/contents/made
We offer three systems that are CAT5 compliant (PUK VARI GAP, PUK VARI TANK and the PUK FIX TANK) and here is a quick guide to understanding them.
PUK VARI GAP
PUK VARI TANK
PUK FIX TANK
Our team are always happy to advise you on the best system to suit your needs so please email us at firstname.lastname@example.org or call on 01322 292415.