: Ultraviolet


wgp-uvOur range of ultraviolet sterilisers are ideal for either domestic or commercial use. The most popular size UV starts from 6 gpm (US) or 5 gpm imperial (23 litre/min). These would be classed as a basic size domestic household ultraviolet steriliser.

The next size model of UV, the 12gpm (US) or 10 gpm imperial (45 litre/min) larger household or light commercial ultraviolet disinfection system handle higher flows. Both sizes are the most popular quality UV systems sold in Galway and Ireland.

Ultraviolet sterilisers require 5 micron pre-filters stated by manufacturer and HSE. These are offered as separate system parts, or as part of our installations, or as part of our new board mounted UV systems with pre-plumbed 5 micron pre-filter.

Rated as top end quality UV systems, they can be discounted when part of a water softener package or water filter combination. The ballast is highly stable with wide range voltage design offering from 2 year warranty cover for low cost service.

When installed by Galway Water, our ultraviolet systems come with a 10 year parts and labour warranty. This is the longest warranty in the industry covering the main system parts. The costs to buy and run our systems are the best on the market.

Service call outs are available for annual ultraviolet lamp changes, or a 2 pack DIY UV lamp and 2 pack 5 micron pre-filter bundle can be offered at 40% off the normal year to year servicing costs.  Also 4 pack or 6 pack up to 60% off.

Ultraviolet Information

Using ultraviolet disinfection to sterilise water borne bacteria began in the 1960’s and later on Atlantic Ultraviolet, Trojan Ultraviolet and Wedeco Ultraviolet developed commercial UV systems.

Due to the success of ultraviolet sterilisers, affordable ultraviolet systems became available backed by health authorities for safe bacterial UV sterilisation of bacterially contaminated water supplies.

Ultraviolet disinfection is the safest and most effective form of bacteria steriliser with working efficiences of up to 99.999999%.

This allows a calculated flow of infected water to be passed in contact with a high intensity ultra violet (UV) light source deactivates the reproductive DNA and RNA of viruses, bacteria and cysts, rendering them harmless leading to swift cell death.

Ultraviolet disinfection systems for household use typically operate on 20 to 40 watts and require a new ultraviolet replacement lamp every 12 months along with a 5 micron prefilter cartridge, as the optimum UV light output starts to degrade after 9,000 hours of use or 1 calendar year.

Ultraviolet lamps work best on water free of water hardness, colour and turbidity that obstruct the transmission of ultraviolet rays. Unless water is naturally soft, sourced from a granite rock area, a water softener can be used.

Health authorities rate safe levels of contamination as less than 1 organism in 10 litres of mains water, or less than 1 colony forming unit (cfu) per 100 mls of sample water, or up to 99.95% bacteria removed from supplies.  Ultraviolet bacteriocidal units are effective well above the 99.95% sterilisation range.

When levels of contamination are recorded in a water supply by measuring an average level of pathogens per litre of water, it becomes easy to calculate a safe threshold for drinking use. If a mains water scheme has established a good track record of disinfection using modern treatment, the level of post treatment at domestic level should be able to be kept to a minimum.

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