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Large Ultra Violet System Up to 79L / minute Flow with Pre Filter

High Quality Ultra Violet System and Pre-Filter

Brand new, unopened from the factory

Designed for 79 Litre per / min Flow Rate

For Large properties / Heavy Usage

Works on UK Mains electricity/Three pin plug

Kit includes everything you need

No Quibble Money Back Guarantee if Not Totally Satisfied

Todays Price
£1,196.40INC VAT
£200.60 (-14%)
Our Usual Price
£1,397.00 INC VAT
In stock | Only 80 left at this price | Next Day Delivery
Free Delivery & Returns
Order before 3pm for same day dispatch today

"One of the most customer aware on line businesses around. Service is very efficient and when I have had the need for any assistance, they have been extremely thoughtful."


UK Water Filters Promise

If you change your mind about your purchase, for any reason, within 90 days, you can return your product for a full and complete refund. PLUS we will pay for your return postage (UK)

All orders shipped same day before 3pm

Free Delivery & Free Returns

(We’ll even pay your postage!)

3 Year full parts warranty

What you get
Product Description

ClearLight™ Ultra Violet System - Up to 79L per min

The 'perfect solution' for people with private water supplies

This is one of the larger size Ultra Violet system we stock.

It's designed for a flow rate of up to 79 litres per minute.

This is a high rate and would usually be for a larger property / house or a light industrial property on a private / non-mains water supply.

Is This the Right Size for You?

UltraViolet filters should be sized according to the flow rate of water going through them.

Flow rate is different to water pressure ie "Bar". (This is because, for example, 3 Bar of pressure will result in a different flow rate on a 15 mm vs a 22mm diameter pipe).

You can read more about your flow rate, and how to measure it here

Check the UV Filter Size Chart

There's no point in getting a UV filter that's either too large or too small. Checkout this chart where you can click through to your right size filter.

It includes the variations between being "off grid" vs on normal mains electricity

More info here Getting the Right Size Ultra Violet filter

Off Grid?

This unit requires mains electricty.

We do supply 12V 'off-grid" UVs, but only up to 22L/minute.

If you need a larger off-grid electricity UV then a solution is to buy smaller 12V UVs and split your incoming water so that it flows equally through the smaller UVs (Note the water needs to be split on a "manifold" basis - ie so it passes equally between the smaller UV units - not made to flow “in series”.)

A plumber should be able to arrange this easily.

You can see a chart of the smaller 12V off grid UV units here.

We might be able to offer you a discount for buying more than one unit. Contact us to discuss your needs.

Pre Filters

UV systems are long thin tubes with what looks like a fluorescent bulb sitting in the middle. (This is the UV lamp).

The incoming water flows down the tube, around the UV light/lamp.

Any micro-organism (ie bacteria and viruses) that are hit by the light will be rendered harmless.

However any sediment / particles might create a "shadow effect" / "umbrella effect" and help the micro-organism to escape bieng exposed to the UV light.

The pre-filter removes these sediment / particles.

Running Costs

The UV lamp/bulb needs changing every 12 months. This is regardless of usage. (For example; if you go away for a few months, to ensure total safety you would still need to change the lamp/bulb 12 months after installation.

Cost of replacement lamp for this unit £167. (Check the product page for current quantity / discount deals).

The pre filters change rate will vary*. It depends on how much sediment / dirt they trap. This varies with the quality of your local incoming water - which can change after storms etc.

Assume the pre filter cartridges will last at least three months.

Cost of replacement pre-filter cartridge for this unit £25 (Check the product page for current quantity / discount deals).

How to Order

If you're happy that this is the right unit for you you can go ahead and order it anytime 24/7 on the Money Back Guarantee basis.

Simply use the "Add to Your Basket" button at the top of the page

Or if you're not sure yet then you can contact us by email with any questions, for a speedy response, or call us during office hours.

Further Information on UV Filters

High vs Low Quality UV Water Filters

How to find your water's flow rate

Getting the Right Size Ultra Violet filter

Off grid / Solar Power 12V DC and Other non-mains electricity sources

How much electricity does a UV use / Costs

Frequently Asked Questions


With FREE Delivery

Immediate Dispatch

Purchase with Total Confidence

Money Back Guarantee

Click here for delivery information

No hidden extras

If you don't like what you get, send it back for a full no quibble refund.

If for any reason you decide to return your purchase we promise you a no questions asked THREE MONTH Money Back Guarantee. Click here to read the "large print" about our Money Back Guarantee.

PLUS We'll even pay your return postage !

Please order now to secure today's sale price.


Product Code: UKWF-UV79L

Very Large Ultra Violet Filter
Technical Information

Maximum Flow

4740 L/hr (79 L/min)

Inlet / Outlet Connections

1 Inch NPT

Total Unit Power W


UV Unit Dimensions

Length: 101cm

Diameter: 9cm

Pre Filter Unit Dimensions

Height: 80cm / 32in

Width: 44cm / 17in

Weight: 5.6kg

Delivery & Returns

Free Second Class - up to 5 days (90% arrive in 3 days)

First Class - up to 2 days (95% next day delivery)

Free Returns and Money Back Guarantee. Full details

Free Lifetime Support

If you have any problems

... or concerns with your purchase we are here to help.

We are not "here today gone tomorrow" merchants.

A quick look at our Customer Feedback

... and our Money Back Guarantee should help reassure you that we are an honest firm who will give you a first class, long term service.

How to get help

Call our help line on 020 8761 6611 at any time during UK office hours ie 9 am to 6 pm

Or email us for a rapid response.

Our policy is always to get back to you within an hour - or one working day at most.


In addition to your 3 Year Warranty, if for any reason you change your mind about your purchase within 90 days of receiving the goods, you can return your product for a full and complete refund *

PLUS we will pay for your return postage (UK only)

*This applies to individuals/ consumers using the products in domestic settings. Businesses please see our terms and conditions

Delivery Times

Order before 3 pm on any working day and we guarantee your order will be sent out the same day (not on weekends)

(To be honest we often manage to send them even after 3pm. But we can't promise that).

All prices on the website include delivery charges and VAT except where stated otherwise.

Delivery Charges

Your Standard "Free Delivery Included" is Second Class

This usually takes between 3 to 5 working days ie does not count weekends or Bank Holidays

Pay Extra for First Class

You also have the option at checkout to pay extra for First Class.

This should result in next day working delivery to mainland UK.

BUT please note while 95% do arrive next day this is not guaranteed.

However arrival within two working days is almost certain.

You can see your delivery costs at the checkout stage before you buy.


Over 30,000+ happy customers

The great majority keep coming back for years because they like our friendly, helpful service and great value prices.

Free Delivery & Returns

All Orders Shipped Same Day Before 3pm

3 Year Full Parts Warranty