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Items 11 to 18 of 18 total

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Lamp Life

Monday, 8 June 2015 1:47:26 PM Pacific/Auckland

How long will my lamp last?

Lamps are meant to be replaced annually. Digital countdown ballasts are the reminder to do this.

UV lamps don't often die, but over time they do lose their 'killing power', so if your system needs to keep you safe at flow rates of up to say 100 Lm, then after a year the lamp might not be capable.

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0 Comments | Posted in Servicing By Wayne Cameron

Cleaning sleeves

Monday, 8 June 2015 1:31:53 PM Pacific/Auckland

When changing your lamp it is good practise to remove the quartz sleeve to clean both it and the chamber, and then refit with new seals.

Your UV system is an effective 'sentry at the gate' because if the water source is contaminated, the sleeve and the chamber will get coated. This means the UV light will not be able to penetrate the sleeve, and the living nasties will get a free ride through the chamber, and into your body.

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0 Comments | Posted in Servicing By Wayne Cameron

Changing Seals

Monday, 8 June 2015 1:13:50 PM Pacific/Auckland

You should change the quartz sleeve seals when you change the lamp.

This is to prevent seals from hardening and cracking and leaking.

Seals are fitted at each end of the sleeve. They prevent the water in the chamber (which is hot and under pressure) from escaping. 

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Comments | Posted in Servicing By Wayne Cameron

Pressure Gauge Readings

Monday, 8 June 2015 11:51:46 AM Pacific/Auckland

Getting the best out of your pressure gauges:

At zero water flow, mark the gauge at the needle (use a permanent marker pen)

At full flow with new cartridges, mark the gauge at the needle.

The difference between the 2 marks is your pressure drop (dP) with new 'filters').

As your filters 'plug' you can easily see how much lower the needle drops.

Each filter has its own gauge which helps identify the amount of plugging in each.

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Comments | Posted in Servicing By Wayne Cameron

Pressure Loss

Monday, 8 June 2015 11:43:08 AM Pacific/Auckland

I don't have enough pressure!

Typically you will lose only a few psi with new unplugged cartridges.

Pressure drop (dP) is a function of flow rate and restriction. The faster the flow and the greater the restrictions, the greater the dP.

Restrictions from plumbing distances and diameters are as important as how plugged your filters are.

Equally micron rating affects dP. To be effective, UV sterilisation requires filtration to at least 5 micron.

Trying to solve dP by using larger micron cartridges (say 50) defeats the purpose of the system - to keep you safe.

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0 Comments | Posted in Blocked Filters By Wayne Cameron

Blocked Filters

Monday, 8 June 2015 11:34:07 AM Pacific/Auckland

Plugging is the technical term for blocked filters.

  • The pores in a paper cartridge fill up with silt/mud/decayed leaf/pollen. Soaking and scrubbing can remove most of the plugging, except pollen. 
  • Look at the poly (density) cartridges end on; they visibly plug outwards (darkness spreads outwards from the smaller circumference insides).
  • Carbon cartridges simply stop working; the carbon surfaces get coated, and cannot touch the passing water.
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Comments | Posted in Blocked Filters By Wayne Cameron

Filter Cartridge Life

Monday, 8 June 2015 11:25:02 AM Pacific/Auckland

Short Answer: 6 months

  • Cartridges 'plug' (fill up / block) at a rate that depends on how much water you use, and how much debri is carried in the water. 
  • A very clean water supply such as 'city water' - change annually. 
  • A very dirty supply; such as a silt laden river; can plug your cartridges in a month or so.
  • Roof/tank water typically 6 or more months
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Comments | Posted in Blocked Filters By Wayne Cameron

When to change your systems filters.

Friday, 27 March 2015 10:26:14 AM Pacific/Auckland

One of the main questions we are asked is when to change filters on UV filtration systems. This is completely dependent on the quality and amount of water your system processes and the type and rating of filters you use.  In simplistic terms each filter has a Micron rating which indicates its density and therefore the restriction that it presents to the water wanting to pass through it. We find that the ideal (average) most popular filters used are 1 to 5 Micron. So a system may have a 5 Micron Pleated paper for the sands and sediment. A 5 Micron Carbon Block filter for taste and odour and a 1 Micron polishing filter for fine sediment and water discolouration.

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Comments | Posted in Servicing By Lee Gilson

Items 11 to 18 of 18 total

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