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Thread: Why a filter is better than a softener for car washing

  1. #1
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    Default Why a filter is better than a softener for car washing

    'I have a water softener so why do I need a water filter?'

    This is a not unreasonable question as both systems improve the quality of your mains water but in very different ways.

    A water softener alters the make up of the dissolved minerals in the water whereas a water filter actually removes them to produce pure water with no dissolved mineral content. The resin in a water softener exchanges calcium and magnesium minerals for sodium based minerals. The limescale that you see around the house is basically calcium carbonate and a water softener converts the dissolved calcium carbonate to dissolved sodium bicarbonate, which is much more soluble than its calcium equivalent and does not form limescale and therefore allows soaps to work better and stops scale build up on things like bath taps, showers and shower screens and any other water using device.

    A Race Glaze water filter uses a slightly different resin that doesnít exchange anything, but simply absorbs all of the dissolved minerals in the water leaving nothing behind.

    For example, if you took an average 1 litre jar of hard water, the same volume of softened water and also filtered water, and then evaporated away the water and measured what was left, the hard water would typically have between 280 and 380 milligrams of minerals left behind (for a typical hard water area), the same for the softened water (only the minerals would be in a different form) while the filtered water would have less than 5 milligrams, probably closer to 1 milligram of dissolved minerals.

    It is these minerals that cause spotting on the car once washed and while the spots that occur with softened water are generally paler and not as noticeable as with hard water, they still occur. The filtered water with the close to zero mineral content will leave no spots however, as there is nothing left in the water to cause the spots.

    Race Glaze Refillable 0ppm Water Filters are available in 3 sizes at www.raceglaze.co.uk, from £99.00.

  2. #2
    Nosevi's Avatar
    Nosevi is online now There's an outside too? Where? Super Moderator
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    Not sure if mine needs refilling, Mark, haven't used it this year and I'm anal enough that I test the water coming out for ppm, but if it does how hard is it to refill and how much do refills cost? Mine is a stand up one that looks like a medium sized fire extinguisher.

    For anyone reading I highly recomend Mark's filters. I splashed out on a gucci looking expensive alternative before switching to a More athan Polish one and it was useless. When it finally stopped working at all I had to throw it away. Used More Than Polish's filter for a couple of years so far and it took practically all the particles out of very hard water.

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    francisn is offline Post whore with no life, no friends, and a problem fitting into normal social circles Admin dude
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    Quote Originally Posted by Nosevi View Post
    Not sure if mine needs refilling, Mark, haven't used it this year and I'm anal enough that I test the water coming out for ppm, but if it does how hard is it to refill and how much do refills cost? Mine is a stand up one that looks like a medium sized fire extinguisher.

    For anyone reading I highly recomend Mark's filters. I splashed out on a gucci looking expensive alternative before switching to a More athan Polish one and it was useless. When it finally stopped working at all I had to throw it away. Used More Than Polish's filter for a couple of years so far and it took practically all the particles out of very hard water.
    +1. One of the best things I have bought. Going to be using it tomorrow

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    Quote Originally Posted by Nosevi View Post
    Not sure if mine needs refilling, Mark, haven't used it this year and I'm anal enough that I test the water coming out for ppm, but if it does how hard is it to refill and how much do refills cost? Mine is a stand up one that looks like a medium sized fire extinguisher.

    For anyone reading I highly recomend Mark's filters. I splashed out on a gucci looking expensive alternative before switching to a More athan Polish one and it was useless. When it finally stopped working at all I had to throw it away. Used More Than Polish's filter for a couple of years so far and it took practically all the particles out of very hard water.
    If your using a TDS meter then it must read <10ppm for it to be effective, the resin is quite expensive and if your incoming water is >300ppm then it will get exhausted quite quickly, which is why I use R.O. filters to pretreat the water before it enters the resin filter.

  5. #5
    Nosevi's Avatar
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    Yep, it's a TDS meter I'm using. Just looked back through my photos and found 2 I took at the end of 2014 when I got a filter from More Than Polish. Water out of our tap:

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    Water once it has passed through the filter:

    Name:  IMG_5251.jpg
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    Pretty much the best advert I can give - it was 100% effective

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    Quote Originally Posted by Nosevi View Post
    Not sure if mine needs refilling, Mark, haven't used it this year and I'm anal enough that I test the water coming out for ppm, but if it does how hard is it to refill and how much do refills cost? Mine is a stand up one that looks like a medium sized fire extinguisher.

    For anyone reading I highly recomend Mark's filters. I splashed out on a gucci looking expensive alternative before switching to a More athan Polish one and it was useless. When it finally stopped working at all I had to throw it away. Used More Than Polish's filter for a couple of years so far and it took practically all the particles out of very hard water.
    Can't see the answer to this here?

  7. #7
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    Hi Folks

    Normally on a '1 washed car per week' basis the resin supplied with the original filter will last about a year. Pete obviously needs to get out more...

    Resin refills cost £45 and it a simple case of unscrewing the top of the filter, chucking the old resin into the landfill bin, rinse out the dregs and pour new resin in.

    You need to insert the long pipe first, tape over the top to prevent resin going into it whilst keeping it central, and re-screw the cap on. It takes no more than about 5 minutes. We do sell a Refill Kit which comprises a cap for the pipe and big funnel which is quite popular and can prevent spills.

    Ideally you need to run at least some water through it every 2-3 weeks, even if not actually doing a full car wash, if you dont you can get bacteria buildup, which smells like rotten fish. I can advise on an individual basis how to easily and very cheaply solve this (costs about 5p).

  8. #8
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    Sounds good, Mark. Mine's been sat for months and been in there a while so may as well change it now. Will put in an order shortly

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    francisn is offline Post whore with no life, no friends, and a problem fitting into normal social circles Admin dude
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    I used mine today. I've had it about a year and have used it about half a dozen times. It works very well, not perfect but teh small number of residual dryin g marks are quickly sorted.

    Geoff - what is an R.O. filter?

    F

  10. #10
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    milkshaker0007 is offline Only 37 known common faults - The Ferrari 355 Club Member
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    It's a Reverse Osmosis (tankless) filter

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