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Why a filter is better than a softener for car washing.

Discussion in 'Autocare, Detailing, Valet, Product reviews' started by Morethanpolish, Mar 14, 2017.

  1. Morethanpolish

    Morethanpolish Active Member Authorised Forum Supporter

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    'I have a water softener so why do I need a water filter'?
    This may be useful if you were wondering...

    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 doesn’t 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. carnut13

    carnut13 Senior Member

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    What would be the running cost? How many washes do you get for a £45 refill?
     
  3. BernardB

    BernardB Senior Member

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    I bought a Race Glaze filter and it worked fine until the time came for a refill. I found emptying the resin very, very difficult. When I'd finally managed that, I found inserting all the new resin not merely difficult but impossible. So I gave it up as a bad job.

    I think the best way to avoid water spotting, even where I live which is one of the hardest water areas in the country, is to use a quick detailer after washing.
     
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  4. OP
    Morethanpolish

    Morethanpolish Active Member Authorised Forum Supporter

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    Sorry to hear that Bernard, but I'm also very surprised. We cant recall having heard it hard to empty the unit before to be honest.

    To empty the resin you just need to undo the top and pour it into your dustbin, rinsing out the last few bits. The trickier bit is getting the new resin into the vessel, but again, if you take your time, you can pour it in direct from the bag it comes in, tamp it down by tapping the filter on the ground and just do it up again.

    Our Refill Kits do make it easier. See: http://www.raceglaze.co.uk/race-glaze-water-filter-funnel-cap/
     
  5. OP
    Morethanpolish

    Morethanpolish Active Member Authorised Forum Supporter

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    How many washes ?

    We recommend that you use a filter for rinsing off the tap water left on the car after washing off your shampoo. This minimises the use of the filter and gives greatest economy. Normally customers with 1 car, washed weekly, get around a year before needing a refill. it saves loads of time, and potential marring too.

    Drop your water hardness (from your local water company website) into this handy calculator on our sister website: http://www.morethanpolish.com/maxi-filter-refillable-long-life-water-filter-system.asp
     
  6. Submariner1

    Submariner1 Senior Member

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    I live in an exceedingly hard water area ... the stuff comes out of the tap like diluted milk!!
    The best way I found was to wash the car and use a little Bosch garden blower ( reserved purely for the car ) and I just blow off the water.
    Never leaves a residue or any streaks and has the benefit of dry all the oodles of little chrome trim bits on a CL. So its all nice and dry for polishing etc.

    And you dont have to bend to dry it! No contaminated drying towels etc.
    Transformed washing this car .... whichever way you look at it, this is a BIG car! Lots of acreage to dry off.

    Also no cost of filters, which is good, as I am an avid advocate of copious rinsing pre and during the wash process to wash off grit.
     
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  7. such

    such Senior Member

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    i'm going to try using de -ionised water to rinse.
    I bought a load from ecp when on offer for less than £1.30 for 5l.
    I believe it should do the same thing - not leave any water marks when drying
     
  8. Craiglxviii

    Craiglxviii Senior Member

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    About ten years back I had a Hozelock car cleaning thingy that fixed to the hosepipe. It included a final spray that went through a "de-ionising filter". After rinsing the car off, one would spray this over the car and it would genuinely dry with no water spotting.
     
  9. turbopete

    turbopete Senior Member

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    unless its a car than never gets used, im not sure why anyone would bother with filters etc. ok, you dont get spots when the car dries after washing it, but so what? as soon as it rains, thats it stuffed anyhow!
     
  10. Frontstep

    Frontstep Senior Member

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    Heretic alert, I shall report you to detailers (car cleaners) UK !!

    I wash my car in Evian water, dry with organic cotton cloths then finish with a wax collected from bumble bee wings first thing in the morning.
     
  11. carnut13

    carnut13 Senior Member

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    Ok! Possibly a stupid question but what's wrong with rinsing down with a spray of rainwater from the rainwater butt? And then a quick wipeover drying it off?

    I live in a hard water area with a very dark blue car and spots from hard water from my mains supply drive me mad. Rainwater seems to be a satisfactory solution ( at no cost!!)
     
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  12. MalcQV

    MalcQV Active Member

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    There is probably an amount of grit in that rainwater, especially if it comes off your roof.
     
  13. carnut13

    carnut13 Senior Member

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    Yes but I use a grit guard. So given that is the rainwater a good solution??
     
  14. OP
    Morethanpolish

    Morethanpolish Active Member Authorised Forum Supporter

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    A wash bucket gritguard wont filter out the fine granules of grit off your roof, you'd have to filter it through fine gauze to do that, but if you rinse off with rainwater, why bother drying off with a towel after anyway ? Its defeating the object of using pure water to leave to evaporate, which saves the time and marring from physical drying.
    Water spots on cars are actually quite hard to remove, so if you do let them build up its creating a machine polishing job which will cost you in either time or cash. No-one seriously leaves a car to air dry after a tap water rinse do they ? (Or have I spent too long in the world of detailing?).
     
  15. turbopete

    turbopete Senior Member

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    yes you have. many people have to wash the car then take it out down the road 10 minutes later by which time its probably raining!

    i get the point of it all if the car is a garage queen/show car/little used toy, but for a daily workhorse?
     
  16. Submariner1

    Submariner1 Senior Member

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    You do that at your peril around here!
    A new neighbour not into cars did that 2x per week for 3 months and was left with white residue water marks. Even claying didnt remove it! ( not sure how well he did that ) but ended up paying for a machine polish. :(
    He has now bought a bosch garden blower :)
     
  17. OP
    Morethanpolish

    Morethanpolish Active Member Authorised Forum Supporter

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    Every week I wash our daily drives, our CLK and my old Range Rover, using the water filter, which saves me a good half hour each week.
    Irrespective of the additional benefit of no marring, not having to worry about drying and consequent water marks is well worth it. Plus the RR is huge.
    My garaged car is treated the same way, put into the sun to dry after its wash.
     
  18. Craiglxviii

    Craiglxviii Senior Member

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    What is this "sun" to which you refer?
     
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  19. BernardB

    BernardB Senior Member

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    Well, you would say that, wouldn't you, seeing as you sell this stuff?
     
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  20. Frontstep

    Frontstep Senior Member

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