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4040 Backwashing with salt
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slendersunfish
Cleanitup Full Member
Posts:
94
4040 Backwashing with salt
«
on:
September 18, 2012, 05:10:23 pm »
Ive been told that i should backwash my second hand 4040 ro with salt to add longevity to the membrane.Is this simply a case of putting salt in a small vessel, adding pressurized water back into the "wrong" side of the 4040 ro ?
Does anyone know
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Smart Carpet
Guest
Re: 4040 Backwashing with salt
«
Reply #1 on:
September 18, 2012, 05:20:00 pm »
No, you do not backwash your RO with salt, or with any water for that matter!
If you use Softener Resin then you must re-generate this with normal dishwasher salt before each fill.
With your RO, you should run the water with the waste open fully for 5 minutes before and after each fill*
*unless you have an automatic flush setup which will open the waste gate fully for you for a minute or two every hour that the RO is in use.
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Lee GLS
Cleanitup God
Posts:
3844
Re: 4040 Backwashing with salt
«
Reply #2 on:
September 18, 2012, 06:21:18 pm »
SALT WILL KILL YOU RO!!!!!
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Window Cleaner Dunmow
Window Cleaner Bishops Stortford
Spruce
Cleanitup God
Posts:
8465
Re: 4040 Backwashing with salt
«
Reply #3 on:
September 18, 2012, 07:46:13 pm »
A water softner removes the magnesium and calcium ions in the water and replaces them with sodium ions which is kinder to r/o membranes.
So salt water shouldn't damage your r/o membranes. Many desert countries rely on the desalination of seawater via reverse osmosis to provide drinking water.
The water mustn't contain chlorine, as the chlorine is what destroys membranes.
Flush as J WFP has advised using your flush valve and using water that has been passed through your sediment and chlorine block filter.
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4040 Backwashing with salt