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Rocket water filter
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Discussions > Espresso > Machines > Rocket water...  
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ohills
Senior Member


Joined: 14 Mar 2012
Posts: 16
Location: oceanside,ca
Expertise: Just starting

Espresso: Rocket Giotto Evoluzione V2
Grinder: Vario
Posted Wed Dec 12, 2012, 12:38pm
Subject: Rocket water filter
 

Anyone using the in tank rocket water filter.  If yes, have you taken a TDS reading to see if it actually lowers the TDS in your water.  I have mine installed in my new Giotto Evoluzione and it doesn't seem to lower my very hard water here in southern California.  My tap water is 350 ppm.
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DavecUK
Senior Member


Joined: 21 Sep 2005
Posts: 1,461
Location: UK
Expertise: I love coffee

Posted Wed Dec 12, 2012, 4:19pm
Subject: Re: Rocket water filter
 

It won't change the reading on a TDS meter, because it's an Ion Exchange resin.....works by exchanging calcium Ions for Sodium Ions. So Calcium Carbonate which causes lime scale, becomes Sodium Carbonate, which doesn't scale. As it's a 1 for 1 exchange of a conduction Ionic solution, the TDS remains virtually unchanged.

Now that's not to say in-line softeners are great as I imagine they become exhausted pretty quickly, but are easily regenerated using a salt solution and then a rinse through with fresh water.
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ohills
Senior Member


Joined: 14 Mar 2012
Posts: 16
Location: oceanside,ca
Expertise: Just starting

Espresso: Rocket Giotto Evoluzione V2
Grinder: Vario
Posted Wed Dec 12, 2012, 6:07pm
Subject: Re: Rocket water filter
 

How would you know when to recharge?

DavecUK Said:

It won't change the reading on a TDS meter, because it's an Ion Exchange resin.....works by exchanging calcium Ions for Sodium Ions. So Calcium Carbonate which causes lime scale, becomes Sodium Carbonate, which doesn't scale. As it's a 1 for 1 exchange of a conduction Ionic solution, the TDS remains virtually unchanged.

Now that's not to say in-line softeners are great as I imagine they become exhausted pretty quickly, but are easily regenerated using a salt solution and then a rinse through with fresh water.

Posted December 12, 2012 link

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dsblv
Senior Member


Joined: 2 Dec 2006
Posts: 191
Location: Bellevue, WA
Expertise: I like coffee

Espresso: Rocket Giotto Evoluzione
Grinder: MACAP MC4
Posted Wed Dec 12, 2012, 8:31pm
Subject: Re: Rocket water filter
 

I don't believe the filter is rechargeable. You just replace the filter every 6 months.
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DavecUK
Senior Member


Joined: 21 Sep 2005
Posts: 1,461
Location: UK
Expertise: I love coffee

Posted Fri Dec 14, 2012, 5:22am
Subject: Re: Rocket water filter
 

ohills Said:

How would you know when to recharge?

Posted December 12, 2012 link

You would not have any easy way of knowing unless you tested the water with a proper water hardness test kit (ones that work with water softners). However if you recharge it once every 2 weeks your probably going to be OK, but it depends on the hardness of your incoming water.

As for the OP comment re you can't recharge it.....I assure you,  you can.
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NobbyR
Senior Member
NobbyR
Joined: 10 Jul 2011
Posts: 2,057
Location: Germany
Expertise: I love coffee

Espresso: Poccino Opus One, Ariete
Grinder: Eureka Mignon Istantaneo
Vac Pot: N/A
Drip: Melitta Linea Unica de Luxe
Roaster: N/A
Posted Fri Dec 14, 2012, 6:36am
Subject: Re: Rocket water filter
 

ohills Said:

How would you know when to recharge?

Posted December 12, 2012 link

I'd renew the filter cartridge every month in order to prevent bacterial and fungal growth.

 
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