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Discussions > Espresso > Espresso Mods > Oscar (newb)...  
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epengr
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epengr
Joined: 1 Apr 2012
Posts: 46
Location: Saskatoon
Expertise: Just starting

Espresso: NS Oscar
Grinder: Baratza Vario
Posted Mon Apr 30, 2012, 5:35pm
Subject: Oscar (newb) idea: add hot water tap?
 

So I've just made a deal for a used Oscar but I won't have it for a week or so.  I've been reading all the treads I can find about it.

The one complaint / issue many seem to have with it is the lack of a hat water tap - mostly of concern if you're worried about regularly cycling the boiler water to prevent mineral build up and minimize scaling (because is may not be a very good source of water for americanos/tea anyways).

One thing I've never seen is anyone suggesting that one could be added.  There is a drain plug/valve as I understand it, is there some reason that you couldn't plumb that out (or tee into it) to add something like this:

Click Here (www.cw-usa.com)   (maybe?)

...to the case for external access?  

The boiler pressure would be adequate to feed hot water from any port below the water line (or too much? might need to add a restrictor?), wouldn't it?

There may be an obvious reason that this it not feasible. If so, let the flames fly ;).


Since I have an Oscar but don't HAVE it yet, all I can do is read and dream right now...
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Coffeenoobie
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Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,052
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Mon Apr 30, 2012, 7:47pm
Subject: Re: Oscar (newb) idea: add hot water tap?
 

the steam wand boils water really fast. I don't miss it much.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

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Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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frcn
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frcn
Joined: 23 Dec 2001
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Espresso: Vibiemme Domobar Double
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Posted Mon Apr 30, 2012, 8:04pm
Subject: Re: Oscar (newb) idea: add hot water tap?
 

The idea of being able to drain the boiler on a regular basis is that if it is refilled with a low-mineral source of water (like softened water) it will leach minerals off the inside of the boiler and on the heating element. Sort of a reverse scaling. Having a hot water tap makes that a lot easier... or at least quicker and harder to forget.

 
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 8,038
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Wed May 9, 2012, 10:27am
Subject: Re: Oscar (newb) idea: add hot water tap?
 

The counter point is though, once the minerals have come out of the water, there are no more to cause scale. Only by adding make up water are more minerals introduced. So, you will actually go LONGER between descaling procedures by not having and using a hot water tap as only make up water for steam is introduced if you do not use a hot water tap.

Hey, it is just something I read someplace and it seems to be logical. YMMV. I am NO expert ;-P

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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epengr
Senior Member
epengr
Joined: 1 Apr 2012
Posts: 46
Location: Saskatoon
Expertise: Just starting

Espresso: NS Oscar
Grinder: Baratza Vario
Posted Wed May 9, 2012, 5:00pm
Subject: Re: Oscar (newb) idea: add hot water tap?
 

calblacksmith Said:

The counter point is though, once the minerals have come out of the water, there are no more to cause scale. Only by adding make up water are more minerals introduced. So, you will actually go LONGER between descaling procedures by not having and using a hot water tap as only make up water for steam is introduced if you do not use a hot water tap.

Posted May 9, 2012 link

You have to consdier that steam is pure distilled water, so if you take steam out and put anything but distilled water in then you're concentrating minerals in your boiler.  

Now, whether the mineral scale depsoition rate is high enough to deplete the minerals in the boiler water...  Maybe, if you don't steam very often.   You'd actually be surprised how much water you can go through just steaming a small cap or two a day (not counting any brew water).
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Coffeenoobie
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Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,052
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Thu May 10, 2012, 9:14am
Subject: Re: Oscar (newb) idea: add hot water tap?
 

My understanding no brew water comes from the boiler on Oscar.  The brew water passes through but doesn't mix with the steam water in the boiler.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 8,038
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon May 14, 2012, 6:31am
Subject: Re: Oscar (newb) idea: add hot water tap?
 

epengr Said:

You have to consdier that steam is pure distilled water, so if you take steam out and put anything but distilled water in then you're concentrating minerals in your boiler.  

Now, whether the mineral scale depsoition rate is high enough to deplete the minerals in the boiler water...  Maybe, if you don't steam very often.   You'd actually be surprised how much water you can go through just steaming a small cap or two a day (not counting any brew water).

Posted May 9, 2012 link

The amount of steam make up water is no where near what you would use with a hot water tap. The minerals hit a balance too, and once they hit the "sweet spot" you will not get any more scaling from the water. This is the reason salt based water "softeners" work.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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