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Wrong size gasket?
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Markarian
Senior Member
Markarian
Joined: 27 Jun 2012
Posts: 658
Location: Seattle Area
Expertise: I love coffee

Espresso: ECM Technika IV Profi WT-WC
Grinder: Baratza Forte AP, HG One
Vac Pot: Bunn Trifecta MB
Drip: Moka, Aeropress, Hario V60
Roaster: Behmor 1600
Posted Thu Dec 19, 2013, 6:40pm
Subject: Wrong size gasket?
 

So I started seeing telltale signs the group gasket on my Technika wasn't forming a good seal anymore. Sure enough I took out the gasket and it was hard as a rock. I had ordered spares and went ahead and put one in, along with a new precision shower screen. Now my PF needs to be cranked all the way to the 4:00 position to seal! I was told that my machine uses a 8mm gasket but now I'm wondering if I should have ordered 8.5 or 9mm. Any advice? Thanks everyone.
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 477
Location: Canada
Expertise: Professional

Espresso: Giga 5, ECM Giotto, Rocket...
Grinder: Anfim Milano-Best
Vac Pot: No  :(
Drip: Some $30 thing from Walmart
Roaster: I buy pre-roasted.
Posted Thu Dec 19, 2013, 7:03pm
Subject: Re: Wrong size gasket?
 

Did the one that came out have a .5 mm paper shim above it?   If so, is it still good enough to reuse, or destroyed in cleaning?
The shims are only a dollar at even the most insanely overpriced retailers. (Teflon shims come in 1mm and 1.5  and will be more than a buck).
If your current 8mm Gasket fits best with a .5mm shim, make your next gasket an 8.5mm.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,864
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 Thu Dec 19, 2013, 9:15pm
Subject: Re: Wrong size gasket?
 

In a pinch, you could make your own shims out of some heavy stock. I have to convert to inches for my brain to work, 1 mm is about 34  thou so half a mm is about 17 thou so that should not be too hard to find that is about 4 sheets of writing paper thick as an average sheet of paper is 5 thou give or take a little.
You might even find some thin hard plastic to cut at that thickness and like SStones said, adjust the purchase of the next gasket accordingly.

 
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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