The following isn't a complete reference library by any means but contains most of what I've found out about this nifty machine in the hope that it may be useful for other (new) Presso users too.
Please add or correct information!
The Presso is a basic and highly portable fully manual double-lever machine requiring only good ground coffee, boiling water, and a little muscle to produce espresso. Its natural partners are a conical-burr hand grinder and a kettle. Reviews vary but most find it good value. It can
produce very good espresso but not the most intense ristretto style, being hard to updose or grind finely for
. [See aecletec's comments below.] Promo footage often shows a weak fast flow of aqueous coffee but links below show the real thing too. The Presso design continues to evolve according to users' feedback -- the arms have already been strengthened, and a new plunger design is rumoured.Some vital stats
• 290 X 210 X 220mm (with portafilter in)
• weighs v. roughly 1.5kg
• aluminium, heatproof plastic, silicone rubber; filter basket stainless steel; pf heavy plastic, chromed steel
• usually costs around £75-£100 ($120-$160) new; comes with scoop/tamper, milk frothing widget, divider for pouring doubles into two cups (all plastic) and basic instruction leaflet
• double filter basket only
• basket diameter 51mm (barely) with internal convex ridge; 50mm tamper fits above the ridge, 49mm tamper goes down inside
• spares available, all moving parts easily replaceable
• bottomless portafilter available on request (in UK at least)
• typical pressure produced by an unmuscular female estimated at around 5 bars, YMMV
• reservoir holds roughly 180ml if overfilled to the maximum; 'official' markings take around 50ml for a single, another 30ml for a double
• produces real crema during a normal pour -- not the densest -- but proper, coloured cremaMy tips for use "as-is"
• grind slightly coarser than for other espresso machines
• easiest pre-heat procedure is, after filling and tamping the basket, to remove the pierced silicone rubber filter seal from underside of Presso, invert Presso over sink in one hand, pour boiling water in and slosh around interior, tip out over pf; then replace filter seal, upend Presso on counter, put basket in pf and pf into Presso, position glass and make shot immediately
• use immediately
boiled water to make shot
• overfill Presso to around 100-120ml (jiggle arms to let air out) for sustained pressure and crema; note that if you overfill too far, you can end up with less
leverage not more -- if the arms remain too high you can't get your fingers to the Presso 'legs' for added traction
• the pf only 'unwinds' during expression when coffee oils have built up in the bayonet ring -- to restore grip, clean both pf and bayonet ring using detergent and warm water
• the silicone filter seal collects coffee oils -- soak every few days in boiling water with detergent, or overnight in sodium bicarbonate solution; for ultra-persnickety cleaning, thread a large needle with quadrupled white cotton and push through the holes to strip out residue
• O-ring and cylinder also collect coffee oils -- disassemble arms, remove plunger and clean the parts every few days (takes 3-4 mins max)
• invest in extra filter baskets for lining up shots -- saves time and heat
• invest in spare O-rings, filter seals and plunger -- these are the most vulnerable parts if you really put the pressure on, but are also cheap to replace
• a drop of vinegar on a soft cloth removes hard water stains from shiny aluminium finish without damaging itOther tipsbasic official instructionshttp://presso.us/warranty hbuchtel (including advanced repair)http://www.unmodifiedpresso.blogspot.com/http://www.modifiedpresso.blogspot.com/pleasing visualshttp://www.youtube.com/watch?v=fntodFgah9Q
(concave tamper extraction; drippy, crema!)http://www.youtube.com/watch?v=kz9ZGvj6G08
(flat tamper extraction; drippy, crema!)More general infoFAQs etchttp://presso.com/blog/frequently-asked-questions/http://presso.com/blog/category/coffee-tips/https://www.facebook.com/pages/The-Presso-Club/links to spares
(NB one link from main page goes to "accessories" instead)
UK:http://www.presso.co.uk/spares.htmlReviews and discussionshome-barista.comExtremely sour shots (Presso + Porlex)
(2012, nice crema shots!)Newbie using a presso - need help with troubleshooting shots!
(general tips)PRESSO maker...HELP NEEDED....
(early tips from hbuchtel)
Jim Schulman and the Teflon plug; June 2005All-Clad Presso - the minimalist pour over espresso machineold reviews at Coffee Geek:http://coffeegeek.com/reviews/vacpots/pressomanual
(list of all the reviews)http://coffeegeek.com/forums/espresso/machines/150265coffeesnobs.com.auhttp://coffeesnobs.com.au/YaBB.pl?num=1169640941/0
(ongoing review, "Living with Presso" from 2007)http://coffeesnobs.com.au/YaBB.pl?num=1299733270
(tampers, general tips, cleaning routine)http://coffeesnobs.com.au/YaBB.pl?num=1160195415
(general enthusing and notes)http://coffeesnobs.com.au/YaBB.pl?num=1265356867
(2010 update on newly strengthened arms)miscellaneous
alt.coffee (more on the Teflon plug; September 2005)http://groups.google.com/group/alt.coff...8be98ee40f
gonzob (amazing, ends up practically plumbed in; Nov 2011)http://coffeesnobs.com.au/YaBB.pl?num=1321770018
Hope this may be useful.