"snip
: Is this something that will clean out OK if I just give it time in the
: vinegar (or citric acid)? Will I ruin it if I take it apart? Will I
: ruin it if I use something stronger, like hydrochloric acid (diluted
: 50%)? I also have phosphoric acid, which is safer for stainless steel,
: but I dunno if it will remove calcium scale.
:
: Worst case is I have to buy a new valve for $20 plus shipping.
: Wha'd'ya think?
:
: Thanks,
: Bob

Each of the different Espresso Brand makers sells "Descaling Liquid". They all
stress NOT to use acids.

This is for, of course, after you have got it clean from the blockage as it has to
circulate.

You should be able to go on line to Gaggia to find a manual for your machine and
it will describe the routine descaling operation.

The modern electronic ones signal that you have to do a descale after 'x' number
of cups.

If you use only deionised water to fill the machine you will not need to descale
in the future.

Frenchy