On 25/05/17 22:45, michael adams wrote:
"jim" k wrote in message o.uk...
"michael adams" Wrote in message:

"jim" k wrote in message o.uk...

Right so just to be clear. Having blocked the S bend
with a balloon or similar in all 5 cases, the amount of brick
acid solution necessary to clean all 5 bowls, which will necessarily
have to be filled to near the brim to dissolve the limescale on
the backs of the bowls, will do no harm if released into
the septic tank.

Even if that is the issue, (rather than just your imagination of
it) anyone with a better imagination could think of far easier
ways than you apparently can.

I never said use hydrochloric acid did you?

You twice referred to acid which would dissolve limescale
if left overnight. The usual recommendation for this is
dilute hydrochloric acid which is usually referred to as brick
acid, if for no other reason than, it's easier to spell.

Your first reference

"Anyhoo given that a decent septic tank worth having probably has a
capacity of 2-2.5k litres+, all this fretting over a couple of
occasional litres of dilute acid"

"Your second reference in response to my statement that in adverts
for household limescale removers "It only dissolves it in the adverts."

I haven't seen adverts for acid - have you seen any?


Once again. (this time from your own attempt at proof) it is clear
*I* never suggested brick acid or hydrochloric acid. Who
did?

So what acid were you actually referring, to which is capable
of dissolving limescale overnight ?

well any of sulphuric (battery acid) hydrochloric (brick acid)
phosphoric (coca cola) acetic (vinegar) formic (often used in de
scalers) sulphamic, muriatic etc will do.

In fact I cant think of an acid that wont. LSD perhaps wont.
It will just make the lime scale more interesting.




If you remember it was you who insisted that this acid of your
choice actually dissolved the limescale, rather than softened
it, so that no scraping or other manual intervention was
necessary.

This is of course correct as anyone who has tipped brick acid on
limestone will tell you.

2HCl + CaCO3- H2O + CaCl2 + CO2.

CaCl2, calcium chloride, is soluble in water and the reaction produces
water.

So that diffuses away.

The problem is rate of diffusion: at the acid-limescale interface the
acid concentration falls especially with low acid concentrations where
the fizz factor doesn't stir things up too good




That's assuming that you or the other members of your household
do actually need to use this particular lavatory bowl at least
once a day, of course.

Ah, the mandatory ad hominem.



michael adams

...





--
"When a true genius appears in the world, you may know him by this sign,
that the dunces are all in confederacy against him."

Jonathan Swift.