This topic came up in another thread but I thought needed a wider
discussion.

The condensate water from a condensing boiler is slightly acidic. Mine
currently runs onto the ground pending a proper solution. I had
planned to feed it into the plastic soil stack but that stack connects
to an older cast iron pipe below ground level and that the drain below
ground has lime mortar joining the ceramic pipe sections.

Is it advised not to allow condensate water into such a drain system?
Will it really dissolve the cast iron and the lime mortar or are these
urban myths?

Robert

On Oct 6, 2:52*pm, John Rumm wrote:
RobertL wrote:
This topic came up in another thread but I thought needed a wider
discussion.

The condensate water from a condensing boiler is slightly acidic. Mine
currently runs onto the ground pending a proper solution. * I had
planned to feed it into the plastic soil stack but that stack connects
to an older cast iron pipe below ground level and that the drain below
ground has lime mortar joining the ceramic pipe sections.

Is it advised not to allow condensate water into such a drain system?
Will it really dissolve the cast iron and the lime mortar or are these
urban myths?

Assuming it was just condensate, it might eventually cause _some_
corrosion of a soil pipe, but only over a *very* long time span.

The advice not to discharge it straight into a metal pipe applies mainly
to the run from the boiler that will carry condensate and nothing else.
Once it is mixed with other waste water it becomes a non issue. When you
think about it, you stick a reasonable range of things down a drain that
will vary in ph - so the occasional splodge of vinegar strength acid
will be lost in the noise amongst the gallons of other crap (possibly
literally!)


A good point, thanks,

Robert

On 6 Oct, 14:52, John Rumm wrote:


so the occasional splodge of vinegar strength acid
will be lost in the noise amongst the gallons of other crap (possibly
literally!)

Just out of interest, does anyone know the pH of crap?

In article
,
1501 wrote:
so the occasional splodge of vinegar strength acid
will be lost in the noise amongst the gallons of other crap (possibly
literally!)

Just out of interest, does anyone know the pH of crap?

I'd guess your waste products would depend on the raw materials - same as
any other chemical process.

--
*Friends help you move. Real friends help you move bodies.

Dave Plowman London SW
To e-mail, change noise into sound.