Plumbing question

[JayUtah]

Somewhere, on a plumbing forum, someone is asking about unsymmetrical dimethylhydrazine.... 

Which actually does pose a not-insignificant problem for its plumbing.

[Peter B]

Somewhere, on a plumbing forum, someone is asking about unsymmetrical dimethylhydrazine.... 

But isn't there a vague Apollo connection?

I have this memory of a problem with hydraulic fluid in either the Saturn vehicle or the Apollo spacecraft which kept producing crystals that had the potential to block up the plumbing? 

Or do I have it wrong?

[VQ]

Here's the stuff. The view shows the top of the cap that is inside the tap.

BTW, it is lovely to see the stream of water from a freshly descale thingy.

Looks like a mix that includes copper carbonate and maybe Fe3O4, to the extent that it's possible to tell these things from a photo.

[gwiz]

Certainly the water here in the south of England is rock hard.

Not everywhere.  Ours comes from rain on granite moorland and not much of that gets dissolved.

[molesworth]

Looks like a mix that includes copper carbonate and maybe Fe3O4, to the extent that it's possible to tell these things from a photo.

Have you tried the Firefox Spectroscope plugin? 

[Glom]

It reminded me of miniature blue slate I've used in garden. Thought it looked quite nice.

[VQ]

Looks like a mix that includes copper carbonate and maybe Fe3O4, to the extent that it's possible to tell these things from a photo.

Have you tried the Firefox Spectroscope plugin? 

I get distinct peaks at around 490, 580, and 640 nm. 

[LunarOrbit]

Here's the stuff. The view shows the top of the cap that is inside the tap.

BTW, it is lovely to see the stream of water from a freshly descale thingy.

It's not lead, I hope.