Hi, yes they do make polyethylene pipe; the common flexible black plastic pipe, not to be confused with also common rigid DWV (drain waste vent) pipe, I don't know what that's made of. The poly pipe comes in two grades; utility and "drinking water", in sizes from 1/2 to 2 inches. Hope this helps, Malcolm
On Sat, 2007-11-17 at 20:57 -0600, Clayton Family wrote: > I would suggest trying to find some other pipe than PVC- that stuff is > not good for you, and can cause cancer. Polyethylene is pretty inert as > far as plastic goes, but am not sure they make pipes out of it. > > Activated alumina is used as a mechanical filter much the same way as > charcoal, and maybe zeolites. See Wikipedia: > > "Activated alumina is manufactured from aluminium hydroxide by > dehydroxylating it in a way that produces a highly porous material; > this material can have a surface area significantly over 200 square > metres/g. The compound is used as a desiccant (to keep things dry by > absorbing water from the air) and as a filter of fluoride, arsenic and > selenium in drinking water. It is made of aluminium oxide (alumina; > Al2O3), the same chemical substance as sapphire and rubies (but without > the impurities that give those gems their color). It has a very high > surface-area-to-weight ratio. That means it has a lot of very small > pores, almost like tunnels, that run throughout it." > > Alum is a different animal. > > I used to hail from So Cal- my town was floridated years ago. > > Kathryn > > On Nov 17, 2007, at 7:21 PM, <gvagraph...@adelphia.net> wrote: > > > Ode, > > > > What filtering medium can you suggest for filtering fluoride. I'm in > > sourthern CA and they are starting to fluoridate our water supply. My > > concern is bathing and showering -- drinking water is an easier matter > > to deal with. > > > > Some time ago someone suggested Diatomacious earth as a likely filter > > medium (not for filtering fluoride). > > > > The net suggests Activated Alumina -- not to sure about using Alumina > > to filter water for showering -- then again something call Alum is > > used in the water treatment area and has been for many years -- is > > there a connection? > > > > There are small filters available for shower heads -- I can't see them > > doing much for long. Our water has a TDS reading of 400 not exactly > > for making CS. Not sure what the PWT reading is! > > > > I'd like to cobble together a pre-filter array of say 4 x 48 inch (4" > > black PVC pipes) filled with a fine granular filtering medium -- a > > final finer filter into the hot and cold water pipes -- a commercial > > system will cost 5-600 bucks (a maybe 24 inch metal cylinder and you > > don't know what they are using as filter medium!!! Obviously I'd be > > perpared to maintain the unit closely and renew the medium -- being > > well armed with a TDS and PWT meter! > > > > Of course I have to wonder if my array of 4 x 48 inch pipes will take > > the pressure of an incoming town water system -- that I can research > > myself! I use Albertsons distilled water for my Bob Berger > > constructed CS-EIS Maker. > > > > Any suggestions Listers -- Thanks > > > > Douglas Haack > > > -- > The Silver List is a moderated forum for discussing Colloidal Silver. > > Instructions for unsubscribing are posted at: http://silverlist.org > > To post, address your message to: silver-list@eskimo.com > > Address Off-Topic messages to: silver-off-topic-l...@eskimo.com > > The Silver List and Off Topic List archives are currently down... > > List maintainer: Mike Devour <mdev...@eskimo.com> > >
