I was envolved in a similar approach to pre-action in seperate buildings and
eventually abandoned the idea for many reasons(drainage,dry pipe underground,
& actuation lines).We ended up installing a riser & controls in each building.
I have installed dry pipe underground using schedule 40 black pipe with a
3-layer bituminous coating("Scotch-wrap" by 3M).Good luck.
Lamar Vaughn
Vaughn and Company
McDonough,Georgia
---- Lori Kitchen <[email protected]> wrote:
> We are working on the underground for a project where a remote building is
> to be protected by a pre-action system whose valve is in a different
> building 50ft away. The underground connecting these two buildings is to be
> part of the pre-action system (piping filled with air). In other words, the
> pre-action valve is in building A. The piping runs underground (after the
> valve) to building B.
>
> This is a new one for us. My questions are what type of pipe do you use for
> this purpose and how do we drain the water out of the underground?
>
> I appreciate any info!
>
>
>
>
>
> Lori Kitchen
>
> Whitewater Fire Sprinkler
>
>
>
> 316-295-4120 (office)
>
> 316-295-4162 (fax)
>
>
>
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