[Sprinklerforum] Re: Dry System Drain Manifolds

[Russell Gregory]

Note the tie-in drains are restricted to 25nb to stop the Dry Pipe tree system 
becoming a grid system.

 

Russell Gregory

 

e-mail rcgreg...@snap.net.nz  

 

 

 

From: Jamie Seidl 
Sent: Thursday, February 1, 2024 3:32 PM
To: Discussion list on issues relating to automatic fire sprinklers 

Subject: [Sprinklerforum] Re: Dry System Drain Manifolds

 

You can tie-in multiple low point drains on dry systems together. it's actually 
a "shall" for multiple branchlines.

NFPA 13 2013 & 2016

8.16.2.5.3.6 Tie-in drains shall be provided for multiple adjacent trapped 
branch pipes and shall be only 1 in. (25 mm).Tie-in drain lines shall be 
pitched a minimum of 1⁄2 in. per 10 ft(4 mm/m).

This section was moved to 16.10.5.3.6 in 2019.

 

I don't see any reason you couldn't provide tie-in drains post drum drip either.

 

Jamie Seidl

 

On Wed, Jan 31, 2024 at 4:53 PM Taylor Schumacher mailto:tay...@sfsprinkler.com> > wrote:

I remember seeing something that says you cannot combine dry system drains 
together, but I cannot find it. FWIW, this would be post drum drips.

 

Thanks,

 

 

Taylor Schumacher

 


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[Sprinklerforum] Re: Dry System Drain Manifolds

[Jamie Seidl]

You can tie-in multiple low point drains on dry systems together.
it's actually a "shall" for multiple branchlines.
NFPA 13 2013 & 2016
8.16.2.5.3.6 Tie-in drains shall be provided for multiple adjacent trapped
branch pipes and shall be only 1 in. (25 mm).Tie-in drain lines shall be
pitched a minimum of 1⁄2 in. per 10 ft(4 mm/m).
This section was moved to 16.10.5.3.6 in 2019.

I don't see any reason you couldn't provide tie-in drains post drum drip
either.

Jamie Seidl

On Wed, Jan 31, 2024 at 4:53 PM Taylor Schumacher 
wrote:

> I remember seeing something that says you cannot combine dry system drains
> together, but I cannot find it. FWIW, this would be post drum drips.
>
>
>
> Thanks,
>
>
>
>
>
> *Taylor Schumacher*
>
>
>
> _
> SprinklerForum mailing list:
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> sprinklerforum-le...@lists.firesprinkler.org
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[Sprinklerforum] Dry System Drain Manifolds

[Taylor Schumacher]

I remember seeing something that says you cannot combine dry system drains 
together, but I cannot find it. FWIW, this would be post drum drips.

Thanks,


Taylor Schumacher


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