To support Steve's remarks, I submit the following picture, from FPC magazine a few years ago.

food for thought?
*Ken Wagoner, SET
*Parsley Consulting***
*350 West 9th Avenue, Suite 206
*Escondido, California 92025
*****Phone 760-745-6181*
Visit our website <> ***
On 10/12/2016 8:05 AM, Steve Leyton wrote:

Okay … warning to all y’all: I’ve only had one coffee and not entirely lucid yet so the following analogy may seem far-fetched. You know how when we were young and thought our parents thought and said crazy stuff? But as we get older we starting thinking and saying the EXACT SAME STUFF? Well, let’s think of industry as the kids and our AHJ’s as the parents – I find myself thinking like an AHJ all the time now. So a two way FDC is overkill? Hydraulically it may well be but are we quite sure that the property management company or HOA is going to diligently inspect and maintain the FDC inlet? Bugs, birds, plants, little kids stuffing things into it and what-not?? No, we’re not sure which is one of the principal reasons why having multiple inlets on ANY connection is a good idea, in case one is damaged or encumbered.

The wet-pipe committees undertook an FDC task group between cycles to determine how much water can actually be pumped into multiple 2½” inlets. Coming out of that, we’re working mod’s to the prescription for how many inlets should be installed based on demand. Stay tuned for more and try to see the bigger picture.

Steve L.

*From:*Sprinklerforum [] *On Behalf Of *Brian Harris
*Sent:* Wednesday, October 12, 2016 7:11 AM
*Subject:* RE: FDC on 13R

Overkill is exactly what I was thinking too. AHJ won’t budge so Siamese it is……

*Brian Harris, CET*

BVS Systems Inc. <>

*From:*Sprinklerforum [] *On Behalf Of *Todd Williams
*Sent:* Wednesday, October 12, 2016 10:09 AM
*To:* <>
*Subject:* RE: FDC on 13R

I have had to do this on some 13R group homes. The AHJ wouldn't accept a single 2-1/2. Seems like overkill. Two 2-1/2" connections fed from a 1500 gpm pump for a 55 gpm demand. We ran 4" to the riser room and connected with a 4 x 1-1/4 welded outlet.

via Newton Mail <>

On Wed, Oct 12, 2016 at 9:13 AM, Brian Harris < <>> wrote:

    Double (Siamese)

    *Brian Harris, CET*

    BVS Systems Inc. <>

    [] *On Behalf
    Of *Todd Williams
    *Sent:* Wednesday, October 12, 2016 9:11 AM
    *Subject:* Re: FDC on 13R

    Single or double?

    via Newton Mail

    On Wed, Oct 12, 2016 at 8:07 AM, Brian Harris
    < <>> wrote:

        Looking for opinions. AHJ wants to swap out a single 1-1/2”
        FDC on a 13R system and replace it with a standard 2-way
        (2-1/2”) FDC. Thoughts, concerns, suggestions, etc…..

        *Brian Harris, CET*

        BVS Systems Inc.

        Design Manager <>

        Phone: 704.896.9989

        Fax: 704.896.1935

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