I agree with you, but the manual wet is full of water and leakage could be
detected same as a dry automatic, but you have to test the wet manual. I would
think the air and water mixture of a dry automatic would lead to corrosion
problems faster than a manual wet. Especially since dry pipe valves need to be
tripped every year and you are introducing water at that point. Evan a partial
trip will leave some condensation in addition to whatever moisture you get from
the air compressor. At this time we don't hydrotest dry automatic standpipes,
but the question came up as to why. Thanks.
Jay Stough
NICET IV LAYOUT
NICET III ITM
On Thursday, October 28, 2021, 02:25:14 PM EDT, Mike Morey
<[email protected]> wrote:
The hydro is to find out if the thing is full of holes IIRC. Automatic dry
has air pressure to monitor that, the others don't. Presumably this will be
updated when all standpipes have to be air supervised for leakage (in the next
edition, as of now, of 14)
Mike Morey
CFPS 3229 • NICET S.E.T. 123677
Project Manager • Fire Protection Group
Shambaugh & Son, LP an EMCOR Company
7614 Opportunity Drive • Fort Wayne, IN • 46825
direct 260.487.7824 / cell 260.417.0625 / fax 260.487.7991
email [email protected]
-----Original Message-----
From: Sprinklerforum <[email protected]> On Behalf
Of jaycs7919--- via Sprinklerforum
Sent: Thursday, October 28, 2021 2:19 PM
To: Sprinkler Forum <[email protected]>
Cc: [email protected]
Subject: Hydrostatic testing of Automatic Dry Standpipes
BE ADVISED - This email originated outside EMCOR.
Do you have to do a hydrostatic test of an automatic dry standpipe based on the
2017 or 2020 edition of 25?
https://urldefense.com/v3/__http://6.3.2.1__;!!FaxH778!JXv4ug48P204AzhXwW0J9xcK7hgbtEeaK5RFdEz1iPXJcmBcCujziJZbsNmvcaLL$
calls out the hydrostatic test of manual stadpipes and semiautomatic dry
standpipes; no mention of automatic dry standpipes. Under the definitions, the
difference is that the semiautomatic uses a deluge valve with pull stations or
some control device to activate the system. The automatic uses a dry valve and
opening the valve operates the system. It doesn't make sense that you would
test one type but not the other. What am I missing?
Jay Stough
NICET IV LAYOUT
NICET III ITM
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