RJJ
Co-Founder
Would you approve this?
-
Welcome to The Building Code Forum
Your premier resource for building code knowledge.
This forum remains free to the public thanks to the generous support of our Sawhorse Members and Corporate Sponsors. Their contributions help keep this community thriving and accessible.
Want enhanced access to expert discussions and exclusive features? Learn more about the benefits here.
Ready to upgrade? Log in and upgrade now.
Sprinkler alteration
- Thread starter RJJ
- Start date
Coug Dad
Platinum Member
Re: Sprinkler alteration
I looked at a building recently where over 50 sprinklers had been relocated using various lengths of 1/2 inch nipples to start the transition. Sometimes they increased the pipe back to 1 inch. Other times they just ran the 1/2 inch to where the sprinkler head was relocated.
Rejected! :evil:
I looked at a building recently where over 50 sprinklers had been relocated using various lengths of 1/2 inch nipples to start the transition. Sometimes they increased the pipe back to 1 inch. Other times they just ran the 1/2 inch to where the sprinkler head was relocated.
Rejected! :evil:
FM William Burns
REGISTERED
Re: Sprinkler alteration
Yea.....I just don't think 13 or ASTM envisioned that
Yea.....I just don't think 13 or ASTM envisioned that
RJJ
Co-Founder
Re: Sprinkler alteration
I guess they think I just show up for the coffee! :mrgreen:
I guess they think I just show up for the coffee! :mrgreen:
JBI
REGISTERED
Re: Sprinkler alteration
Looks like someone could use an FPE to help them understand why that's a bad idea... (not you RJ, the genius who did the install
)
Looks like someone could use an FPE to help them understand why that's a bad idea... (not you RJ, the genius who did the install
)
FM William Burns
REGISTERED
Re: Sprinkler alteration
Coffee......I guess that are much nicer in PA
Coffee......I guess that are much nicer in PA
Coug Dad
Platinum Member
Re: Sprinkler alteration
I stand corrected. The condition show is allowed under some conditions if the length of the 1/2 inch nipple is less than 4 inches.
My bad!
I stand corrected. The condition show is allowed under some conditions if the length of the 1/2 inch nipple is less than 4 inches.
My bad!
Coug Dad
Platinum Member
Re: Sprinkler alteration
NFPA 13 (2002) Section 8.14.19.3, Revamping of Sprinker Systems. I knew the minute I posted my original thoughts that I remember doing just that conditon in the past. This allowance is for revamping only. I would not allow a sprinkler contractor install sprinklers in 1/2 inch openings for a core and shell and then use this provision for tenant finish. The core and shell should use bushings and then the bushings removed when the TI's are done.
NFPA 13 (2002) Section 8.14.19.3, Revamping of Sprinker Systems. I knew the minute I posted my original thoughts that I remember doing just that conditon in the past. This allowance is for revamping only. I would not allow a sprinkler contractor install sprinklers in 1/2 inch openings for a core and shell and then use this provision for tenant finish. The core and shell should use bushings and then the bushings removed when the TI's are done.
FM William Burns
REGISTERED
Re: Sprinkler alteration
Thanks, accidently clicked the X when trying to edit...ooops. I didn't look in the 02 so thanks for the info.
EDIT: Now if it's a pipe schedule? New calced system then no.
Thanks, accidently clicked the X when trying to edit...ooops. I didn't look in the 02 so thanks for the info.
EDIT: Now if it's a pipe schedule? New calced system then no.
Re: Sprinkler alteration
so what part of the posted picture complies??
8.14.19.3 Revamping of Pipe Schedule Systems.
8.14.19.3.1 When pipe schedule systems are revamped, a nipple not exceeding 4 in. (102 mm) in length shall be permitted to be installed in the branch line fitting.
8.14.19.3.2 All piping other than the nipple permitted in 8.14.19.3.1 and 8.14.19.3.3 shall be a minimum of 1 in. (25.4 mm) in diameter in accordance with Figure 8.14.19.3.2.
8.14.19.3.3 When it is necessary to pipe two new ceiling sprinklers from an existing outlet in an overhead system, the use of a nipple not exceeding 4 in. (102 mm) in length and of the same pipe thread size as the existing outlet shall be permitted, provided that a hydraulic calculation verifies that the design flow rate will be achieved in accordance with Figure 8.14.19.3.3.
so what part of the posted picture complies??
8.14.19.3 Revamping of Pipe Schedule Systems.
8.14.19.3.1 When pipe schedule systems are revamped, a nipple not exceeding 4 in. (102 mm) in length shall be permitted to be installed in the branch line fitting.
8.14.19.3.2 All piping other than the nipple permitted in 8.14.19.3.1 and 8.14.19.3.3 shall be a minimum of 1 in. (25.4 mm) in diameter in accordance with Figure 8.14.19.3.2.
8.14.19.3.3 When it is necessary to pipe two new ceiling sprinklers from an existing outlet in an overhead system, the use of a nipple not exceeding 4 in. (102 mm) in length and of the same pipe thread size as the existing outlet shall be permitted, provided that a hydraulic calculation verifies that the design flow rate will be achieved in accordance with Figure 8.14.19.3.3.
Coug Dad
Platinum Member
Re: Sprinkler alteration
The 1/2 inch by no more than 4 inch nipple
The 1/2 inch by no more than 4 inch nipple
RJJ
Co-Founder
Re: Sprinkler alteration
Yes I agree in part! The nipple would comply! However, I only have one photo and quite a few heads done in this manner. No plan or calculations.
I believe the nipple is permitted if it extends vertical / up 4" then make the off set.
Yes I agree in part! The nipple would comply! However, I only have one photo and quite a few heads done in this manner. No plan or calculations.
I believe the nipple is permitted if it extends vertical / up 4" then make the off set.
Coug Dad
Platinum Member
Re: Sprinkler alteration
The "up" part would be if you are adding return bends. The 1/2 x 4 drop is allowed to revamp the system. Normally, you would want to back out the piping to the 1" outlet. However, given that this pipe is concealed, the revamp provisions would apply. It does not matter if the 1/2 x 4 option is used once, or for many heads. The revamp provisions do require hydraulic calculations if the system is calculated.
The "up" part would be if you are adding return bends. The 1/2 x 4 drop is allowed to revamp the system. Normally, you would want to back out the piping to the 1" outlet. However, given that this pipe is concealed, the revamp provisions would apply. It does not matter if the 1/2 x 4 option is used once, or for many heads. The revamp provisions do require hydraulic calculations if the system is calculated.