FDC
Note How do you want Clappers: reversible for Top outlet to riser?
A four-way brass body wall mount polished chrome
5426T-Auto-Spkr = $3,000.00

Ductile iron 4-way version is
5436-T = $2,800.00
add $120 for polished chrome plate
Lead time = 7-10 days.
MAKE SURE you have a room large enough to accommodate the manifold. see FDC pics


Potter Roemer
regular siamese 5710-A   4 x 2-1/2 Ductile iron
  with red paint = $70.00 2-way version

siamese: 5710-A-DI  4 x 2-1/2 Ductile iron
  with polished-chrome $450-00 no snoot. brass swivel
  (because it has to be dressed twice in the surfacing process)

NB BackPlate A-D  5962-68 xtra $100 brass w/polished chrome. cannot get Ductile Iron

FDC - 5710-A Brass $106.00
Chrome plated $154.00 ETA
//------------------------------------------------------------------------------------------------
OS&Y 6"		$1,500.00 ea
Tamper 		   $150.00 ea
Check v/v =	   $350.00 ea

OS&Y  4"  $300.00
Tamper	$150.00

Also
Look at the color code jpg file here.

\Also
200 degree heads in walk-in coolers, and around kitchen hoods.

and ...
2016-10-17
https://www.archtoolbox.com/materials-systems/fire-supression/sprinklerspacing.html

Occupancy Hazard		Square Foot per Head			Maximum Spacing Between Sprinklers
Light Hazard		
(Office, Educational, Religious,
Institutional, Hospitals,
Restaurants, Clubs, 
Theaters, etc.)			130-200 SF per head
				(based on obstructions and flow calcs) 			15 ft 

Ordinary Hazard
(Mills, Manufacturing, 
Processing, Machine Shops, 
Repair Garages, Post Offices, 
Bakeries, Wood Machining and 
Assembly, Auto Parking, etc.) 	130 SF per head 					15 ft 

Extra Hazard
(Plastic Processing, Chemical
 Spraying, Metal Extruding, 
Printing, Varnishing, Painting,
 etc.) 				90-130 SF per head
				(based on obstructions and flow calcs) 			12 ft 

Maximum Distance from Wall: half (1/2) of the maximum distance between sprinkler heads.
Minimum Distance Between Sprinklers: typically 6'-0".
Distance from Ceiling: minimum 1", maximum 12" for unobstructed construction. 
	The minimum 1" is typical; however, concealed, recessed, and flush sprinklers may be mounted
		 less than 1" from the ceiling and shall be installed based on their listing.