The mechanical parts that complete a fixed suppression system beyond the cylinder, valve and nozzle: manifolds that combine multiple cylinders into one discharge path, actuator assemblies that convert the release signal into mechanical action, pressure switches that confirm discharge back to the panel, and the associated fittings.
Every one of these is matched to the system design. Pressure switches in particular are the panel's proof that discharge actually occurred, so a substitution changes what the system reports. Order from the system drawings.

Safe Signal
Safe Signal EPS10-2 Adjustable Alarm Pressure Switch, Two SPDT, 4-20 PSI
Sale price$67.90
Regular price$81.48
300+ units in stock
Viking
Viking 24682AB Sprinkler 155°F (K5.6)
Sale price$17.10
Regular price$20.52
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-844648-000 Corner Pulley, 1/2 EMT
Sale price$18.85
Regular price$22.62
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-802742-000 Vent, 2 Second
Sale price$129.70
Regular price$155.64
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 81-930117-000 Blow Off Fixture
Sale price$469.60
Regular price$563.52
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 81-897636-000 CO2 Discharge Delay, 60 Second, (UL, ULC & Marine Approvals Only)
Sale price$2,363.80
Regular price$2,836.56
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 81-874290-000 Pressure Operated Release
Sale price$331.10
Regular price$397.32
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 81-871071-000 CO2 Discharge Delay, 30 Second, (UL, ULC & Marine Approvals Only)
Sale price$2,263.25
Regular price$2,715.90
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 81-897600-001 CO2 Odorizer, 3/4" Stainless Steel Assembly (factory Filled with Oil of Wintergreen)
Sale price$1,674.45
Regular price$2,009.34
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-840253-002 5/8" I-Valve - TPED Approved
Sale price$1,443.75
Regular price$1,732.50
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-872450-000 Discharge Head, Plain Nut (for ADS and CO2)
Sale price$581.95
Regular price$698.34
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-840253-000 HPCO2 Type I 5/8" Valve
Sale price$1,117.15
Regular price$1,340.58
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-981372-000 HPCO2 Type I 1/2" Valve
Sale price$1,117.15
Regular price$1,340.58
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-890181-200 Electric Control Head, 24 VDC
Sale price$1,368.70
Regular price$1,642.44
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 90-160100-000 2 1/2" Valve Maintenance Kit (for Old Style ECS 90 100600 001 90 100601 001) Includes 1 Each of the Following: WK 264929
Sale price$238.00
Regular price$285.60
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-844579-000 Anti-Recoil Safety Cap, 1-1/2 ECS, FE13 Valve Outlet
Sale price$242.25
Regular price$290.70
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-283906-000 Valve Outlet Adapter, 2-1/2 (Availability Limited to Quantity on Hand)
Sale price$1,367.00
Regular price$1,640.40
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal WK-699205-030 Male Elbow, 5/16 Flare X 1/8 NPT
Sale price$87.35
Regular price$104.82
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 82-878737-000 Pressure Operated Control Head
Sale price$249.50
Regular price$299.40
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 85-100000-100 Control Head Monitor, Explosion Proof Assembly, Brass, Retrofit
Sale price$410.25
Regular price$492.30
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 81-803242-000 Safety Outlet, 3/4" NPT 2400-2800 psi (165-193 Bars)
Sale price$204.70
Regular price$245.64
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 81-890208-000 CO2 Stop Valve, 4 Flanged Brass (Order Flanges Separately)
Sale price$36,064.60
Regular price$43,277.52
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 81-994706-625 Valve Rebuild Kit for 5/8 in. Type I High-Pressure CO2 Cylinder Valve
Sale price$516.85
Regular price$620.22
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 81-681016-900 Flange-Weld, 4" CL900
Sale price$2,356.20
Regular price$2,827.44
Not in stock - available on backorder - lead time on request