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.

Kidde Fenwal
Kidde Fenwal 1-B6793-740 Manifold Burst Disc / Safety Outlet
Sale price$169.10
Regular price$202.92
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 1-B4112-103 Manifold Pressure Gauge 250 Bar - 1/2" NPT
Sale price$345.45
Regular price$414.54
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 1-981332 Discharge Pressure Switch, 3-Pole, Single Throw, Flameproof NON EU Only
Sale price$2,213.40
Regular price$2,656.08
Not in stock - available on backorder - lead time on request
Kidde Fenwal
Kidde Fenwal 1-06-118262-001 Supervisory Pressure Switch
Sale price$337.35
Regular price$404.82
Not in stock - available on backorder - lead time on request
Vesda
Vesda by Xtralis VSP-009 Scanner Chassis Assembly, Includes Scanning Manifold
Sale price$9,498.70
Regular price$11,398.44
Not in stock - available on backorder - lead time on request
Amerex
Amerex Fire 9905
Sale price$427.30
Regular price$512.76
Not in stock - available on backorder - lead time on request
Vesda
Vesda VSP-956-04 VESDA-E Flow Sensor Manifold GA4
Sale price$563.55
Regular price$676.26
In Stock