Kidde Wet Chemical Suppression System

Code: WHDR
  • Fire suppression for Commercial cooking
  • Automatic & manual actuation
  • Not toxic

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The Kidde Wet Chemical System provides fire protection for commercial kitchen applications such as appliances and ventilation.

The system uses a liquid chemical called Aqueous Potassium Carbonate (APC) as its agent. APC, a solution of potassium carbonate in water, suppresses fires through a process of:

  • Saponification of surface grease (turning it into combustion-resistant foam/soap).
  • Cooling effects of water vaporisation,
  • Inerting effects of resultant steam formation, and
  • Interruption of the chemical chain reaction of combustion.

Hazards and equipment that can be protected using wet chemical extinguishing systems are

  • Restaurant, commercial, and institutional hoods
  • Plenums, ducts, and filters with their associated cooking appliances
  • Special grease removal devices

The wet chemicals used in the Kidde WHDR Wet Chemical System are stable at both low and high temperatures. The upper storage temperature limit for the system is 120°F (49°C). The lower temperature limit is 0°F (-18°C).

APC wet chemical agent is applied in a concentrated liquid spray to a burning surface, reacting quickly with the hot grease or oil to produce a foam blanketing the surface. The layer acts to smother a fire and with the cooling effect of the APC wet chemical agent, also reduces the possibility of fire reflash.

Hazardous material information,  HMIS rating for APC wet chemical is as follows:

  • Health (H) = 2
  • Flammability (F) = 0
  • Reactivity (R) = 0

Upon system alarm notification, all personnel must evacuate the protected space. Failure to do so may result in temporary respiratory difficulties, disorientation, or personal injury.

Wet chemical fire extinguishing agent is considered nontoxic, but is classified as a skin/eye irritant, and may cause temporary irritation to the eyes, skin, or respiratory system. Avoid unnecessary exposure.

No unusual cleanup procedure is required. After the appliances have completely cooled, the residue from the discharge may be cleaned up with a wet cloth or sponge. Wear rubber gloves while cleaning. If skin or eyes come in contact with the agent, flush thoroughly with water.

APC wet agent is electrically conductive. To avoid electric shock, de-energise all electric circuits to appliances, outlets, and wiring by disconnecting or turning off the electric power at the main fuse or circuit breaker box. Do not clean up APC wet agent or touch electric appliances, outlets, power cords, or other wiring with electrical power on.

The Wet Chemical system holds UL and ULC listings as a pre-engineered system.

The classification of fire is defined as the following:

  • Class A: Surface Type Fires; wood or other cellulose-type material (ordinary combustibles)
  • Class B: Flammable liquids
  • Class C: Energised electrical equipment
  • Class D: Combustible metals (such as magnesium, sodium, zirconium, potassium, and titanium)
  • Class K: Combustible cooking media (vegetable or animal oils and fats)

Note: Kidde Wet Chemical system is suited for Class K type of fire.

The system utilises stored pressure agent gas cylinders, powder-coated, welded mild-steel shell conforming to DOT/TC specification 4BW/4BA construction and NFPA standards. The valve is forged brass with nickel plating. The plating and cylinder coating makes it corrosion resistant.

The system can be activated mechanically from manual release, thermo-bulb links, and fusible links. The system can be activated electrically with a 24 Vdc compatible alarm control panel that is tested and listed with the Kidde XV Control System. Both automatic detection and manual release devices are used on control panels.

Other actuations are available, such as mechanical gas valve closure or dry contacts for annunciation and electrical shutdowns.

Upon actuation, the wet chemical is discharged through agent distribution piping and specially designed nozzles positioned throughout the protected area.


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Title Size
Kidde WHDR k-87-001 243 KB
K-87-027 XV Control System 156 KB

Additional information

Weight0.09 kg

Ordering Information

1-87-125002-00110L  (2.5 gal) c/w burst disc TPED
1-87-125006-00115L  (4.0 gal) c/w burst disc TPED
1-87-125005-00123L  (6.0 gal) c/w burst disc TPED
1-87-120001-001WHDR 125 cylinder and valve assy
1-87-120002-001WHDR 260 cylinder and valve assy
1-87-120006-001WHDR 400M cylinder and valve assy
1-87-120005-001WHDR 600 cylinder and valve assy
1-60-9197430-000WHDR 125 mounting bracket
1-60-9197263-000WHDR 260/10 mounting bracket
1-60-9197414-000WHDR 400/15 mounting bracket
1-87-100013-001WHDR  600/23 mounting bracket
1-844908Discharge adaptor kit
Design (Inc 1 x Flow calc and Drawings per protected space)
1-87-120099-402XV Control System
Includes the following:
1-87-120042-001System Valve Actuator
1-87-120044-001Test Cartridge
1-87-120043-001System Cartridge
1-87-120058-001EMT Connector Kit
1-87-120010-001Control Box KRS-50
1-60-9197228-000DPDT Microswitch for KRS-50 only
1-87-120039-001Microswitch SPDT Solid colour tails
1-87-120045-001High-Pressure Hose (required for cylinder mounted Control System)
1-87-120042-001System Valve Actuator
1-83-100034-001Electric Actuator Kit, 24 VDC for 87-120099-001
1-87-120039-001Microswitch SPDT Solid colour tails
1-87-120058-001EMT Connector & O-ring kit, 3 sets (Required for Industrial Systems. No substitutes)
1-87-120043-001Nitrogen Cartridge for Kidde XV Control System
1-87-120044-001Test Cartridge for Kidde XV Control System
1-60-9197108-000Keeper Pin (XV Control System)
1-87-120046-002XV Valve Rebuild Kit; including Puncture Pin, Label, Gasket, O Ring & E Ring
Note: All nozzles are sold in packs of 10
1-87-120016-001ADP nozzle pack
1-87-120017-001F nozzle pack
1-87-120018-001GRW nozzle pack
1-87-120019-001R nozzle pack
1-87-120020-001DM nozzle pack
1-87-120023-001LPF nozzle pack
1-87-120025-001LPR nozzle pack
1-87-120021-0013/8 swivel adaptor for nozzles
1-60-9197054-000Replacement nozzle seals
1-60-9197290-000Disc Cap
1-87-120026-001Disc Cap for LPR only
1-87-120110-001End of line remote manual release NEW
1-87-120053-001Inline kit for remote manual release
1-87-120050-001End – of – line remote manual release (recessed)
1-87-120110-001REMOTE MAN. RELEASE (NEW)
1-875572Pull to trip manual release
1-60-9197227-000SPDT microswitch [KRS-50 only]
1-60-9197228-000DPDT microswitch for [KRS-50 only]
1-87-120064-001Fusible Link Housing Kit (KRS-50 & Mechanical Control Head)
Includes: 1 bracket,  2 “S” Hooks,  2 Cable Crimp Sleeves
1-87-120060-001Fusible Link for [KRS-50 & Mechanical Control Head] 360oF
Other link temperatures available on request
1-87-120091-212Thermo bubl link 100°C                        Pack of 5 pcs.
1-87-120091-286Thermo bubl link 141°C                        Pack of 5 pcs.
1-87-120091-360Thermo bubl link 182°C                        Pack of 5 pcs.
1-87-120091-500Thermo bubl link 260°C                        Pack of 5 pcs.
1-804548Fusible Link Housing Kit (For use only with mechanical control head)
Includes:  1 bracket, 2 1/2″ EMT Connector, 1 “S” Hook, 4 Cable Crimp Sleeve
1-282661Fusible Link 165oF (74°c) – Yellow
1-282662Fusible Link 212oF (100°c) – White
1-282664Fusible Link 360oF (182°c) – Unpainted
1-282666Fusible Link 500oF (260°c) – Orange
1-875572Mechanical Remote Manual Release
1-1593-0002Quartzoid Bulb Link 400oF
1-1593-0002Quartzoid Bulb Link 500oF
1-844648Corner Pulley
1-843791Tee Pulley
1-60-9197286-0003 Way Pulley – For inline remote only (10 pack)
1-219649Cable. 1/16″ x 500ft. Long
1-843837EMT Adapter, 1/2″ EMT x 3/8″ NPT
1-214951Cable Crimp Sleeve – 50 pieces
1-87-9189413-000S Hook – 50 pieces
1-60-9196984-000Vent plug. One to be used in each set of piping.
1-87-100001-0013/4″ NPT
1-87-100001-0021″ NPT
1-60-9197017-0001/2″ NPT Electronic Solenoid Gas Shutoff Valve
1-60-9197018-0003/4″ NPT Electronic Solenoid Gas Shutoff Valve
1-60-9197019-0001″ NPT Electronic Solenoid Gas Shutoff Valve
1-60-9197020-0001 1/4″ NPT Electronic Solenoid Gas Shutoff Valve
1-60-9197021-0001 1/2″ NPT Electric Solenoid Gas Shutoff Valve
1-60-9197022-0002″ NPT Electronic Solenoid Gas Shutoff Valve
1-60-9197444-0002 1/2″ NPT Electonic Solenoid Gas Shutoff Valve
1-60-9197445-0003″ NPT Electronic Solenoid Gas Shutoff Valve
1-60-9101735-000Manual Reset Relay (Required)
1-26504601Compression-Seal Adapter – 3/8″ Tubing
1-26504602Compression-Seal Adapter – 1/2″ Tubing / 1/4″ Pipe
1-26504603Compression-Seal Adapter – 5/8″ Tubing / 3/8″ Pipe
1-26504605Compression-Seal Adapter – 3/4″ Tubing / 1/2″ Pipe
1-26504604Compression-Seal Adapter – 1/2″ EMT
1-26499301Quik-SealTM Adapter – 3/8″ NPT Female
1-26499302Quik-SealTM Adapter – 1/2″ NPT Female
1-26499303Quik-SealTM Adapter – 3/4″ NPT Female
1-87-120009-001Valve Assembly
1-06-118031-001Replacement Gauge
1-87-120067-001Valve Rebuild kit
1-877343Valve Stem Assembly
1-217768Valve Spring
1-253299Spring Retainer
1-18490004Retaining Ring Check – Minimum 10 pieces (each price)
1-257754Fusible Plug – each
1-566103270-Ring – Valve to Cylinder – Minimum 10 Pieces (each price)
1-643500060-Ring – Valve Stem – Minimum 10 Pieces (each price)
1-60-9197210-000Valve Body Assembly, KRS-50
1-60-9197220-000Cable Tensioning Block, KRS-50
1-60-1419239-0000-Ring, Puncture Stern, KRS-50
1-60-9197213-000Flat Gasket, Valve Body, KRS-50
1-WK-263303-000Check Valve for Pneumatic Actuator
1-15262Seal Wire
1-277088Back Plate (for P/N 875572 Manual Release)
1-255096Protection Plate (for Valve Top)
1-255681Valve Outlet Anti-Recoil Plate
1-108019-0000-Ring (for Elbow Bracket and Recharge Adapter) – Minimum 10 Pieces
1-899996Nameplate & Handle Ass’y (for Mech., Elec. and Pneumatic Control Heads)
1-294614Nameplate (for P/N 899082 Tandem Control Heads)
1-64490024Fuse (for P/N 899175 Electric Control Heads
1-253538Positive Action Crimp Tool
1-281578Control Head Test Fixture
1-279262Recharge Adapter
1-878453Hydrostatic Test Adapter
1-06-235557-001CO2 Cartridge for KRS-50
1-87-120030-0001.25 Gallon “APCTM” Wet Chemical Recharge Container
1-87-120031-0012.66 Gallon “APCTM” Wet Chemical Recharge Container
1-87-120032-0014.00 Gallon “APCTM” Wet Chemical Recharge Container
1-87-120033-0016.00 Gallon “APCTM” Wet Chemical Recharge Container
1-60-9197086-000Inlet Flushing Adapter WHDR
1-60-9197091-000Outlet Flushing Adapter, 1/2 WHDR
1-60-9197088-000Outlet Flushing Adapter, 1/8 WHDR
1-60-9197089-000Outlet Flushing Adapter, 1/4 WHDR
1-60-9197090-000Outlet Flushing Adapter, 3/8 WHDR
1-87-122000-001Wet Chemical System Instruction Manual
1-87-120040-001Wet Chemical System Owners Manual (APC)

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