| 421 | Viking VK610 - Microfast® SR/QREC Pendent HP Sprinkler (K5.6) | |
| 422 | Viking VK600 - Microfast® EC/QREC Pendent Sprinkler (K5.6) | |
| 423 | Viking VK353 - Microfast® Quick Response Fusible Element Pendent Sprinkler (K8.0) | |
| 424 | Viking VK355 - Microfast® Quick Response Fusible Element Conventional Sprinkler (K8.0) | |
| 425 | Viking VK351 - Microfast® Quick Response Fusible Element Upright Sprinkler (K8.0) | |
| 426 | Viking VK309 - Microfast® Quick Response Fusible Element Vertical Sidewall Sprinkler (K5.6) | |
| 427 | Viking VK320 - Microfast® HP Quick Response Fusible Element Horizontal Sidewall High Pressure Sprinkler (K5.6) | |
| 428 | Viking VK307 - Microfast® Quick Response Fusible Element Horizontal Sidewall Sprinkler (K5.6) | |
| 429 | Viking VK318 - Microfast® HP Quick Response Fusible Element Pendent High Pressure Sprinkler (K5.6) | |
| 430 | Viking VK303 - Microfast® Quick Response Fusible Element Pendent Sprinkler (K5.6) | |
| 431 | Viking VK311 - Microfast® Quick Response Conventional Fusible Element Sprinkler (K5.6) | |
| 432 | Viking VK316 - Microfast® HP Quick Response Fusible Element Upright High Pressure Sprinkler (K5.6) | |
| 433 | Viking VK301 - Microfast® Quick Response Fusible Element Upright Sprinkler (K5.6) | |
| 434 | Viking VK332 - Microfast® Quick Response Fusible Element Pendent Sprinkler (K4.2) | |
| 435 | Viking VK328 - Microfast® Quick Response Fusible Element Upright Sprinkler (K4.2) | |
| 436 | Viking VK346 - Microfast® HP Quick Response Fusible Element Horizontal Sidewall High Pressure Sprinkler (K2.8) | |
| 437 | Viking VK334 - Microfast® Quick Response Fusible Element Horizontal Sidewall Sprinkler (K2.8) | |
| 438 | Viking VK343 - Microfast® HP Quick Response Fusible Element Pendent High Pressure Sprinkler (K2.8) | |
| 439 | Viking VK330 - Microfast® Quick Response Fusible Element Pendent Sprinkler (K2.8) | |
| 440 | Viking VK341 - Microfast® HP Quick Response Fusible Element Upright High Pressure Sprinkler (K2.8) | |
| 441 | Viking VK326 - Microfast® Quick Response Fusible Element Upright Sprinkler (K2.8) | |
| 442 | Viking VK338, VK339 - Microfast QR Stainless Steel Sprinklers (K5.6) | |
| 443 | Viking VK360 - Quick Response Horizontal Sidewall Sprinkler (K8.0) | |
| 444 | Viking VK306 - Microfast® Quick Response Vertical Sidewall Sprinkler (K5.6) | |
| 445 | Viking VK319 - Microfast® HP Quick Response Horizontal Sidewall Sprinkler (K5.6) | |
| 446 | Viking VK305 - Microfast® Quick Response Horizontal Sidewall Sprinkler (K5.6) | |
| 447 | Viking VK337 - Microfast® Quick Response Vertical Sidewall Sprinkler (K4.2) | |
| 448 | Viking VK344 - Microfast® HP Quick Response Horizontal Sidewall High Pressure Sprinkler (K2.8) | |
| 449 | Viking VK333 - Microfast® Quick Response Horizontal Sidewall Sprinklers (K2.8) | |
| 450 | Viking VK3311 - Microfast® Quick Response Pendent Sprinkler (K4.2) - VdS Approved (Germany) | |