The TYCO TY3388 is the window horizontal sidewall model of the WS Window series, with a K 5.6 discharge coefficient and 1/2″ NPT thread, quick response and specific application window sprinkler, operated by a glass bulb. It is designed for protecting heat-strengthened, tempered or ceramic glass windows with closed sprinklers, as fire tested to the ASTM E119 time/temperature curve. Installed horizontal sidewall with the deflector oriented toward the window. For where the sprinkler sits in the whole system, see the complete guide to sprinkler systems in Saudi Arabia.
In short
- Model (SIN): TY3388 — Window Horizontal Sidewall.
- Discharge coefficient K 5.6, 1/2″ NPT connection.
- Glass bulb, quick response.
- Temperature ratings in the datasheet: 68 / 93 °C.
- Maximum working pressure: Horizontal sidewall 70 psi (cold solder limit), 175 psi with a baffle.
- Series approvals: UL, C-UL, NYC. The approval of each model, finish and rating is in the approvals table of datasheet TFP620.
How this sprinkler works
The glass bulb contains a fluid that expands when exposed to heat. When the rated temperature is reached, the fluid expands enough to shatter the bulb, the sprinkler opens and the deflector spreads the water over the fire area.
Installed horizontal sidewall with the deflector oriented toward the window. Quick response means the thermal element reacts faster, so the sprinkler operates earlier than a standard-response sprinkler of the same rating.
Models in the series
| SIN | Orientation | K-factor | Thread |
|---|---|---|---|
| TY3388 — this model | Window Horizontal Sidewall | 5.6 | 1/2″ NPT |
| TY3488 | Window Pendent Vertical Sidewall | 5.6 | 1/2″ NPT |
Links to the other models are in the “Similar models” table below. The choice of model comes from the hydraulic calculation, hazard classification and installation method in the project design.
Application notes
- The first sprinklers specifically listed to provide complete wetting and coverage of windows using closed sprinklers.
Technical data
| Item | Value |
|---|---|
| Model (SIN) | TY3388 |
| Orientation | Window Horizontal Sidewall |
| Discharge coefficient | K 5.6 gpm/psi½ (80.6 L/min/bar½) |
| Thread | 1/2″ NPT |
| Element and response | Glass bulb — Quick Response |
| Coverage | Specific application window sprinkler |
| Temperature ratings | 68 / 93 °C |
| Maximum working pressure | Horizontal sidewall 70 psi (cold solder limit), 175 psi with a baffle |
| Installation torque | 7 – 14 lb-ft (9.5 – 19.0 N·m) |
| Wrench | W-Type 20 |
| Approvals | UL, C-UL, NYC |
| Datasheet | TYCO TFP620 |
The critical point: glazing conditions
Protection is listed for specific glass types (heat-strengthened, tempered or ceramic) with set distances from mullions and a minimum flow of 20 GPM for 6 – 8 ft spacing or 15 GPM below 6 ft. No blinds or curtains between sprinkler and glass; not listed where intermediate horizontal mullions are present.
Installation steps
- Inspect before installing: never install a sprinkler whose bulb is cracked or has lost liquid.
- Install the sprinkler in its correct orientation (Window Horizontal Sidewall) as shown in the datasheet — never reversed.
- Apply pipe-thread sealant to the threads, then hand-tighten the sprinkler.
- Finish with the specified wrench (W-Type 20) within 7 – 14 lb-ft (9.5 – 19.0 N·m). Higher torque can distort the inlet and cause leakage.
Common mistakes
- Installing a sprinkler that was dropped, struck or slipped by the wrench. The datasheet requires any such sprinkler to be replaced.
- Painting or coating sprinklers on site. Sprinklers must not be altered after leaving the factory; altered sprinklers are replaced.
- Hanging objects from sprinklers, or cleaning them with anything other than a gentle feather duster.
Maintenance
Sprinklers that leak or show visible corrosion must be replaced, as must sprinklers exposed to corrosive products of combustion that cannot be fully cleaned. The owner is responsible for inspection, testing and maintenance to NFPA 25 and the authority having jurisdiction, preferably by a qualified inspection service. Before closing a main control valve for maintenance, obtain permission from the proper authorities and notify everyone affected.
Files and ordering
TYCO datasheet TFP620 and the available approval certificates are in the files section of this page. When ordering, state the model TY3388, temperature rating and finish. The datasheet lists the part numbers (P/N) for each combination.
How to order
Use the “Build your order” section on this page: add every model and quantity, then send the whole order by email or WhatsApp. It reaches us as a tidy PDF request sheet and we contact you with the quotation.
FAQ
What does TY3388 mean?
It is TYCO’s Sprinkler Identification Number (SIN). It identifies the exact model — orientation, K-factor and thread. The sprinkler is ordered by this number together with temperature rating and finish.
How do I choose the temperature rating?
From the highest expected ceiling temperature and the rating classes in the project’s governing standard, within the ratings available for this model in the datasheet.
Do all models in the series carry the same approvals?
Not always. The approvals table in datasheet TFP620 gives each model’s approvals by rating and finish, so check it when the project requires a specific approval.
What is the benefit of quick response?
The thermal element reacts faster, so the sprinkler operates earlier and limits heat and smoke spread; standards require it in some occupancies such as light hazard.
References
- TYCO TFP620 — Series datasheet (attached)
- NFPA 13 — Standard for the Installation of Sprinkler Systems
- NFPA 25 — Inspection, Testing and Maintenance of Water-Based Fire Protection Systems
- TYCO TFP700 — Installer warning for handling and installing sprinklers
This page is general information to help with selection and ordering, taken from the attached TYCO datasheet. Final design is set by the project’s approved designer; the project specification, the consultant’s drawings and the latest datasheet revision govern.
