🔧 Introduction — What is a GI Cap Plug?
A Galvanized Iron (GI) Cap Plug is a threaded fitting used to seal the open end of a pipe. It is an essential plumbing component that prevents leaks, contamination, and pressure loss by securely capping off unused or future pipe connections.
Made from high-quality malleable iron and coated with zinc galvanization, a GI Cap Plug combines strength, durability, and corrosion resistance, making it ideal for both residential and industrial applications.
At TapMaster Kenya, we supply premium GI Cap Plugs in all standard sizes — ensuring tight seals, accurate threading, and dependable performance for every plumbing system.
💪 Why Choose GI Cap Plugs?
- Superior Corrosion Resistance
The zinc coating protects the fitting from rust and oxidation, even in humid or outdoor environments. - Strong and Long-Lasting
Malleable iron construction ensures excellent mechanical strength for high-pressure systems. - Leak-Proof Sealing
Perfectly cut threads form a tight connection to prevent leakage or backflow. - Easy to Install and Remove
Simply screw onto the pipe end — no welding or special tools required. - Versatile Use
Ideal for sealing water, gas, air, or oil pipelines in domestic, commercial, and industrial systems.
📏 Common Sizes and Specifications
At TapMaster Kenya, we stock GI Cap Plugs in all major BSP (British Standard Pipe) sizes — ensuring compatibility with standard galvanized pipe systems.
| Size (Inches) | Thread Type | Material | Finish | Typical Use |
|---|---|---|---|---|
| ½″ | BSP Female | GI Iron | Hot-dip Galvanized | Domestic plumbing |
| ¾″ | BSP Female | GI Iron | Hot-dip Galvanized | Pipe termination |
| 1″ | BSP Female | GI Iron | Hot-dip Galvanized | Commercial pipelines |
| 1¼″ – 2″ | BSP Female | GI Iron | Hot-dip Galvanized | Industrial or irrigation systems |
Pressure Rating: Up to 25 bar
Thread Standard: BSP (ISO 7-1)
Finish: Silver or matte galvanized
💡 Applications of GI Cap Plugs
- Sealing the end of unused pipelines
- Capping water supply lines temporarily or permanently
- Protecting pipe interiors during construction
- Pressure testing of plumbing systems
- Industrial fluid and air pipelines
⚙️ Installation Tips
- Clean the pipe threads before installation.
- Apply PTFE tape or thread sealant for a watertight joint.
- Hand-tighten first, then use a wrench for a secure fit (avoid over-tightening).
- Inspect galvanization — if damaged, replace or recoat to prevent corrosion.
🧱 GI Cap Plug vs. GI Plug
| Feature | GI Cap Plug | GI Plug |
|---|---|---|
| Thread Type | Female | Male |
| Installation | Screws over external threads | Screws inside female threads |
| Typical Use | Seals pipe end from outside | Seals fitting from inside |
| Appearance | Dome-shaped end | Flat or hexagonal head |
| Common Use | Domestic water systems | Industrial pressure systems |
Verdict:
The GI Cap Plug is ideal for sealing pipe ends externally — offering convenience, reusability, and excellent corrosion resistance for everyday plumbing applications.
🏪 Why Buy GI Cap Plugs from TapMaster Kenya?
At TapMaster Kenya, we pride ourselves on being one of the top suppliers of plumbing and sanitary fittings in the country.
✔️ High-Quality Fittings: Made from premium malleable iron with a durable zinc coating.
🚚 Same-Day Delivery: Available for Nairobi and select towns.
🇰🇪 Countrywide Shipping: We deliver across all counties in Kenya.
🔧 Wide Variety: All GI fittings — including elbows, tees, nipples, and sockets — available in multiple sizes.
💬 Easy Ordering: Shop online at tapmaster.co.ke or WhatsApp our sales team for quick service.
👉 Order your GI Cap Plug today from TapMaster Kenya — durable, reliable, and delivered to your doorstep!
🧰 Maintenance Tips
- Regularly inspect pipe ends for signs of corrosion.
- Reapply thread sealant if the cap plug is removed and reused.
- Store unused fittings in a dry place.
- Replace any fitting showing visible rust or thread wear.
💬 FAQ
A GI Cap Plug seals the open end of a pipe, preventing leaks, contamination, or dirt from entering the system.
TapMaster Kenya offers sizes from ½″ to 2″, suitable for domestic, commercial, and industrial use.
Yes — the zinc coating prevents corrosion, making them suitable for both indoor and outdoor applications.
Yes. As long as the threads are intact and the galvanization remains undamaged, GI Cap Plugs can be reused safely.
Yes — we offer same-day delivery in Nairobi and nationwide shipping across Kenya.
Looking for reliable GI Cap Plugs in Kenya?
Order from TapMaster Kenya today and enjoy same-day delivery in Nairobi and countrywide shipping to all counties.
🛒 Visit tapmaster.co.ke to place your order now.