Kastom Solar 300Ltrs Non Pressurized Solar Water Heater | Gravity Flow

The Kastom Solar 300Ltrs Non-Pressurized Solar Water Heater is the largest capacity model in the Kastom gravity‑flow series, designed for large households, small hotels, schools, or commercial facilities with high hot water demand and low or no mains water pressure. Operating entirely without electricity, it uses the thermosiphon principle to circulate water naturally between the solar collectors and the storage tank.

How it works:
Cold water from a roof‑mounted header tank or borehole storage tank flows into the solar collectors (evacuated tubes or flat plates). Solar radiation heats the water, which becomes less dense and rises into the 300‑liter storage tank. Simultaneously, cooler water from the tank descends back to the collectors, creating a natural circulation loop. Hot water is then delivered to taps, showers, or appliances by gravity only – no pump, no controller, no electricity required.

Key features:

• Tank outer finish: Available in white or shiny metallic – both UV‑stabilised for long outdoor life.
• Inner tank material: Premium SUS304 stainless steel (18/8 food‑grade) – excellent corrosion resistance. SUS316 (marine grade) optional for highly aggressive borehole water.
• Insulation: High‑density polyurethane foam (typically 55–60 mm thick) – closed‑cell structure minimises heat loss, keeping water hot for 24–48 hours.
• Pressure rating: Non‑pressurized (gravity flow). Requires only a header tank elevated at least 1 metre above the heater.
• Compliance: Fully WARMA approved for consumable borehole water in Kenya (Water Resources Authority).
• Durability: Heavy‑duty galvanised steel mounting frame, stainless steel bolts, and UV‑resistant outer shell.

Best suited for:

• 8–9 people (recommended user count).
• Large homes, small hotels, lodges, schools, boarding facilities, churches, clinics.
• Gravity‑fed systems where mains pressure is below 0.5 bar or non‑existent.
• Off‑grid installations (no grid electricity required).
• Borehole water applications – optional sacrificial anode or epoxy coating available.

Advantages & Benefits:

• Zero electricity cost – no circulating pump, no differential controller, no backup heater (though an electric backup can be added optionally).
• Corrosion‑proof tank – SUS304 stainless steel will not rust, even with borehole water.
• Polyurethane insulation – retains heat up to 30% better than fibreglass or polystyrene.
• Simple, reliable operation – no moving parts to fail.
• Low maintenance – occasional cleaning of collector glass and checking of connections.
• 5‑year warranty on tank and collector – backed by local support.

Warranty & Support (East Africa):

• 5 years warranty on tank and solar collector (against manufacturing defects).
• Genuine spare parts available locally.
• Professional servicing and repair.
• Expert installation support for solar water heaters.
• Countrywide delivery and after‑sales care (Kenya, Uganda, Tanzania, Rwanda, Burundi, South Sudan).

Contact Kreatives.co.ke:
Call/WhatsApp +254 790 108845 | +254 703 163326

✅ Key Features & Specifications (Summary Table)