Kastom Solar 350 Litres Non Pressurized Solar Water Heater | Gravity Flow

Kastom Solar 350 Litres Non-Pressurized Solar Water Heater is the flagship large‑capacity gravity‑flow system in the Kastom range, designed for large families, small hotels, schools, lodges, or commercial facilities with very high hot water demand where mains water pressure is low or absent. It operates entirely without electricity using the natural thermosiphon principle.

How it works:
Cold water from a roof‑mounted header tank (or borehole storage tank) flows into the solar collectors. Solar radiation heats the water, which becomes less dense and rises naturally into the 350‑liter storage tank. Cooler water from the tank descends back to the collectors, creating a continuous circulation loop. Hot water is then delivered by gravity only – no pump, no controller, no electricity required. The system is open‑loop (non‑pressurized) and requires a header tank elevated at least 1 metre above the heater.

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 (60 mm thick) – closed‑cell structure minimises heat loss, keeping water hot for 48+ hours.
• Pressure rating: Non‑pressurized (gravity flow). Works with header tanks as low as 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 fasteners, UV‑resistant outer shell.

Best suited for:

• 8–9 people (recommended user count – same as 300L model but with extra storage buffer).
• Large homes, small hotels (2–3 rooms), lodges, boarding schools, clinics, churches, community centres.
• Gravity‑fed systems with low or no mains pressure (<0.5 bar).
• Off‑grid installations (no electricity needed).
• Borehole water applications – optional sacrificial anode or special coating.

Advantages & Benefits:

• Zero electricity cost – no circulating pump, no differential controller, no moving parts.
• Corrosion‑proof tank – SUS304 stainless steel resists rust even with borehole water.
• Polyurethane insulation – retains heat up to 30% better than fibreglass.
• Extra storage buffer – 350L provides ample hot water for peak usage times.
• Low maintenance – occasional cleaning of collector glass and checking of connections.
• 5‑year warranty on tank and collector – backed by local East African 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)