Specifications
The numbers behind the network.
Indicative technical specifications drawn from the Kelavi Resident Installation & Billing System design — confirm final values against site design and equipment data sheets.
LPG Unit · System Specification · 2026
Bulk storage
5-tonne LPG tank — key figures
A single vessel sized to supply a full estate, mounted on a concrete-footed support stand in a fenced, fire-protected yard.
| Specification | Value (5-ton tank) | Notes |
|---|---|---|
| Propane stored | ~5,850 kg | Approx. LPG mix basis |
| Total volume | 11,750 L | Filled to max 85% |
| Length | 8.15 m | Total tank length |
| Diameter | 1.70 m | Cylindrical diameter |
| Leg spacing (centre-to-centre) | 5.85 m | Support stand spacing |
| Total height | 2.05 m | Top to ground |
| Footing width (E) | 2.00 m | Foundation width |
| Width of legs | 0.20 m | Structural requirement |
| Maximum ground load | 50,000 kg | Per manufacturer spec |
| Weight of empty tank | ~2,800 kg | Structural design |
| Weight filled with water | ~12,300 kg | Water test basis |
Apartment & building
Distribution infrastructure
From the buried estate main to the appliance connection, every element is specified with its placement.
Pipeline network & infrastructure
- Underground LPG pipeline (MDPE / coated steel)
- Buried 600–900 mm
- Warning tape (LPG BURIED)
- ~300 mm above pipe
- Tracer wire / markers
- Buried with pipe
- Above-ground steel risers
- Outside building wall
- Transition fittings (PE→steel)
- At risers
- Isolation ball / gate valves
- At risers & entry points
Building entrance (main distribution)
- Fireproof gas cabinet
- Exterior wall, near riser
- 2nd-stage regulator (building)
- Inside cabinet — 1.0 bar → ~34 mbar
- OPSO / UPSO shut-offs
- Downstream of regulator
- Excess-flow + manual shutoff valve
- Cabinet
- Low-pressure gauge & filter
- Cabinet
- Drip leg / sediment trap
- Cabinet
Inside each apartment
- Apartment shutoff valve
- Outside door / utility box
- LoRaWAN smart gas meter
- After isolation valve, before distribution
- Low-pressure copper pipe (BS EN 1057)
- Concealed in walls / trunking
- Gas + CO detectors
- Below-hob & near sleeping areas
- Auto shut-off solenoid (24 V)
- Linked to detector
- Cooker connection + approved hose
- Kitchen — 1.5 m rated
Materials summary
Certified, standards-based materials
| Component | Recommended material |
|---|---|
| Main estate piping | MDPE (PE100 SDR11) or coated steel |
| Above-ground risers | Galvanized steel (API / BS standards) |
| Building distribution | Copper (BS EN 1057) / coated steel |
| Flexible connection to cooker | Certified reinforced LPG hose |
| Valves | Brass / steel, LPG-rated |
| Regulators | EN / NFPA certified gas regulators |
Hardware BOM
Digital system — per building / 84 units
Field devices
- LoRaWAN smart gas meters
- 84 units — ultrasonic, valve relay, 5-yr battery
- LoRaWAN gas leak detectors
- 84 apartments + yard / plant room
- Solenoid shut-off valves
- 24 V fail-safe, 1 per apartment + building ESD
- LoRaWAN gateway(s)
- 1–3 per building, Ethernet + cellular, PoE, GPS
- LoRa antennas
- Roof/external — omni + directional for blind spots
- UPS for gateway
- 1 kVA+ for graceful operation
Server / cloud
- Network + app + DB servers
- 2 vCPU, 8 GB RAM start; scale with load
- MQTT broker
- Mosquitto / EMQX
- Database
- PostgreSQL (+ Redis cache/queues)
- Object storage
- S3 for logs & reports (optional)
Integration
- M-Pesa (Daraja)
- Lipa na M-Pesa merchant — C2B / STK credentials
- SMS gateway
- OTP & payment confirmations
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