The Megaflo Eco SystemReady 125SB is a 125-litre indirect unvented hot water cylinder designed for system boiler installations. It combines the performance of the Megaflo Eco range with factory-fitted plumbing and wiring, helping to reduce installation time and provide a consistently neat installation finish.
Factory-fitted components include a 1 × 3kW immersion heater with pre-wired thermal controls, temperature and pressure relief valve, tundish, wiring centre and 22mm 2-port motorised valve. An internal floating baffle expansion vessel is built into the cylinder shell, eliminating the need for a separate external expansion vessel.
125L Capacity
Indirect Unvented
1 × 3kW Immersion
76 L/min at 3 Bar
ERP Rating B
Key Highlights
76 L/min
Max Flow at 3 Bar
Applications & Suitability
- System boiler installations requiring an indirect unvented hot water cylinder
- Installations where factory-fitted plumbing and wiring can help reduce installation time
- Domestic hot water systems requiring a 125-litre cylinder
- Projects where a consistently neat installation finish is important
- Installations requiring mains-pressure hot water storage with system boiler primary connections
Key Specifications
| Product Name |
Megaflo Eco SystemReady 125SB |
| Product Code |
95050497 |
| Cylinder Type |
Indirect Unvented |
| Nominal Capacity |
125 litres |
| Height |
1102mm |
| Width |
579mm |
| Depth |
710mm |
| Weight Empty / Full |
39 kg / 179 kg |
| Standing Heat Loss |
1.05 kWh/24h |
| Max Flow at 3 Bar |
76 l/min |
| Max Flow at 1 Bar |
45 l/min |
| Heat-Up Time |
23 min (15 l/min, 80°C primary, 15°C–60°C) |
| Recovery at 70% Draw-Off |
15 min |
| Backup Immersion |
1 × 3kW @ 240V |
| Operating Pressure |
3 bar (0.3 MPa) |
| Max Mains Pressure |
16 bar (1.6 MPa) |
| Min Recommended Supply Pressure |
1.5 bar / 20 l/min |
| Inner Vessel |
High Grade Duplex Stainless Steel |
| Insulation |
60mm CFC/HCFC-Free Polyurethane Foam |
| ERP Rating |
B |
Factory-Fitted Plumbing & Wiring
The Megaflo Eco SystemReady 125SB is supplied with key plumbing and electrical components already factory fitted to the cylinder. This design helps reduce installation time while providing a consistently neat finish.
-
1 × 3kW immersion heater with cylinder thermostat and high-limit overheat cut-out, pre-wired
-
Temperature & pressure relief valve set at 90°C / 10 bar, with T&P insulation kit fitted
-
15/22mm tundish, factory fitted
-
Wiring centre and 22mm 2-port motorised valve, pre-fitted and wired
-
Internal floating baffle expansion vessel built into the cylinder shell
Integrated Expansion Vessel
The cylinder incorporates an internal floating baffle expansion vessel within the cylinder shell. This means a separate external expansion vessel is not required for the cylinder's integrated expansion arrangement.
Supplied Cold Water Inlet Control Kit
The cold water inlet control kit is supplied with the cylinder for fitting on site by the installer. It comprises the components required for the cylinder inlet arrangement.
- 3 bar (0.3 MPa) pressure reducing valve
- 8 bar (0.8 MPa) pressure relief valve
- ¼-turn isolating valve
- Line strainer
- Non-return valve
- Drain valve
The supplied pressure relief valve is specified to BS EN 1567, BS EN 1491 and EN 13959.
Installer Connections
The following connections are made on site by the installer:
- Cold mains supply to the cylinder inlet via the supplied inlet control kit
- Hot water outlet to the distribution pipework
- Primary flow and return from the system boiler
- Tundish discharge pipe to a compliant termination point in accordance with Building Regulations Part G
- 230V electrical supply to the wiring centre
High-Grade Duplex Stainless-Steel Vessel
The inner vessel is manufactured from high-grade duplex stainless steel. The cylinder also features 60mm CFC/HCFC-free polyurethane foam insulation and has a stated standing heat loss of 1.05 kWh/24h.
60mm Insulation
CFC/HCFC-free polyurethane foam insulation.
1.05 kWh/24h
Stated standing heat loss.
125 Litres
Nominal hot water storage capacity.
Hot Water Flow & Recovery
The Megaflo Eco SystemReady 125SB provides a stated maximum flow of 76 l/min at 3 bar and 45 l/min at 1 bar. The specified heat-up time is 23 minutes under the stated test conditions of 15 l/min, 80°C primary and 15°C–60°C, with a 15-minute recovery time at 70% draw-off.
ERP Rating B
The cylinder has an ERP rating of B and uses 60mm CFC/HCFC-free polyurethane foam insulation. Its stated standing heat loss is 1.05 kWh/24h.
ERP Rating: B | Standing Heat Loss: 1.05 kWh/24h
Ideal For
- System boiler installations
- Domestic hot water systems requiring 125-litre storage
- Installations where factory-fitted plumbing and wiring can simplify installation
- Projects requiring an indirect unvented cylinder
- Installations requiring high-grade duplex stainless-steel construction
- Applications requiring mains-pressure hot water flow
Frequently Asked Questions
What is the capacity of the Megaflo Eco SystemReady 125SB?
The cylinder has a 125-litre nominal capacity.
Is the Megaflo Eco SystemReady 125SB direct or indirect?
The Megaflo Eco SystemReady 125SB is an indirect unvented hot water cylinder designed for system boiler installations.
Does it include an immersion heater?
Yes. It has 1 × 3kW backup immersion heater specified at 240V, with the immersion heater and thermal controls factory fitted and pre-wired.
Does it require a separate external expansion vessel?
No separate external expansion vessel is required for the integrated expansion arrangement because the cylinder has an internal floating baffle expansion vessel built into the cylinder shell.
What is the maximum mains pressure?
The specified maximum mains pressure is 16 bar (1.6 MPa), with an operating pressure of 3 bar (0.3 MPa).
What is the maximum flow rate?
The maximum stated flow is 76 l/min at 3 bar and 45 l/min at 1 bar.
What insulation does the cylinder use?
The cylinder uses 60mm CFC/HCFC-free polyurethane foam insulation.
What is the ERP rating?
The Megaflo Eco SystemReady 125SB has an ERP rating of B.
Megaflo Eco SystemReady 125SB
The Megaflo Eco SystemReady 125SB is a 125-litre indirect unvented hot water cylinder designed for system boiler installations. With factory-fitted plumbing and wiring, a pre-wired 3kW immersion heater, integrated floating baffle expansion vessel, high-grade duplex stainless-steel inner vessel and 60mm CFC/HCFC-free polyurethane foam insulation, it provides a practical solution for installations where reduced installation time and a neat finish are important. The cylinder has an ERP rating of B, 76 l/min maximum flow at 3 bar and a stated standing heat loss of 1.05 kWh/24h.
Order the Megaflo Eco SystemReady 125SB
Choose the 95050497 for a factory-prepared indirect unvented cylinder solution designed for system boiler installations.
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