Megaflo Main is the new name for the Main unvented cylinder range. This model replaces the Main 150 Litre Direct Unvented Hot Water Cylinder (720636001).
150 Litre Capacity 2 × 3.0kW Immersion Heaters Direct Unvented 25-Year Inner Vessel Warranty
Capacity
150 Litres
Direct-fed unvented hot water
Immersion Heating
2 × 3.0kW
Incoloy 800 @ 240V
Operating Pressure
3.5 bar
Mains-pressure hot water system
Standing Heat Loss
1.70 kWh/24h
50mm polyurethane insulation
Applications & suitability
Small to Medium Homes
The 150 litre capacity provides a practical stored hot water solution for smaller and medium-sized domestic properties.
Flats & Apartments
A compact 150 litre storage capacity makes this cylinder suitable for flats and apartments requiring mains-pressure hot water.
Solar PV Systems
Suitable for installations using solar PV-generated electricity to heat stored domestic hot water.
Off-Peak Electricity
The direct immersion heating arrangement allows the cylinder to be used with off-peak electricity tariffs.
Key specifications
| Product Code |
7912284 |
| Type |
Direct Unvented |
| Nominal Capacity |
150 Litres |
| Height (A) |
1114 mm |
| Diameter |
Ø 550 mm cylinder / 595 mm base |
| Weight (Empty) |
30 kg |
| Immersion Rating |
2 × 3.0 kW @ 240V |
| Heat-Up Time |
152 mins |
| Standing Heat Loss |
1.70 kWh/24h |
| ErP Energy Rating |
C |
| Operating Pressure |
3.5 bar |
| Maximum Flow Rate |
Up to 55 l/min @ 6 bar |
| Inner Vessel |
High-grade stainless steel, 15 bar pressure tested |
| Insulation |
50mm CFC/HCFC-free polyurethane foam |
| Thermostat |
Adjustable 10–70°C with 80°C high-limit cut-out |
| Expansion Vessel |
12 litre, supplied |
| Connections |
22mm compression / ¾" BSP |
| Immersion Heater Material |
Incoloy 800 alloy |
| Approvals |
KIWA approved, Building Regulation G3 compliant, CE marked |
| Manufactured |
UK by Baxi |
| Warranty |
25 years on stainless steel inner vessel; 1 year parts & labour |
Installation & compatibility
Factory-supplied components: The cylinder is supplied with a 12 litre expansion vessel, T&P relief valve, pressure reducing valve and factory-fitted controls. Connections are provided as 22mm compression / ¾" BSP. The unit is KIWA approved and compliant with Building Regulation G3 requirements.
Design & performance benefits
Mains-Pressure Hot Water
Direct unvented operation provides stored hot water supplied from the mains-pressure system.
Dual Immersion Heating
Two 3.0kW Incoloy 800 immersion heaters provide direct electrical heating for the 150 litre cylinder.
50mm Insulation
Factory-injected 50mm CFC/HCFC-free polyurethane foam helps minimise standing heat loss.
Compact Capacity
The 150 litre capacity provides a practical stored hot water solution for smaller domestic installations.
Additional installation features
12 Litre Expansion Vessel
Supplied with a 12 litre expansion vessel as part of the unvented cylinder package.
Factory-Fitted Controls
Supplied with factory-fitted controls, pressure reducing valve and T&P relief valve.
Adjustable Thermostat
Temperature can be adjusted from 10–70°C with an 80°C high-limit cut-out.
Ideal for
The Megaflo Main 150 Litre Direct Unvented Hot Water Cylinder is ideal for small to medium homes, flats, apartments, solar PV systems and properties using off-peak electricity tariffs. It can also be paired with the Main Eco Compact System or Main Eco Elite System boilers as part of a complete domestic hot water solution.
Manufactured in the UK by Baxi, this 150 litre unvented cylinder combines high-grade stainless steel construction, direct immersion heating, 50mm polyurethane insulation and factory-supplied controls. It is KIWA approved, G3 compliant and backed by a 25-year stainless steel inner vessel warranty plus a one-year parts and labour warranty.
