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Main 150 Litre Direct Unvented Hot Water Cylinder - 720636001

by Main
SKU 720636001
Original price £472.45 - Original price £472.45
Original price
£472.45
£472.45 - £472.45
Current price £472.45

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The Main 150 Litre Direct Unvented Hot Water Cylinder (720636001) is a UK-manufactured stainless steel cylinder designed to provide reliable mains-pressure hot water for smaller domestic properties. With a 150 litre capacity and two factory-fitted Incoloy 800 immersion heaters, it is well suited to small to medium homes, flats, solar PV installations and properties using off-peak electricity tariffs.

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 720636001
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 (Main Heating)
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 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 (Main Heating), 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.

Specifications

BrandMain
Part Number720636001
Capacity150 litres
Height1114mm
Diameter550mm
Weight (empty)30kg
Weight (full)180kg
Standing Loss71W
ErP Energy ClassC
Power240V
ModesElectric Immersion Heating
MountingFloor mounted
FinishWhite thermoplastic / coated steel
DimensionsH 1114 × Ø 550 mm
Warranty25 years inner vessel, 1 year parts & labour

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