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Main 170 Litre Direct Unvented Hot Water Cylinder - 720636101

by Main
SKU 720636101
Original price £496.57 - Original price £496.57
Original price
£496.57
£496.57 - £496.57
Current price £496.57

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The Main 170 Litre Direct Unvented Hot Water Cylinder (720636101) is a UK-manufactured stainless steel cylinder designed to provide reliable mains-pressure hot water for medium-sized domestic properties. With a 170 litre capacity and two factory-fitted Incoloy 800 immersion heaters, it is well suited to medium-sized homes, flats, solar PV installations and properties using off-peak electricity tariffs.

170 Litre Capacity 2 × 3.0kW Immersion Heaters Direct Unvented 25-Year Inner Vessel Warranty
Capacity
170 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
1.92 kWh/24h
50mm polyurethane insulation

Applications & suitability

Medium-Sized Homes

The 170 litre capacity provides a practical stored hot water solution for medium-sized domestic properties.

Flats & Apartments

Suitable for flats and apartments requiring reliable mains-pressure hot water from a stored cylinder system.

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 makes the cylinder suitable for properties using off-peak electricity tariffs.

Key specifications

Product Code 720636101
Type Direct Unvented
Nominal Capacity 170 Litres
Height (A) 1241 mm
Diameter Ø 550 mm cylinder / 595 mm base
Weight (Empty) 33 kg
Immersion Rating 2 × 3.0 kW @ 240V
Heat-Up Time 173 mins
Standing Heat Loss 1.92 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 18 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 an 18 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 170 litre cylinder.

50mm Insulation

Factory-injected 50mm CFC/HCFC-free polyurethane foam helps minimise standing heat loss.

170 Litre Storage

The 170 litre capacity provides a practical balance of stored hot water capacity for medium-sized domestic installations.

Additional installation features

18 Litre Expansion Vessel

Supplied with an 18 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 170 Litre Direct Unvented Hot Water Cylinder is ideal for medium-sized 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 170 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 Number720636101
Capacity170 litres
Height1241mm
Diameter550mm
Weight (empty)33kg
Weight (full)203kg
Standing Loss80W
ErP Energy ClassC
Power240V
ModesElectric Immersion Heating
MountingFloor mounted
FinishWhite thermoplastic / coated steel
DimensionsH 1241 × Ø 550 mm
Warranty25 years inner vessel, 1 year parts & labour

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