RM 120 Litre Intercyl Indirect Slimline Unvented Hot Water Cylinder


inc VAT

Available 2 – 4 Working Days
Intercyl indirect slimline cylinders are a competent and reliable companion for any standard boiler and are manufactured using high quality duplex stainless steel.
RM Cylinders

RM Intercyl I120IS Details

RM Intercyl indirect slimline cylinders at just 475mm in diameter make a competent and reliable companion for any standard boiler. The high efficiency, quick recovery coils make this cylinder perfect for even the busiest homes, ensuring long lasting hot water stores in a unit that has been built to last.

Internal Expansion
The internal airgap/expansion chamber allows the unit to be installed without the use of an external expansion vessel. The airgap is managed by a specially designed and crafted floating baffle. When the unit is commissioned and filled with water, the baffle traps a separate air pocket in the dome of the unit which acts as the working expansion. As the cylinder heats, expands and cools the baffle rises and falls in line with these changes allowing pressue to be absorbed. The baffle moves up and down internally on a dip tube that also acts as the hot draw off pipe allowing excellent delivery of water to all taps and showers. Technical details of the Intercyl

  • 1203mm x 475mm
  • 3 bar working pressure
  • 22mm compression fittings throughout
  • 3kW incoloy immersion
  • 50mm insulation
  • 1mm superior duplex stainless steel
  • Flat base for stability
  • Clearly labelled unit connections
  • Butt welding for long life
  • Integral stainless steel thermostatic pockets
  • Secondary return supplied on 210 litres units and above
  • High efficiency coil-in coil
  • 25 year guarantee
  • Weight when full: 134kg
  • ErP rating: A
  • Cold capacity: 104 litres
  • Standing heat loss: 1.13 kWH/24 hours
  • Heat exchanger: 14.94kw
  • Full unvented installation kit provided

Tapping Heights

  • Cold feed connection: 162mm
  • Lower coil connection: 288mm
  • Lower immersion heater: 368mm
  • Lower thermostatic pocket: 388mm
  • T&P relief valve: 772mm
Please note RM cylinders are made to measure and cancellations/returns are subject to up to a 35% administration fee
More Information
ManufacturerRM Cylinders
Manufacturer's Guarantee25 Years
BrandRM Cylinders
ColourBrushed Copper
Product TypeSlimline Indirect
Valves IncludedNo
Cylinder SystemUnvented


Most Mainland UK Postcodes

All RM Cylinders hot water cylinders are delivered directly from the manufacturer to you.

Product Type / ValueServicePrice (Inc VAT)
Copper Cylinders Economy Courier Delivery (3 - 5 Days) Free
Standard Courier Delivery (2 -3 Days) £6.95
Next Working Day if ordered by 12.00 PM £12.00
Stainless Steel Unvented Cylinders up to 300 Litres Economy Courier Delivery (3 - 5 Days) Free
Standard Courier Delivery (2 -3 Days) £6.95
Next Working Day if ordered by 12:00 PM £12.00
Stainless Steel Vented (Aquastel Range) Economy Courier Delivery (3 - 5 Days) Free
Standard Courier Delivery (2 -3 Days) £6.95
Next Working Day £12.00
Made To Order Cylinders 7 - 10 Working Days £6.95
All items in this category Next Working Day and Saturday Deliveries Call to check
All items in this category Collection from Maidenhead - usually 1-3 working days
We will contact you when your order is ready
Free of charge

For collections please do not travel until you have had confirmation your order is ready.

If you need items urgently, please call ahead to check lead times. Our Sales Team are available on 01628 760 440 Monday to Friday 8.00am to 5.00pm.

We do not recommend Tradesmen are booked until items are safely received and checked.



RM Cylinders

RM Cylinders are delivered directly from the manufacturer. Delivery charges are calculated at the checkout. Standard delivery to England, Wales and parts of Scotland starts from only £6.95 for RM Cylinders Hot Water Cylinders although exceptions do apply and are listed below.

Please note:

Deliveries are generally only made on working days. Working day refers to Monday to Friday and excludes weekends and Bank Holidays. The delivery options on this page relate to this product only and may not be available if other items are added to your basket. Only one delivery charge is made per order and the highest will normally take precedence.

Returning an item

We offer a no quibble 14 day returns policy on all goods supplied, subject to a few minor exceptions. Find out more on our Returns Policy page.


Highlands & Islands of Scotland (and postcode exceptions)

ItemsServicePrice (Inc VAT)
Hot Water Cylinders Direct From Manufacturer £36.00

Includes the following postcodes:
AB36-AB38, AB55-AB56, FK17-FK21, HS, IV1-56, IV70, IV63, KA27, KA28, KW1-KW17, PA20-PA45, PA47-PA49, PA60-PA78, PH19-PH26, PH30-PH44, PH49-PH50, TR21-TR25, ZE


Northern Ireland Services (BT Postcodes)Price (Inc VAT)
Direct From Manufacturer - Usually 3 - 5 working days £54.00
Express Delivery and Saturday Delivery Not Available
Ireland (Eire) ServicesPrice (No VAT)
Direct From Manufacturer - Usually 3 - 5 working days £50.00
Express Delivery and Saturday Delivery Not Available

Channel Islands & Isle of Man

JE, GY, IM Postcode ServicesPrice (No VAT)
Direct From Manufacturer - Usually 4 - 6 working days £18.00
Express Delivery and Saturday Delivery Not Available


All delivery times and dates especially next working day and weekend delivery times are always provided as a guide and are not 'guaranteed'. We use reliable couriers with a 99.9% success rate however once a consignment is within the courier network there is always a very small chance something could go wrong, however unforeseen. Trading Depot will not be liable for any costs incurred by any such delays waiting for goods. Trading Depot advises strongly against booking Tradesmen until after goods are safely received and checked for this exact reason.

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