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Indirect Hot Water Cylinder

Copper Indirect Hot Water Cylinders

Copper cylinder with boiler coil and optional immersion heater.

Index Page > Premium Hot Water Cylinders > Indirect Hot Water cylinders


Indirect Copper Cylinders

Hot water cylinder heated by boiler coil

Indirect cylinder showing boiler coil and side mounted immersion heater (top mounted heater optional)

Illustration: A typical indirect cylinder with boiler coil . Can be supplied with provision for immersion heater as required.

Indirect cylinders are generally configured to work in conjunction with wet central heating systems. Heat is imparted to the cylinder via an internal heat exchanger (boiler coil) through which hot water from the boiler flows (the heat source).

The contents of this type of cylinder is what appears at your taps.


Indirect hot water cylinder with cutaway showing boiler coil


Cylinder connections can be positioned as required.

Please specify when ordering

These are referred to as both 'vented' and 'gravity' type cylinders because the cold water feed to them is supplied from a cold water cistern (often sited in the loft) under gravity pressure (low pressure).

The cylinder is open vented and never under any more pressure than the weight of water from the header tank due to gravity.

Never connect a mains cold water feed to a gravity cylinder.

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INDIRECT Copper cylinder prices




Capacity (litres)

June 2019

inc VAT


Example sizes (Please ask if you require something else)

900 x 400 98  
1050 x 400 116  
825 x 450 91  
900 x 450 120  
1050 x 450 144  
1200 x 450 166  
1500 x 450 222  
1800 x 450 268  
1500 x 500 248  
1800 x 500 276  

Having difficulty choosing a cylinder from the range offered? Come and talk to us. We are one of the few companies with whom you can actually discuss your requirements!! We are always pleased to be of service. You only need to pick up the phone!

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Extras and additions (please add where appropriate to prices above) inc VAT
Immersion Heater  
Cylinder boss included if required, 3kW Incalloy Immersion heater additional extra 34.00 ea
Standard foam insulation (approx 50mm) exceeding Part L heat loss Included
Upgrade insulation to 75mm thickness 75.00
Upgrade insulation to 100mm thickness 152.00
Cylinder connections  
Drain valve (drain cock) 7.50
High recovery boiler coil (improves cylinder reheat time given sufficient input) 75.00
Power shower take-off 19.50
Secondary return 12.00
Compression fittings (instead of male or female threaded bosses) 12.00
For cylinder with gravity coil (for AGA, Rayburn, Woodburner etc) click here
Configuring the position of connections (please refer to guide) No additional cost
For other modifications please don't hesitate to ask  

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