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Robust and built to last Glow-worm cylinders are designed to work with any boiler in the UK

Glow-worm provides a wide range of mains-fed unvented hot water cylinders that are designed to work with any UK boiler, not just the Glow-worm range, in open vented and sealed heating systems.

Each manufactured from high grade stainless steel, with laser welded seams and guaranteed against perforation of the steel shell for 25 years. All Glow-worm cylinders have excellent insulation that achieves heat loss as low as 1.7kWh and a high recover heating coil that reheats the cylinder in as little as 20 minutes.



     
  Size (ltrs) Height Width  
  115 969 600  
  150 1179 600  
  175 1339 600  
  175 1339 600  
  200 1499 600  
  300 2109 600  
  measurements in millimeters  
       
  High grade stainless steel cylinder with laser welded seams  
  Insulation meets CheSS best practice as low as 1.7 kWh  
  High recovery heating coil - just 20 minutes  
  External expansion vessel (supplied)  
  Expansion vessel wall mounting bracket  
  Simple front connection compression fittings  
  Back-up immersion heater on all models  
  Covered controls and wiring box  
  Simple maintenance - no anode required  
  High flow rates achievable working at 3.5bar pressure  
     
  Open Vent  
  System  
   
   
     
  Installation manuals