The ONE-CYL pre-plumbed and pre-wired range of heat pump cylinders with an internal 4-port buffer tank for system hydraulic separation are made by World Heat Cylinders. The hydraulic separation and open water volume from the buffer tank helps with primary system flow rates and defrosting cycles. It’s a ONE fits all due to the large mounting bracket for any heat pump manufacturers main controller, tank kit or flow temperture controller. High quality British manufactured stainless steel domestic hot water solutions designed for any application. All ONE-CYL cylinders are manufractured under an ISO9001 certified quality management system in our purpose made manufacturing facility in Manchester. The full product range also boasts: a 28mm heat pump magnetic and particle filter, secondary circulation pump, 28mm 3-port diverter valve, 28mm 2-port heating zone valve, filling loop, pressure gauge, domestic hot water immersion heater and wiring centre all fitted and wired as standard. The ONE-CYL range sizes are: 150 Ltr, 180 Ltr, 210 Ltr, 250 Ltr and 300 Ltr all with internal 50 Ltr Buffer Tanks Plus 150 Ltr and 180 Ltr Slimline models both with internal 25 Ltr Buffer Tanks.