Water heating Pre - plumb hot water cylinders All standard Pre-Plumb cylinders are indirect pre-wired and pre-plumbed with 'Y' Plan configuration that include a Danfoss CP715 HSP control pack and a Grundfos 15/50 circulating pump. The wiring centre will have a 0.85m lead for wall mounting with the programmer and room thermostat supplied loose. Standard Features 22mm compression cold feed & open vent/hot draw off BSI sizes to BS 1566 117 litres to 245 litres capacity High Duty Coil CFC free foam insulation Danfoss controls Use with vented or unvented primary systems Simple to install and maintain Junction box pre-wired for wall mounting Optional Extras 28mm compression cold feed & open vent/hot draw off 27" Incaloy immersion heater fitted 11" Incaloy immersion heater fitted (side entry) Air separator fitted Alternative manufacturers controls UPS 15/60 circulating pump (on 210l and 245l) Fitted 15mm bypass (15mm lock shield valve supplied loose)