The Archergas� GC Universal Retro produces a maximum head of just over 6 meters and is the UK�s most versatile boiler spare part. As with all Archergas� circulators, it is fully ERP compliant with an impressive energy efficiency index rating of less than 0.23. It is also one of the only ERP compliant circulators in the UK that can replace old style 3 speed integrated circulators directly. The GCR15� is only suitable for integrated use in boilers. All 3 LED lights lit up means the pump is in ECO mode, however this is not recommended for use. Due to Archergas quality focused approach to manufacturing and use of high end component materials, this circulator is resistant to condensation, corrosion, high pressure and high temperatures. It also comes with a 3 year guarantee and can be used as a head replacement for a large number of integrated circulators as well as 3 speed standalones and the UPS4 GO. Specification:Part Number: GCR15Maximum Head: 6 MetersMaximum Flow Rate: 65 Litres Per MinuteMaximum System Pressure: 10 BarEnergy Efficiency Index Rating (EEI): ? 0.23CE/UKCA Approved: YesSpeed Control: 3 Fixed SpeedsProtection Class: IP44Temperature Class: TF95�CInsulation Class: FSupplied With: Rubber Washers x2Material: Cast IronColour: Royal BlueWeight: 1.6kg