Grundfos STP-3.0 Bar Positive Twin Shower Pump 98284255 for Gravity-Fed Systems
Description
Brass twin impeller pump rated at 3 bar pressure Maximum flow rate of 52 litres per minute Boosts both hot and cold supplies simultaneously Regenerative design overcomes air pockets in pipework Anti-vibration feet and silicon carbide seals for quieter running Built-in thermal protection cuts power if motor overheats WRAS approved (No. 1612704) - safe for use with consumable water Flow and pressure switches for automatic start and stop Supplied with stainless steel braided flexible hoses and push-fit fittings For positive head gravity-fed systems only - not suitable for combi boilers 710 W rated power, 1 x 230 V / 50 Hz mains supply Net weight 8.9 kg - CE certified, made in Great Britain Manufacturer warranty: 5 years Dimensions: 225 x 145 x 271 mm Grundfos Amazon STP-3.0 B Brass Twin Shower Pump for Gravity-Fed Systems Heavy-duty brass construction built to last: The Grundfos Amazon STP-3.0 B is constructed from heavy-duty brass with precision-machined stampings and brass impellers, making it one of the most durable twin shower pumps in the Grundfos range. Its regenerative impeller design is engineered to overcome air pockets that can interrupt water flow, keeping your shower running consistently. Reliable pressure boosting for gravity-fed homes: Rated at 3 bar with a maximum head of 30 m and a flow rate of up to 52 litres per minute, this twin shower pump boosts both the hot and cold supplies simultaneously, making it suitable for single showers, multiple showers, or whole-house boosting where outlets sit below the cold-water storage tank. It is designed exclusively for positive head gravity-fed systems and must not be connected to a combi boiler or a mains-fed supply. Quiet operation with built-in motor protection: Anti-vibration feet isolate the pump from the mounting surface to reduce transmitted noise, while long-life silicon carbide seals contribute to quieter running. A built-in thermal protection circuit cuts power to the motor immediately if it overheats, protecting both the pump and your plumbing installation. WRAS approved and CE certified: The Grundfos Amazon STP-3.0 B carries WRAS approval (approval number 1612704), confirming it has passed extensive mechanical and water quality testing and is safe for use with consumable water. It also holds CE certification and meets the ISO9906:2012 3B, Model A pump performance standard. Shop the All Showers range from Heavins.ie, with delivery available across Ireland. Key Features Twin impeller brass construction - precision-machined brass stampings and brass impellers for long-term durability. Regenerative pump design - engineered to overcome air pockets and maintain consistent water flow. 3 bar rated pressure - maximum head of 30 m to suit a wide range of gravity-fed installations. 52 litres per minute flow rate - capable of supplying multiple shower outlets simultaneously. Anti-vibration feet - isolate the pump body from the surface to reduce noise transmission. Silicon carbide seals - long-life seals for quieter and more reliable operation. Built-in thermal protection - motor shuts off automatically if operating temperature is exceeded. WRAS approved (1612704) - independently tested and confirmed safe for use with consumable water. Flow and pressure switches fitted - automatic start and stop operation triggered by water demand. Liquid temperature range 5-60 °C - suitable for both hot and cold water supplies. Maximum operating pressure 6 bar - rated for typical domestic and light commercial plumbing systems. IPX2 water ingress protection - suitable for bathroom installation in accordance with regulations. Specifications Model: Grundfos Amazon STP-3.0 B Product number: 98284255 Pump type: Twin impeller regenerative shower pump Head type: Positive head (gravity-fed systems only) Rated pressure: 3 bar Maximum head: 30 m Rated head: 24.4 m Closed valve pressure: 3.4 bar Maximum flow rate: 52 litres/min (0.6 m³/h) Minimum static head required: 1 m Inlet/outlet connection: G ¾ inch Rated power (P1 max.): 710 W Voltage: 1 × 230 V / 50 Hz Rated current: 3.1 A Power cable: 1.5 m (no plug fitted) Noise level: 70 dBA (at 1 m) Liquid temperature range: 5 °C to 60 °C Ambient temperature range: 0 °C to 40 °C Maximum operating pressure: 6 bar Enclosure class: IPX2 Insulation class: F Motor type: Induction with built-in thermal protection Approvals: CE, WRAS (1612704), ISO9906:2012 3B Model A Colour: Black Net weight: 8.9 kg Dimensions (HxWxD): 225 x 145 x 271 mm Country of origin: Great Britain Manufacturer warranty: 5 years What's Included in the Box Grundfos Amazon STP-3.0 B twin shower pump 4 × 22 mm stainless steel braided flexible hoses Push-fit connections Basket strainers Anti-vibration rubber feet 1.5 m power cable (no plug fitted) Setup and Care Suitable system type: This pump is designed for positive head gravity-fed systems only, where the cold-water storage tank is situated above the pump and shower outlets. A minimum static head of 1 m between the base of