{"product_id":"grundfos-stp-3-0-bar-positive-twin-brass-shower-pump-98284255","title":"Grundfos STP-3.0 Bar Positive Twin Brass Shower Pump | 98284255","description":"\u003cul\u003e\n\u003cli\u003eBrass twin impeller pump rated at 3 bar pressure\u003c\/li\u003e\n\u003cli\u003eMaximum flow rate of 52 litres per minute\u003c\/li\u003e\n\u003cli\u003eBoosts both hot and cold supplies simultaneously\u003c\/li\u003e\n\u003cli\u003eRegenerative design overcomes air pockets in pipework\u003c\/li\u003e\n\u003cli\u003eAnti-vibration feet and silicon carbide seals for quieter running\u003c\/li\u003e\n\u003cli\u003eBuilt-in thermal protection cuts power if motor overheats\u003c\/li\u003e\n\u003cli\u003eWRAS approved (No. 1612704) - safe for use with consumable water\u003c\/li\u003e\n\u003cli\u003eFlow and pressure switches for automatic start and stop\u003c\/li\u003e\n\u003cli\u003eSupplied with stainless steel braided flexible hoses and push-fit fittings\u003c\/li\u003e\n\u003cli\u003eFor positive head gravity-fed systems only - not suitable for combi boilers\u003c\/li\u003e\n\u003cli\u003e710 W rated power, 1 x 230 V \/ 50 Hz mains supply\u003c\/li\u003e\n\u003cli\u003eNet weight 8.9 kg - CE certified, made in Great Britain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer warranty:\u003c\/strong\u003e 5 years\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 225 x 145 x 271 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGrundfos Amazon STP-3.0 B Brass Twin Shower Pump for Gravity-Fed Systems\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eHeavy-duty brass construction built to last:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eReliable pressure boosting for gravity-fed homes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRated 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.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuiet operation with built-in motor protection:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnti-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.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWRAS approved and CE certified:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003cp\u003eShop the \u003ca href=\"\/collections\/all-showers-bathroom-studio\" style=\"color: #2B00FF;\"\u003eAll Showers range\u003c\/a\u003e from Heavins.ie, with delivery available across Ireland.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cp\u003e\n\u003cstrong\u003eTwin impeller brass construction\u003c\/strong\u003e - precision-machined brass stampings and brass impellers for long-term durability.\u003cbr\u003e\n\u003cstrong\u003eRegenerative pump design\u003c\/strong\u003e - engineered to overcome air pockets and maintain consistent water flow.\u003cbr\u003e\n\u003cstrong\u003e3 bar rated pressure\u003c\/strong\u003e - maximum head of 30 m to suit a wide range of gravity-fed installations.\u003cbr\u003e\n\u003cstrong\u003e52 litres per minute flow rate\u003c\/strong\u003e - capable of supplying multiple shower outlets simultaneously.\u003cbr\u003e\n\u003cstrong\u003eAnti-vibration feet\u003c\/strong\u003e - isolate the pump body from the surface to reduce noise transmission.\u003cbr\u003e\n\u003cstrong\u003eSilicon carbide seals\u003c\/strong\u003e - long-life seals for quieter and more reliable operation.\u003cbr\u003e\n\u003cstrong\u003eBuilt-in thermal protection\u003c\/strong\u003e - motor shuts off automatically if operating temperature is exceeded.\u003cbr\u003e\n\u003cstrong\u003eWRAS approved (1612704)\u003c\/strong\u003e - independently tested and confirmed safe for use with consumable water.\u003cbr\u003e\n\u003cstrong\u003eFlow and pressure switches fitted\u003c\/strong\u003e - automatic start and stop operation triggered by water demand.\u003cbr\u003e\n\u003cstrong\u003eLiquid temperature range 5-60 °C\u003c\/strong\u003e - suitable for both hot and cold water supplies.\u003cbr\u003e\n\u003cstrong\u003eMaximum operating pressure 6 bar\u003c\/strong\u003e - rated for typical domestic and light commercial plumbing systems.\u003cbr\u003e\n\u003cstrong\u003eIPX2 water ingress protection\u003c\/strong\u003e - suitable for bathroom installation in accordance with regulations.\n\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eModel: Grundfos Amazon STP-3.0 B\u003c\/li\u003e\n\u003cli\u003eProduct number: 98284255\u003c\/li\u003e\n\u003cli\u003ePump type: Twin impeller regenerative shower pump\u003c\/li\u003e\n\u003cli\u003eHead type: Positive head (gravity-fed systems only)\u003c\/li\u003e\n\u003cli\u003eRated pressure: 3 bar\u003c\/li\u003e\n\u003cli\u003eMaximum head: 30 m\u003c\/li\u003e\n\u003cli\u003eRated head: 24.4 m\u003c\/li\u003e\n\u003cli\u003eClosed valve pressure: 3.4 bar\u003c\/li\u003e\n\u003cli\u003eMaximum flow rate: 52 litres\/min (0.6 m³\/h)\u003c\/li\u003e\n\u003cli\u003eMinimum static head required: 1 m\u003c\/li\u003e\n\u003cli\u003eInlet\/outlet connection: G ¾ inch\u003c\/li\u003e\n\u003cli\u003eRated power (P1 max.): 710 W\u003c\/li\u003e\n\u003cli\u003eVoltage: 1 × 230 V \/ 50 Hz\u003c\/li\u003e\n\u003cli\u003eRated current: 3.1 A\u003c\/li\u003e\n\u003cli\u003ePower cable: 1.5 m (no plug fitted)\u003c\/li\u003e\n\u003cli\u003eNoise level: 70 dBA (at 1 m)\u003c\/li\u003e\n\u003cli\u003eLiquid temperature range: 5 °C to 60 °C\u003c\/li\u003e\n\u003cli\u003eAmbient temperature range: 0 °C to 40 °C\u003c\/li\u003e\n\u003cli\u003eMaximum operating pressure: 6 bar\u003c\/li\u003e\n\u003cli\u003eEnclosure class: IPX2\u003c\/li\u003e\n\u003cli\u003eInsulation class: F\u003c\/li\u003e\n\u003cli\u003eMotor type: Induction with built-in thermal protection\u003c\/li\u003e\n\u003cli\u003eApprovals: CE, WRAS (1612704), ISO9906:2012 3B Model A\u003c\/li\u003e\n\u003cli\u003eColour: Black\u003c\/li\u003e\n\u003cli\u003eNet weight: 8.9 kg\u003c\/li\u003e\n\u003cli\u003eDimensions (HxWxD): 225 x 145 x 271 mm\u003c\/li\u003e\n\u003cli\u003eCountry of origin: Great Britain\u003c\/li\u003e\n\u003cli\u003eManufacturer warranty: 5 years\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's Included in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGrundfos Amazon STP-3.0 B twin shower pump\u003c\/li\u003e\n\u003cli\u003e4 × 22 mm stainless steel braided flexible hoses\u003c\/li\u003e\n\u003cli\u003ePush-fit connections\u003c\/li\u003e\n\u003cli\u003eBasket strainers\u003c\/li\u003e\n\u003cli\u003eAnti-vibration rubber feet\u003c\/li\u003e\n\u003cli\u003e1.5 m power cable (no plug fitted)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSetup and Care\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable system type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis 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 the cold-water tank and the pump inlet is required for correct operation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe pump must be installed by a qualified plumber and connected to a dedicated 230 V \/ 50 Hz mains supply via a double-pole isolator switch with a minimum 3 mm contact gap. The power cable supplied does not include a plug, so a qualified electrician should terminate the connection. Mount the pump on a firm, level surface using the anti-vibration feet provided to minimise noise and vibration.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommissioning and operation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEnsure all pipework is flushed before connecting the pump, and use the basket strainers provided to protect the impellers from debris. The flow and pressure switches start and stop the pump automatically in response to water demand, so no manual switching is required during normal use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOngoing maintenance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInspect the basket strainers periodically and clean them as required to maintain flow performance. If the built-in thermal protection trips, allow the pump to cool fully before investigating the cause before restarting. For any servicing requirements, consult a qualified plumber familiar with Grundfos shower pump installations.\u003c\/p\u003e","brand":"Grundfos","offers":[{"title":"Default Title","offer_id":57725037838709,"sku":"5700311402511","price":619.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0614\/5261\/5816\/files\/heavins-grundfos-stp-3-0-bar-positive-twin-brass-shower-pump-98284255-01.jpg?v=1793810695","url":"https:\/\/www.heavins.ie\/products\/grundfos-stp-3-0-bar-positive-twin-brass-shower-pump-98284255","provider":"Heavins","version":"1.0","type":"link"}