The Grundfos STN 2.0 Bar Shower Pump is WRAS certified and can be installed in domestic water pipe systems to increase water pressure in showers or basin taps, providing a more powerful and pleasant water flow, even with rain shower systems. It offers a maximum pressure of 2 bar and is a universal model suitable for both positive and negative head installations. A positive head system benefits from gravity feed, while a negative head system requires the pump to actively push water. This heavy-duty twin shower pump features brass impellers and housing for enhanced durability and performance, capable of boosting hot and cold water to single showers or multiple outlets. Its continuously rated regenerative design efficiently overcomes air pockets, making it ideal for plumbing with multiple bends. The pump includes anti-vibration feet and long-life silicon carbide seals for quiet operation. It also has built-in thermal protection to prevent overheating and 22mm push-fit connections. The Amazon 2.0 bar brass universal twin impeller shower pump is WRAS compliant, features a heavy-duty brass body and impellers with machined brass stampings, and long-life silicon carbide seals. It requires a minimum static head of 1m and is supplied with stainless steel braided hoses.