Grundfos STN-3.0 B

The Grundfos STN 3.0 Bar Shower Pump boasts WRAS approval. It is designed for home plumbing systems, effectively amplifying water pressure within shower units or basin faucets. This intensification in water flow is particularly satisfying for rainfall shower settings. It achieves up to 3 bar in maximum pressure.

This pump works everywhere, for "positive" or "negative" water pressure situations. In positive setups, water moves naturally because the water tank is higher than the pump, thanks to gravity. Negative setups are different; the pump must work harder because the water doesn't flow into it easily. This is because the water tank is level with or below the pump. Here, the pump must actively suction the water, rather than passively receiving flow.

Most people have their water tanks in their loft. The Grundfos STN 3.0 bar pump can lift water to higher places, like if your shower is upstairs in a loft room. It's key to set up the pump without letting air inside, which could compromise performance by undermining pressure build-up.

Its dual-impeller design enables simultaneous hot and cold water transmission. For example, it maintains a steady, forceful water stream, allowing concurrent showering and other uses, like handwashing, with no compromise in water strength. Moreover, it incorporates with anti-vibration and non-slip feet for an ultra-quiet operation.

In the UK, legal restrictions prevent the direct linking of such pumps to the central water supply. This measure avoids potential disruptions in the broader water pressure system, impacting surrounding properties.

Understanding the Functionality of the Grundfos STN 3.0 Shower Pump

The Grundfos STN 3.0 shower pump intuitively responds to water usage, activating or deactivating in reaction to perceived pressure fluctuations. It springs into action upon sensing a pressure dip when a faucet opens and ceases operation once the faucet closes and pressure equilibrium re-establishes.

Water courses into the cold water cistern, splitting off two ways: one leading to the hot water cistern for heating before reaching the pump, and one directing cold water straight to the pump. Consequently, the pump boosts the throughput, ensuring a more vigorous tap discharge.

The subsequent diagram exemplifies a positive head scenario where gravitational pull feeds the pump. A negative head scenario applies if the pump's position is parallel to or above the water storage unit's elevation.

The Grundfos STN 3.0 serves as an apt alternative for: 

• Watermill AP062W 3 bar twin Universal Brass 
• Stuart Turner Monsoon U3.0 bar Twin 
• Salamander CT FORCE 30 PU (3.0 bar Twin)