Salamander Twin Impeller Shower Pumps (Hot & Cold)

You should fit a twin impeller pump when both your hot and cold supplies are low and you want them balanced, because twin impellers boost each side independently so showers and taps don't surge or run hot/cold. If you have a traditional hot water cylinder fed from a cold header tank and the cold feed is weak, a twin pump will improve shower performance across the board. If your system is served by a combi boiler that already delivers mains pressure, a twin impeller is generally unnecessary.

Positive Head pumps need a small head of water at the inlet, typically from a cold header tank above the pump, so they are perfect for gravity-fed systems; there are ten Positive Head options in this range. Universal pumps work with both positive and negative head conditions, so they're the safer choice if you're unsure or have a more modern layout; eight Universal models are available. If you know there's a header tank above the pump, a Positive Head unit often gives good value; if not, pick Universal for guaranteed compatibility.

For a modest single shower, an output around 1.5 to 1.8 bar will give a noticeable boost without overkill; several 1.5 bar models are included in our range. If you want a strong power shower or need to run multiple outlets at once, aim for over 2.0 bar, 2.6 to 3.0 bar models provide a considerable increase and are better for larger bathrooms. a 1.5 bar RP50PT suits a simple shower, while a 3.0 bar RP100TU is appropriate if you want higher flow to several fittings.

Regenerative pumps are often quieter and well suited to small-to-medium boosts and individual showers; there are twelve regenerative options in the range. Centrifugal pumps deliver higher flows and handle whole-bathroom demands more effectively, but they can be louder and are typically used where higher output is needed; six centrifugal models are available. If you want a quiet upgrade for a single shower, a regenerative 1.5–2.0 bar model is sensible; choose centrifugal when you need sustained high flow across several outlets.

Brass construction offers greater durability and long-term corrosion resistance, making it a good investment if the pump will run frequently in a family home; six brass pumps are offered. Plastic pumps are lighter and generally less expensive, suitable where cost or infrequent use is a priority; twelve plastic options appear in the range. If you expect continuous or heavy use, pick brass for longevity; if you're upgrading a secondary bathroom or holiday property, a well-specified plastic pump will often do the job.