How do I know whether to choose a Positive Head or a Universal pump?

Positive Head pumps, like the Salamander CT55XTRA (1.5 bar), are designed for supplies where the incoming water already has some head above the pump, a loft cistern or a mains feed that produces a small positive pressure. Universal pumps, such as the CTFORCE20SU (2.0 bar), will run both with and without that positive head, so they are the safer option if you’re unsure about your supply. If you have a gravity-fed hot or cold header tank and a clear supply head, a Positive Head model can be economical; if your system might run dry at the inlet or you want flexibility, pick Universal.

Do single impeller pumps boost both hot and cold supplies or only one?

A single impeller pump boosts only one supply, so you must fit it to whichever feed is weaker, hot or cold, to balance pressure at your mixer shower. if your cold feed is noticeably stronger than the hot, install the pump on the hot leg so the mixer receives a more even flow. If both supplies are weak, you would need a twin impeller pump instead.

What’s the practical difference between a 1.5 bar and a 2.0 bar pump for my shower?

A 1.5 bar pump (the two included in our range here include regenerative and centrifugal types) gives a small to medium boost suitable for most single-shower situations and modest mixed-flow demands, while a 2.0 bar pump (the CTFORCE20SU) supplies a stronger lift for when the weaker supply needs a more substantial equalising. If you have a single shower and only a slight pressure imbalance, 1.5 bar is usually sufficient; choose 2.0 bar when the drop is more pronounced or when you want a noticeably stronger shower spray.

How do centrifugal and regenerative pump types affect performance and which should I pick?

Regenerative pumps are compact and excel at producing good pressure for one or two outlets, making them ideal for a single shower in a family bathroom. Centrifugal pumps, like the RP55SU (1.5 bar), tend to deliver steadier flow and suit situations where you need higher continuous flow to fill a bath or supply multiple outlets. If you mainly want a stronger shower experience for one outlet, a regenerative unit often gives better pressure; for higher flow demands, go for a centrifugal model.

Does the pump construction,brass versus plastic,matter for durability or heat resistance?

Yes. Brass-constructed pumps are more durable and better at withstanding heat and long-term wear, so they’re a good choice if you expect heavy use or want longevity. Plastic-bodied models are lighter and can resist corrosion, and they often cost less, but they may not be as robust over many years. Match the material to how heavily you’ll use the pump and your budget; for a busy family bathroom, a brass option can be worth the extra outlay.

Salamander Single Impeller Pumps - Up To 2.0 Bar

If you’ve got a noticeable difference in pressure between your hot and cold water supplies at home then you may need to get a single impeller shower pump fitted. Salamander are a market leader in this field and their single impeller pumps are brilliant for boosting your hot or cold supplies. This selection is specifically for pumps with a pressure of less than 2.0 bar. This means you’ll get a small to medium boost to equal out whichever supply is weaker.

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Salamander 1.5 Bar Single Impeller Positive Head Shower Pump - CT55XTRA

4.8

13 ratings

£147.60 inc
VAT

Save £20.48 | Was £168.08

Salamander 1.5 Bar Single Centrifugal Shower Pump - RP55SU

5.0

3 ratings

£291.95 inc
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Salamander 2.0 Bar Single Impeller Universal Head Shower Pump - CTFORCE20SU

5.0

3 ratings

£370.15 inc
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Salamander 1.5 Bar Single Impeller Positive Head Shower Pump - CT55XTRA

Salamander 1.5 Bar Single Centrifugal Shower Pump - RP55SU

Salamander 2.0 Bar Single Impeller Universal Head Shower Pump - CTFORCE20SU

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