What does "positive head" mean and how do I know if it suits your home?

Positive head means the outlet you want to boost, such as a showerhead, sits lower than the outlet on your cold water storage tank (usually in the loft). If your shower or basin is below the level of that loft tank, a positive head twin impeller pump is suitable. a downstairs bathroom fed from a loft cold tank is a typical positive-head application.

How much boost (bar rating) should you choose for a single shower, a family bathroom, or multiple outlets?

Pumps under 2.0 bar give a low to medium boost, which is often fine for a single shower or small en‑suite. Pumps at 2.0 bar and above provide a stronger lift for a main family bathroom with mixer showers; 3.0 bar and higher are better if you want to run more than one outlet at once or need a really powerful flow. Match the bar rating to how many outlets you'll use simultaneously and the force of flow you want.

Why choose a twin impeller pump rather than a single impeller or another type?

A twin impeller pump boosts both your hot and cold supplies, so mixed-flow fittings such as modern mixer showers get a balanced increase in pressure. If your shower mixes hot and cold internally, twin impellers prevent one feed becoming the limiting factor. our range offers different pump technologies too,regenerative, centrifugal and peripheral,so you can match flow profile as well as impeller count.

Do the materials (brass versus plastic) make a practical difference for performance or durability?

Yes; the range includes both brass and plastic construction models, and brass tends to be more robust and corrosion‑resistant for long life, while plastic models are lighter and often more cost‑effective. if your pump sits in a cold loft or you expect heavy daily use, a brass construction can be a sensible investment. If you want a good balance of price and performance for occasional use, the plastic options are widely used and available.

Which brands or models are good choices for reliable everyday use in a family bathroom?

The selection includes trusted names such as Salamander, Stuart Turner and Grundfos, each with different strengths: Salamander offers a wide range of regenerative and centrifugal options across many bar ratings, Stuart Turner's Monsoon and Showermate lines appear for stronger household and shower pumps, and Grundfos provides established brass and performance models. Look for a model matching the bar output you need (2.0–3.0 bar for a family bathroom) and the construction you prefer; a Stuart Turner Monsoon at 2.0–3.0 bar or a Salamander 2.6 bar are typical picks for reliable family use.

Positive Head Shower Pumps (Twin Impeller)

If you’re suffering from low water pressure on both your hot and cold supplies then a twin impeller will definitely improve the situation. They boost the flow of both feeds of water to give you a more powerful water supply. It’s not all or nothing either, you can purchase pumps with a lower bar pressure (less than 2.0 bar) for a low to medium boost or something with a higher bar pressure (2.0 bar and over) for a larger boost. This selection of pumps in particular are positive head which means they’re suitable for use where your outlet (e.g showerhead) is lower than the outlet on your cold water storage tank (usually fitted in the loft).

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Grundfos STR2 1.5C Twin Impeller Positive Head Shower Pump - 98950216

4.9

16 ratings

£109.00 inc
VAT

Save £27.13 | Was £136.13

Salamander 2.0 Bar Twin Positive Head Centrifugal Shower and Bathroom Pump - RP75PT

4.9

19 ratings

£314.42 inc
VAT

Save £103.83 | Was £418.25

Stuart Turner Monsoon 3.0 Bar Twin Impeller Positive Head Shower Pump - 46416

4.9

251 ratings

More Options Available

£476.41 inc
VAT

Save £76.71 | Was £553.12

Salamander 2.0 Bar Twin Impeller Positive Head Regenerative Shower Pump - CT75XTRA

4.9

29 ratings

£179.39 inc
VAT

Salamander 2.6 Bar Twin Impeller Positive Head Shower Pump - CT80B

4.9

17 ratings

£229.20 inc
VAT

Grundfos Amazon 3.0 Bar Twin Impeller Positive Head Shower Pump - STP-3.0 B

5.0

14 ratings

£318.00 inc
VAT

Stuart Turner Monsoon 2.0 Bar Twin Impeller Positive Head Shower Pump - 46415

4.9

251 ratings

More Options Available

£424.28 inc
VAT

Stuart Turner Showermate Shower Pump 2.0 Bar Twin Positive Impeller - 47343

5.0

15 ratings

£178.80 inc
VAT

Save £13.80 | Was £192.60

Stuart Turner Showermate TP Twin Impeller Positive Head 1.5 Bar Shower Pump - 49084

4.8

33 ratings

£117.60 inc
VAT

Save £12.00 | Was £129.60

Salamander 1.5 Bar Twin Positive Head Centrifugal Shower & Bathroom Pump - RP50PT

5.0

13 ratings

£194.41 inc
VAT

Save £9.11 | Was £203.52

Salamander 3.0 Bar Twin Impeller Positive Head Shower Pump - CTFORCE30PT

5.0

11 ratings

£333.64 inc
VAT

Save £59.15 | Was £392.79

Stuart Turner Monsoon 4.0 Bar Twin Impeller Positive Head Shower Pump - 46417

4.9

251 ratings

More Options Available

£506.40 inc
VAT

Save £126.96 | Was £633.36

stuart-turner-showermate-eco-shower-pump-15-bar-twin-positive-impeller-47342

Stuart Turner Showermate Shower Pump 1.5 Bar Twin Positive Impeller - 47342

5.0

6 ratings

£136.63 inc
VAT

salamander-1.5-bar-twin-impeller-positive-head-regenerative-shower-pump-ct50xrea

Salamander 1.5 Bar Twin Impeller Positive Head Regenerative Shower Pump - CT50XTRA

4.8

50 ratings

£139.21 inc
VAT

Stuart Turner Showermate TP Twin Impeller Positive Head 2.0 Bar Shower Pump - 49085

4.9

21 ratings

£155.76 inc
VAT

Save £12.23 | Was £167.99

Salamander 1.8 Bar Twin Impeller Positive Head Shower Pump - CT60B

4.8

13 ratings

£185.05 inc
VAT

Stuart Turner 4.5 Bar Twin Impeller Positive Head Monsoon Shower Pump - 46418

4.9

251 ratings

More Options Available

£546.00 inc
VAT

Save £20.38 | Was £566.38

Stuart Turner Monsoon Twin Impeller Standard Shower Pump 1.5 Bar - 46506

4.9

251 ratings

More Options Available

£403.96 inc
VAT

Save £18.32 | Was £422.28

Salamander 3.0 Bar Twin Positive Head Centrifugal Shower and House Pump - RP100PT

4.9

19 ratings

£365.48 inc
VAT

Salamander 2.0 Bar Twin Impeller Positive Head Shower Pump - CTFORCE20PT

4.5

2 ratings

£329.99 inc
VAT

Grundfos Amazon Twin Impeller Positive Head Brass Pump 4.0 Bar - STP4.0B

£555.24 inc
VAT

Grundfos Amazon 2.0 Bar Twin Impeller Positive Head Shower Pump - STP-2.0 B

4.8

35 ratings

£392.40 inc
VAT

Salamander 1.5 Bar Twin Impeller Positive Head Shower Pump - CTFORCE15PT

5.0

4 ratings

£305.94 inc
VAT

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