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Grundfos Watermill Amazon Twin Impeller Positive Head Pump 2.0 Bar


Grundfos Watermill Amazon 2.0 Bar Twin Impeller Positive Regenerative Brass Shower Pump

The Amazon Brass Pump range is undoubtedly the ‘Rolls Royce’ of Grundfos shower pumps - designed and manufactured to the highest of standards. With brass impellers and machined brass stampings, these pumps can be genuinely described as ‘Heavy Duty’ since each model offers high performance and durability. These continuously rated regenerative pumps are suited to domestic, commercial or light industrial use. Products within this range are fitted with long-life silicon carbide seals and anti-vibration feet to keep the operating noise to a minimum.

All brass pumps are supplied with stainless steel flexible hoses and are covered by a comprehensive 2 years warranty. A brass pump will transform any compatible shower system into an experience that is both invigorating and memorable.

Design & Features:

  • Twin impeller - 2.0 Bar
  • Continuously rated regenerative pump
  • Anti-vibration feet - keeping noise to a minimum
  • Long-life carbide seals - ensure reliability for years to come
  • Brass impellers and machined brass stampings
  • Supplied with stainless steel flexible hoses
  • Suitable for use with 22mm pipework

Additional Info:

  • Part Number: STP-2.0 B
  • Guarantee: 2 years
  • Installation of a Surrey flange is recommended for pumps up to 3 bar pressure

Grundfos Watermill Amazon Twin Impeller Positive Head Pump 2.0 Bar360 Image


Grundfos Watermill Amazon Twin Impeller Positive Head Pump 2.0 BarProduct Specification

Head Positive
Noise Level (dB) < 70
Impeller Twin
Outlet Pressure (Bar) 2.0
Guarantee 2 Years
Power Supply 230V
Low Voltage No
Connections 22mm
Flexible Hoses Inc Yes
Manufacturer Part Number STP-2.0 B
Boxed Weight 11kg
Grundfos Watermill Amazon Twin Impeller Positive Head Pump 2.0 BarDownloadable Documents

£258.00 (Inc. VAT)

RRP £369.97 Save  £111

22 Available 

Grundfos Watermill Amazon Twin Impeller Positive Head Pump 2.0 BarReviews

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own review

4.8/ 5
28 reviews
4/ 5

Pros: Pump very simply to fit. , Very quiet in operation.

Delivery was very timely and within days of ordering.
I picked this pump as I wanted to provide additional water supplies to 2 showers. One in the main bathroom and the other in the ensuite bathroom.

Installation instructions very clear.

I installed the pump in the airing cupboard next to the hot water cylinder, so the hot water inlet supply from the cylinder was easy to rig in 22mm copper pipe.
The cold supply came from the header tank above, via a straight run down the wall. The discharge pipes from the pump were vertically up to the loft space and over to the bathroom shower. I installed 2 off 22mm "tees" to branch off to the ensuite shower.

Cold to pump and hot and cold from pump all in 22mm speedfit piping.

This pump certainly makes a great difference to the showers as we now have "power showers" in both bathrooms.
I can most definitely recommend this to anyone seeking a similar solution to poor water flows/pressures.

ID: 100003307
5/ 5

Pros: Very quite

Cons: None at present

Old easi-boost pump broke down reviewed this pump and so relived I did as now have quiet pump needed a little bit of re pipe arranging but well worth this

ID: 100017696
5/ 5

Pros: High quality, Very quiet, Good power, Great Price

Cons: Only comes with 22mm fittings so be prepared to re-plum your pipework if you are replacing a pump with 15mm fittings.

ID: 100000479
5/ 5

Pros: Good quality and easy to fit.

Excellent Purchase

Very pleased with my purchase and with the service I received.

ID: 100010196
4/ 5


Cons: I used this product in Ireland in Dublin found it very difficult to purchase metric fittings for the pump connections and found the parts very expensive. Only complaint which is trivial.

Compact very effective pump ideal for the 2 bar shower that it was fitted to. Easy installation would use this product again

ID: 100007021
5/ 5

Pros: Quiet. Reputable brand. Solid build. Good performance.

Cons: None

Really fast service from the web purchase. Well packaged delivery. Pump is so quiet! Bigger than our old cheap pump so needed to replumb the install to fit the old pipe configuration but no doubts we made the right choice!

ID: 100012355
5/ 5

Pros: Well made, very quiet running, great shower pressure.

Cons: Not entirely sure if this was from the pump or a connection but after it was fitted, for about a week after each use there was a very slight wetness under both impellers. I checked everything was tight, subsequently it stopped and is all dry now.

I wanted to change my old 1.5 bar salamander pump serving a single shower to an uprated pump to serve two showers. Having compared the specs; reviews and prices of various pumps I decided to go for the Grundfoss watermill Amazon 2 bar pump.
I was not disappointed, I could see immediately this pump was a well engineered piece of quality kit.

ID: 100002596
5/ 5

Pros: quiet

Cons: none

Huge improvement over previous Pump.
Highly recommended esp at this price

ID: 100008914

£258.00 (Inc. VAT)

RRP £369.97 Save  £111

22 Available 

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