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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
CE Approved
Two Year Guarantee

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

£270.17 (Inc. VAT)

RRP £369.97 Save  £99

8 Available 

Grundfos Watermill Amazon Twin Impeller Positive Head Pump 2.0 BarReviews

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own review

4.8/ 5
29 reviews
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: Much quieter than my previous pump (Salamander). Great water pressure. Seems very sturdy and the plumber who fitted it said these were very reliable. Also quite a bit smaller than the Salamander pump I had before.

Cons: Quite heavy if you have to transport it anywhere (I had this delivered to work and had to lug it home on the train).

Neat, solid whole house pump. Quiet performance and great water pressure. Very happy with this, especially as managed to buy while on sale.

ID: 100013707
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: 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: Easy to install, Functions well, Looks the job!

Cons: Lack of in-built isolation valves might be enough to make someone go for an alternative unit

This pump was straightforward to install, it looks good, and functions very effectively.

Even the Grundfos packaging is well designed!

It comes with 4 push-fit 22mm flexible adapters. These don't have integral isolation valves, but this wasn't an issue for me because my installation already had adequate means of isolation and drainage.

The brass construction and continuous rating make this unit more expensive than plastic alternatives, but hopefully this will pay off in the long term.

ID: 100010717
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
4/ 5

Pros: Easy to fit

This pump was purchased to replace a Bristan HYPUMP100 which is no longer available, it is the same size and and was fitted without having to alter the pipework.

ID: 100012439
5/ 5

The pump is very strongly built and should last for years. It is very quiet in operation unlike the pump it replaced and provides a good pressure for a shower. An excellent product

ID: 100009861
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

£270.17 (Inc. VAT)

RRP £369.97 Save  £99

8 Available 

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