Supply to bath shower mixer taps
www.showerdoc.com/grundfos-str2-2-0-bar-universal-twin-impeller-regenerative-shower-pump-98950220
You would need the correct flange on the hot water cylinder to stop the air problem.
The Salamander is a very small pump compared to the Grunfos, so may be a better fit for your situation.
Answered 5 years ago by Barrie Seabright
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Grundfos Str2 2.0 Bar Universal Twin Impeller Regenerative Shower Pump - 98950220
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