My last brew day saw the use of a new pump in the V1 brewery. I've replaced one of my Morebeer March May 809HS pumps, with a Totton GP 20/12. The principal reason behind the change was that the 809 doesn't deal with restrictions very well. Another reason was that I was looking for increased flow rate when I upgrade the brewery chiller from my counter flow chiller to the Sondex unit mentioned previously.
I actually bought a Totton GP 20/18 on E-bay but when it arrived it was a GP 20/12. I thought I'd give it a go, as it was very reasonably priced, and if it was underrated I'd sell it on. So, what do I think. Well, I'd like to replace the impeller housing as I don't like the freedom of movement the 15mm straight ports to speed fit fittings allow, preferring the rigidity 1/2" BSP threaded ports. Apart from that I was very happily surprised. The flow rate, even when restricted is more than adequate. There was some cavitation when re-circing hot liquor at 75 deg c, as the pump's rated to 85 deg c, I wasn't expecting that. There was also some 'pulsing of liquid' at low flow rates. However, I pumped boiling wort through the pump to sanitise it for the last 10 minutes of the boil and there was no cavitation or excessive noise at all. In fact, I have to say that pumping boiling liquids it was quieter that the March may. All in all, very happy with this pump.
Pictures will be inserted into the above text in time
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