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Polypropylene Double Diaphragm Pumps - Are the okay


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Anyone have any experience with the Polypropylene Double Diaphragm Pumps. They seem to be able to handle temps up to 212°F and mixtures that are acidic like mash. They are quite are 300% cheaper than the Stainless Steel ones so it would be nice to use these. Just not sure if they are okay for thick grain in mashes.



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That particular unit is not suitable for high proof alcohol. It is not just the casing that matters, but all of the wetted parts. Generally, I use the fluoropolymer based units for plastic at high proof.

Yeah I have a special one for the transfer of high proofs, I was just going to use this to pump mash around so nothing really higher than 10% ABV. Do you think this would be okay for that.

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