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This cap has been designed to be used with a standard PET bottle thread (PCO1881). It’s particularly useful when combined with a 2 inch tri clamp to PCO1881 reducer on the end of a sight glass to enable a  CO₂ flushed, oxygen free way of dry hopping.


It comes with a Red 35 PSI (2.5 bar) PRV which can be swapped out if desired.

Please Note: PRVs are not spunding valves and should not be relied upon as such.

Red PRV (35 PSI / 2.5 bar) + PCO1881 Cap Combo

GST Included |
  • If anything about this order is not to your satisfaction, please let us know and we will do what we can to remedy it. Our main goal is to provide quality and value in everything we do - this applies to your experience as well and we take this seriously.

    • If your item is received broken or in poor condition, we will organize a replacement.

    • If you're regretting your purchase and

      • the packaging is still intact

      • the item has not been used (e.g. it is still in a "new" condition)

    send it back to us and we'll restock it without any fee, refunding your purchase minus any shipping costs.

    *Unfortunately this does not apply to brewing ingredients.

    • Due to their nature of being processed and packed fresh for each order, all ingredient sales are final.

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