A grant is a small wort collection vessel placed between the lautering vessel and the wort kettle. Traditionally, it serves three main purposes:

1. 1. Preventing Vacuum Issues: It helps prevent a vacuum from forming in the lauter or mash/lauter tun during wort pumping. If a vacuum forms, it can seal the mash to the false bottom, causing turbid worts or stuck mashes.

   2. Monitoring Wort Clarity and Flow: It allows brewers to check wort clarity and control flow before transferring it to the boil kettle.

   3. Optimizing Lauter Tun Efficiency: In larger brewing systems with multiple lauter tun outlets, the grant helps ensure proper grain bed flow. If needed, brewers can rake or adjust the bed to improve efficiency.

Why is a Wort Grant Essential?

In a pump-driven system, pulling wort too quickly from the lauter tun can compact the grain bed. This leads to stuck runoff and inefficient lautering. The wort grant acts as a buffer, regulating the outflow from the lauter tun and the inflow to the boil kettle.

Key Benefits:

• • Gravity-Assisted Flow: Gravity gently pulls wort from the lauter tun. This reduces strain on the mash and minimizes stuck mashes.

  • Convenient Wort Sampling: Brewers can take samples from the grant at any time to measure pH and gravity. This helps avoid over-sparging.

  • Clarity Control: It allows brewers to observe wort quality. If necessary, they can pump it back to the top of the mash (Vorlauf). Once clear, it is transferred to the boil kettle.

A wort grant is a simple yet powerful tool that enhances the lautering process. It prevents vacuum formation, and allows precise wort monitoring. Whether in a small craft brewery or a large-scale system, adding a grant improves brewing efficiency, wort clarity, and beer quality.