Recreation
Plumbed Ballast
A permanently installed ballast system with fixed plumbing—pumps, hoses, intakes, vents, and drains—that fills and empties hard tanks or sacs automatically without manual hoses.
Plumbed Ballast is a term from limnology — the scientific study of inland waters. The detailed explanation below covers the definition, why the concept matters to lake water-quality interpretation, and how it intersects with the LakeGrade rubric. Reading Plumbed Ballast alongside the LakeGrade rubric helps make the rubric's structure intuitive — each grading parameter maps directly onto an established limnological concept.
The per-lake pages on LakeQuality always show the specific Plumbed Ballast value for that lake, so you can move from the general concept to the specific lake without leaving the site.
What It Means for Your Lake
Plumbed ballast refers to a ballast setup with permanent plumbing: dedicated pumps, hoses, through-hull intakes, vent lines, and drains that fill and empty the boat's tanks or bags at the touch of a button. This contrasts with portable bags filled by hand with a removable pump. Vent lines are a necessary part of any plumbed bag system because without them the bag will either trap air and not fill to capacity or grow larger than its compartment. Plumbed systems use either reversible (flexible-impeller) pumps that fill and drain through a single bottom port, or one-directional aerator pumps that move water at higher velocity for the fastest fill and drain times. Many factory boats offer Plug and Play (PnP) plumbed upgrades that use existing pumps to fill auxiliary bags.
Frequently Asked Questions
What is plumbed ballast?
A permanently installed ballast system with fixed plumbing—pumps, hoses, intakes, vents, and drains—that fills and empties hard tanks or sacs automatically without manual hoses.
Why does plumbed ballast matter for lake health?
Plumbed ballast refers to a ballast setup with permanent plumbing: dedicated pumps, hoses, through-hull intakes, vent lines, and drains that fill and empty the boat's tanks or bags at the touch of a button. This contrasts with portable bags filled by hand with a removable pump. Vent lines are a nece...
Related Terms
Added weight (water-filled bags or hard weights) placed in the boat to sink the hull deeper and build a bigger, more defined wake.
A rigid, molded ballast tank built below the floor of a wake boat that holds water weight without occupying storage or seating space and avoids the mildew issues of soft bags.
A soft, fillable PVC ballast bag placed in a boat's lockers or floor to add water weight for wakesurfing, named after FatSac, the original and best-known ballast-bag manufacturer.
The electric pump that moves water into and out of a boat's ballast tanks or sacs, available as reversible flexible-impeller pumps or one-directional aerator pumps.
The overflow tube on a ballast bag that lets trapped air escape so the bag fills fully and prevents it from overfilling beyond its compartment.
Source: EPA National Aquatic Resource Surveys, 2026.