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How does vacuum to waste work?

Published in Pool Cleaning 3 mins read

Vacuuming to waste is a pool cleaning method that bypasses your filter and removes debris directly from your pool. This is typically used for heavy debris or algae blooms. Here's how it works:

The Role of the Multiport Valve

A multiport valve is essential for vacuuming to waste. This valve, found on many pool filter systems, controls the direction of water flow. It has several settings, including "Filter," "Backwash," "Rinse," and, importantly, "Waste."

The "Waste" Setting

The "Waste" setting on the multiport valve is the key to this process. When selected, the valve redirects the water flow so that:

  1. Water is drawn from the pool through the vacuum head and hose.
  2. The water and debris bypass the filter entirely.
  3. The water and debris are then sent directly out of the waste line.

This means that everything you vacuum up is discharged, instead of being caught in the filter.

Steps to Vacuum to Waste

While the exact steps may vary slightly depending on your pool system, here's the general process:

  1. Turn off the pump: Always turn off your pool pump before changing the multiport valve setting.
  2. Attach the vacuum hose and head: Connect your vacuum hose to the vacuum head.
  3. Fill the vacuum hose with water: This prevents air from entering the system. You can do this by holding the open end of the hose against a return jet until all the air is purged.
  4. Connect the vacuum hose to the skimmer: Attach the vacuum hose to the skimmer. You may need a skimmer plate.
  5. Set the multiport valve to "Waste": Carefully turn the multiport valve to the "Waste" position.
  6. Turn on the pump: Turn the pump back on.
  7. Begin vacuuming: Vacuum the pool floor as you normally would, moving slowly and deliberately.

Important Considerations

  • Water Loss: As the reference points out, vacuuming to WASTE drains the pool, so you'll lose water as you vacuum. Keep a close eye on the water level and be prepared to refill the pool.

  • When to Use: This method is ideal for:

    • Heavy algae blooms
    • Large amounts of debris (leaves, twigs, etc.)
    • Situations where you don't want to clog your filter.

  • Alternatives: Consider using a pool cleaner with its own separate filtration system, if you want to vacuum heavy debris without losing water.

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