Connect the vacuum hose to the skimmer intake valve

A pool vacuum draws water through the skimmer basket opening instead of the main drain. To set this up, you need to attach your vacuum hose directly to the skimmer intake valve—a threaded port usually located on the inside wall of the skimmer basket housing, below the water line.

First, turn off your pool pump. Locate the intake valve inside the skimmer; it looks like a small threaded opening or a valve with a handle. Unscrew the cap or plug covering it. Thread the vacuum hose connector onto this valve by hand, then tighten it clockwise until snug. Do not over-tighten—you only need enough pressure to seal it. If the connector does not fit, you may need an adapter ring that matches your hose diameter (typically 1.25 inches or 1.5 inches) to the valve opening.

Key Takeaways

  • The skimmer intake valve is a threaded opening inside the skimmer basket housing where you attach the vacuum hose connector.
  • Turn off the pump before connecting or disconnecting the hose to avoid air leaks and pressure damage.
  • Hand-tighten the connector until it seals; over-tightening can crack plastic fittings.
  • Attach the vacuum head and pole to the other end of the hose, then turn the pump back on to begin vacuuming.

Attach the vacuum head and pole to the hose

Once the hose is connected to the skimmer intake valve, connect the vacuum head (the flat or curved attachment that sits on the pool floor) to the free end of the hose. Most vacuum heads have a threaded port; twist the hose connector onto it clockwise until tight.

Screw the telescoping pole into the top of the vacuum head. The pole should extend to a comfortable length—usually 6 to 12 feet, depending on your pool depth and size. Make sure all connections are hand-tight before you turn the pump back on.

Prime the hose before turning on the pump

Before you start vacuuming, the hose must be filled with water, not air. Air in the line prevents the vacuum from working and can damage the pump. To prime the hose, submerge it completely in the pool water, holding one end at the skimmer and the other end at the vacuum head. Let water fill the entire length of the hose—you will see air bubbles escape from the vacuum head opening.

Once the hose is full of water, keep the vacuum head submerged and turn on the pump. The suction should pull the vacuum head firmly to the pool floor. If the head floats or suction is weak, turn off the pump, check for air leaks at the connections, and re-prime the hose.

Turn on the pump and begin vacuuming

With the hose primed and the vacuum head on the pool floor, turn the pump to the "Filter" or "Vacuum" setting if your system has a multiport valve. Some pools use a dedicated vacuum line that runs directly to the pump; in that case, straightforward turn on the pump.

Move the vacuum head slowly across the pool floor in overlapping passes, similar to mowing a lawn. The suction will pull debris into the hose and toward the pump's filter basket. Work in straight lines or a grid pattern to avoid missing spots. Vacuuming usually takes 30 minutes to an hour for a residential pool, depending on how much debris is present.

Monitor the filter pressure during vacuuming

Watch the pressure gauge on your filter while you vacuum. The gauge shows how full the filter basket is becoming. As debris accumulates, pressure rises. When the pressure is 8 to 10 pounds per square inch (PSI) higher than the starting pressure, the filter needs cleaning.

Stop vacuuming, turn off the pump, and backwash the filter (or clean the filter basket, depending on your filter type). This removes trapped debris and restores water flow. After backwashing, turn the pump back on and resume vacuuming. Repeat this cycle until you finish the entire pool floor.

Disconnect the hose and store it properly

When you finish vacuuming, turn off the pump and wait a few seconds for the suction to stop. Unscrew the vacuum head from the hose, then unscrew the hose from the skimmer intake valve. Drain any remaining water from the hose by holding it vertically or laying it flat on the deck in the sun.

Coil the hose loosely and store it in a shaded area away from direct sunlight, which degrades vinyl over time. Replace the cap or plug on the skimmer intake valve. If you notice cracks, leaks, or stiff sections in the hose, replace it before the next use—a damaged hose reduces suction and can introduce air into the system.

Troubleshoot weak suction or air leaks

If the vacuum head does not stay on the floor or suction feels weak, air is entering the system somewhere. Check all three connection points: where the hose meets the skimmer intake valve, where the hose meets the vacuum head, and where the pole meets the vacuum head. Tighten each by hand in a clockwise direction.

If tightening does not help, turn off the pump and re-prime the hose. Sometimes a small air pocket forms during use and breaks the seal. If suction remains weak after re-priming, the filter basket may be full—backwash or clean it, then try again. If the problem persists, check that the pump is running at full speed and that no other valves in your system are partially closed.

Frequently Asked Questions

What if my skimmer does not have an intake valve?

Some older pools use a different setup. Check whether your skimmer has a separate vacuum line running to the pump, or whether you need to install an adapter kit. Your pool manual or a local pool supply store can identify your skimmer type and recommend the correct attachment method.

Can I vacuum while the pump is off?

No. The pump creates the suction that pulls debris through the hose. Without the pump running, the vacuum head will not stay on the floor and debris will not move. Always turn on the pump before you start vacuuming.

How often should I vacuum my pool?

Most pools need vacuuming once or twice a week during swimming season, depending on how much debris falls in. Pools near trees or in dusty areas may need more frequent vacuuming. If you notice visible dirt or algae on the floor, vacuum when ready.

What size hose connector do I need?

Standard residential pool hoses are 1.25 inches or 1.5 inches in diameter. Measure your hose or check the label printed on it. Bring that measurement to a pool supply store to find the correct connector for your skimmer intake valve.

Can I leave the hose connected to the skimmer when I am not vacuuming?

It is better to disconnect it. Leaving the hose attached can create stress on the valve fitting and may cause slow leaks over time. Disconnecting takes only a few seconds and extends the life of your equipment.