How to Connect a Pool Cleaner to a Skimmer Vacuum Plate

What a skimmer vacuum plate does

A skimmer vacuum plate is a simple adapter that lets you attach a suction-side pool cleaner to your existing skimmer instead of using a dedicated suction line. The plate fits over the skimmer opening and has a port that accepts the cleaner hose. It blocks most of the skimmer mouth so the pump's suction is directed through the hose, while leaving enough flow to keep the skimmer weir and basket operating normally.

Pools without a dedicated vacuum line rely on this setup to use suction cleaners such as the Hayward or Pentair models. Because the skimmer also handles surface debris, you need to balance the cleaner flow and skimmer flow. The ENERGY STAR program notes that filtration only requires about half the flow rate of running a pool cleaner, so you will likely increase pump speed during cleaning.

Vacuum plates come in different sizes and shapes to fit round, rectangular, or convertible skimmer throats. Many are universal with an adjustable collar or a set of rubber fins. Using the correct plate prevents air from being drawn in, which can cause the pump to lose prime and the cleaner to float or bounce.

Tools and parts you need

Before you start, gather the following items: a vacuum plate matched to your skimmer throat, a length of suction cleaner hose with ends that fit the plate and the cleaner, a hose cuff or swivel adapter if required, and a pool cleaner that is designed for skimmer connection.

For above-ground pools, the skimmer opening may be smaller and often uses a threaded adapter or a dedicated plate. Intex and other above-ground brands supply their own vacuum plates that clip onto the skimmer faceplate. Check your owner's manual for the exact part number. For in-ground pools, a universal plate with a rubber gasket usually works.

You do not need tools for most plates; they snap or wedge into place. If your plate uses a threaded collar, keep the O-ring lubricated with silicone pool lubricant to prevent leaks. Have a garden hose nearby for flushing the hose before connection, though it is not strictly required.

Step by step: attaching the hose to the skimmer

Follow these steps in order to get a reliable connection and avoid air locks.

First, turn off the pump and close any valves that isolate the skimmer if you have more than one skimmer. Remove the skimmer lid and basket. Keep the basket out while you work; you only need it for debris collection after the cleaner is running.

Place the vacuum plate over the skimmer throat. Press it down so the gasket or fins seal the opening. The plate should have a large opening for the hose and a smaller opening or slots for some skimmer flow. If the plate has a directional indicator, orient it so the larger opening points toward the pool.

Attach one end of the hose to the cleaner's inlet. Many suction cleaners have a quick-connect collar that threads onto the hose or a swivel that twists on. Make sure it locks tight.

Hold the other end of the hose at the water surface and fill it with water. You can submerge the entire hose under water to fill it, or use a thumb over the end while you lower it. Air trapped in the hose will cause the pump to lose prime.

Once the hose is full of water, insert the free end into the plate's port. Push it in until it forms a tight seal. If the plate uses a threaded collar, screw it on hand-tight.

Replace the skimmer lid (with or without the basket) and turn the pump back on. Watch the hose for a few seconds; it should feel firm and not have visible air bubbles streaming back to the skimmer.

If you do not see water moving through the hose or the cleaner does not move, you may need to prime the hose by lifting the hose end above water briefly to release air, then reinserting.

• Turn off pump and isolate skimmer if possible.
• Remove skimmer lid and basket.
• Seat the vacuum plate over the skimmer throat.
• Connect hose to the cleaner first.
• Fill the hose with water before connecting.
• Insert hose into the plate port.
• Turn pump on and check for air bubbles.

Adjusting the flow for your cleaner

Once the cleaner is connected, you need to set the water flow to a level that lets it move steadily across the pool. Too little flow leaves it stuck on the floor or in one spot; too much flow causes it to climb walls quickly, suck air at the surface, or bounce around.

On single-speed pumps, use the skimmer valve or a dedicated vacuum valve to reduce or increase suction. If your pool uses a multi-port valve, you can throttle the main drain to divert more suction to the skimmer. The goal is a gentle, continuous pull.

Many suction cleaners have a built-in flow regulator or a separate inline flow gauge. For models without one, use a flow regulator to fine-tune. You can also adjust the pump's run time and speed on variable-speed pumps. ENERGY STAR certified pumps allow you to program a higher speed for cleaning and a lower speed for filtration, which saves energy while still giving the cleaner enough pull.

A good starting point is to set the pump at the same speed you would use for a manual pool vacuum. If the cleaner moves too fast, lower the speed or partially close the skimmer valve. If it barely moves, increase the speed or open the valve. Watch the cleaner for 5 to 10 minutes and make small adjustments.

Priming the hose and removing air

Air in the hose is the most common issue when connecting a suction cleaner to a skimmer. If you hear a gurgling sound or see bubbles exiting the cleaner, the pump is pulling air instead of water. This can cause the cleaner to float and the pump to lose prime.

To fix a persistent air lock, turn off the pump, disconnect the hose from the plate, and fill the hose completely with water using a garden hose. Submerge the cleaner so its inlet is underwater, then reconnect the hose to the plate while keeping the open end below the waterline. Turn the pump on immediately.

Another method is to use a hose with a check valve that prevents water from draining back when the pump is off. If your hose does not have one, you can simply keep the cleaner in the water and let the pump pull water through; the air will eventually purge after a few minutes.

If the pump loses prime and you cannot get the cleaner to start, check the skimmer weir. It should not be sucked shut by the vacuum plate. Some plates have a small opening to maintain skimmer flow and prevent the weir from blocking. Adjust the plate so that opening faces the surface.

Troubleshooting and maintenance

After the initial setup, you may still need to tune the system. If the cleaner does not climb walls, the suction is likely too low. Increase pump speed or open the valve. If it climbs walls and sticks to the tile, reduce flow. Check the cleaner's debris bag and the skimmer basket regularly; a clogged basket reduces flow and can make the cleaner wander.

Inspect the vacuum plate gasket for wear. A worn gasket lets air in, causing the pump to lose prime. Replace the gasket or use a thin layer of silicone lubricant. Also check the hose for cracks or loose connections, especially at the swivel. A damaged hose will pull air and ruin cleaning performance.

For above-ground pools, make sure the vacuum plate is designed for your skimmer size. Intex plates are sized for their own skimmers; using a generic plate may not seal properly. If your pool has a dedicated suction line, you may prefer that setup instead of a skimmer plate, as it provides more stable suction. See the guide on skimmer vs dedicated line for a comparison.

Always follow the pool manufacturer's safety standards. The PHTA publishes consensus standards for swimming pool equipment and installation, such as the standard for suction outlet fittings, which help prevent entrapment. Make sure your skimmer plate and fittings are installed per those guidelines to keep swimmers safe.

What to pick for your use

Questions

Why does my suction cleaner keep floating or bouncing?

Air is getting into the hose or the vacuum plate is not sealed. Make sure the hose is completely filled with water, the gasket is intact, and the plate fits tightly. Also check the skimmer weir; if it closes off the plate opening, air can be pulled in.

Can I use a vacuum plate with any skimmer?

No. Vacuum plates are sized for skimmer throats. Some are universal with adjustable fins, but above-ground pools often require a specific plate from the pool manufacturer. Always match the plate to your skimmer model for a proper seal.

How do I adjust the suction on a skimmer connection?

Use the pool pump's speed if it is variable, or throttle the skimmer valve and main drain valve to send more suction to the skimmer. Alternatively, install an inline flow regulator on the hose to control the amount of suction reaching the cleaner.

Do I need to run the pump on a higher speed while using a suction cleaner?

Generally yes. The ENERGY STAR program notes that pool cleaner operation requires about double the flow rate of normal filtration. If your cleaner is not moving well, increase the pump speed until you see steady movement.