Suction vs Pressure Cleaner Flow Requirements

What flow and pressure mean on a listing

Pool cleaner listings often show flow figures such as gallons per minute (GPM) and pressure figures such as pounds per square inch (PSI). These numbers are the seller's own statements about the water movement the cleaner needs or uses. Flow describes the volume of water moving past a point in a set time; pressure describes the force pushing that water. Both terms describe a shopping detail, not a promise of how well the cleaner will work in a specific pool.

A suction-side cleaner is driven by the draw of the pool pump, so its listing may name a minimum flow the pump must provide. A pressure-side cleaner is driven by water pushed through the return line, so its listing may name a pressure range or a booster pump. The listing's words tell you which type the seller is describing.

This site compares listings on their stated details. Flow and pressure figures are stated details, and the site does not measure or confirm them. The buyer reads the figure, reads the maker's page, and decides.

• Words you may see on a listing: gallons per minute, liters per minute, high flow, low flow, pounds per square inch, booster pump required, return line.

Suction-side cleaners and the pool pump's flow

Suction-side cleaners connect to the skimmer or a dedicated suction line and move because the pool pump draws water through them. The ENERGY STAR program explains that the pool pump recirculates water through a filter to maintain water clarity and hygiene. A suction-side cleaner listing may state a minimum flow figure, and that figure is the seller's own.

The maker's page for the cleaner usually lists the flow range the cleaner needs. The pool pump's flow depends on its horsepower and the pool's plumbing, which are stated by the pump maker. This site cannot say whether a given pump will drive a given cleaner. Read the flow figure on the listing and compare it with the pump's specifications on the maker's page.

The ENERGY STAR program notes that filtration requires only half the flow rate of running a pool cleaner, which is why pump speed matters to pool owners. That statement describes pool pump operation, not a particular cleaner model.

For an above ground pool, the pump is often smaller, and a suction-side cleaner listing may name the pool type it fits. For an inground pool, the pump may be larger and the suction line may be dedicated. These are shopping context words, not guarantees.

Pressure-side cleaners and booster pumps

Pressure-side cleaners connect to the return line and use the force of water pushed back into the pool. Some listings name a booster pump as part of the setup. The ENERGY STAR program includes pressure cleaner booster pumps among the pool pumps it covers, which tells a buyer that booster pumps are a recognized part of pool equipment.

A booster pump is a separate pump that raises water pressure for the cleaner. A listing may say "booster pump required" or name a pressure range in PSI. That is the seller's statement. If the figure is missing, the seller did not state it.

Installing a booster pump is pool equipment work. Read the maker's manual and ask a pool professional about your setup; this article is about reading listings, not installing equipment.

A return line is the fitting where filtered water flows back into the pool. A pressure-side cleaner listing may name a return line connection. The maker's page states the connection type, and the listing repeats it.

How to read the figures on a listing

A figure in a title or bullet list is the seller's own. "High flow" and "low flow" are listing words that describe the cleaner's expected water movement, not a promise of cleaning results. A title that names a flow figure is telling you what the seller chose to emphasize.

If a required flow or pressure figure is missing from the listing, check the maker's page. The listing tells you what the seller wants to say; the maker's page holds the cleaner's specifications. The Pool & Hot Tub Alliance develops national standards for pools, and its standards pages explain how the industry sets requirements for pool equipment.

Listings may also show bundle words such as "hose included" or "caddy included". Those are separate shopping details from flow and pressure.

What to check on the maker's page

The maker's page is the place to read the cleaner's stated requirements. Listings change and sellers summarize, but the maker's specification sheet names the figures the cleaner was built around. The Pool & Hot Tub Alliance's standards are nationally recognized guidelines for pool construction and maintenance, and a maker's specification sheet is the product-level version of that.

When comparing two listings, read the flow or pressure figure on each and then read each maker's page. The figure on the listing is the seller's summary; the maker's page holds the full specification.

• Minimum and maximum flow for a suction-side cleaner
• Minimum pressure for a pressure-side cleaner
• Whether a booster pump is required
• The pool pump horsepower the maker names
• The pool type and pool size the maker states for the cleaner

Choosing between suction-side and pressure-side

In shopping terms, the choice comes down to the pool's equipment and the owner's preference. A suction-side cleaner fits a pool whose pump can deliver the flow the cleaner's maker states, and it draws through the existing skimmer or suction line. A pressure-side cleaner fits a pool with a booster pump or a setup where the owner is ready for the separate pump.

For a holiday home or a pool used only in summer, the shopping question is whether the cleaner's stated flow or pressure needs match the pump that is already there. Read the listing, read the maker's page, and match the stated details.

The buying guides can help. Best Suction Pool Cleaners covers suction-side picks, Best Pool Cleaner for Inground Pool covers inground pools, and Best Pool Cleaner for Above Ground Pool covers above ground pools. For related terms, read the Learn articles on required flow rate and pump requirements.

What to pick for your situation

Questions

Does the flow figure on a listing guarantee the cleaner will work with your pump?

No. The figure is the seller's own statement. Read the maker's page for the cleaner's stated flow range and compare it with the pool pump's specifications.

Why do pressure-side cleaners need a booster pump?

Pressure-side cleaners use the force of water pushed through the return line. A booster pump raises that pressure, and some listings name one as required.

Where do you find the flow requirement for your pool?

The pool pump's flow is stated by the pump maker and depends on the pump's horsepower and the pool's plumbing. The cleaner's flow requirement is stated by the cleaner maker.

What does PSI mean on a pressure-side listing?

PSI stands for pounds per square inch, a pressure figure the seller states. The maker's page usually gives the pressure range the cleaner needs.

Can you use a suction-side cleaner with any pool pump?

The maker of the cleaner states the flow range it needs. Read that range and compare it with the pool pump's specifications before buying.