Suction Pool Cleaner Pump Match: GPM and Horsepower

What a suction-type cleaner is

A suction-side pool cleaner has no motor of its own. It connects to the pool's suction plumbing, at the skimmer or through a dedicated suction line, and runs entirely off the pool pump. The pump pulls water through the cleaner and into the filter, and the same flow moves the cleaner body. Listings use the words 'suction-side', 'suction-type', or 'suction cleaner' for this kind.

This differs from a pressure-side cleaner, which attaches to a return line and often needs a booster pump, and from a robotic cleaner, which carries its own motor and filter. The comparison at cleaner types and the note on pump connections explain the difference in listing terms.

Why the pump decides compatibility

Because the cleaner is powered by the pump, the pump's stated flow is the only stated power the cleaner can use. The ENERGY STAR pool pumps page notes that filtration requires only half the flow rate of running a pool cleaner. A pump chosen for ordinary filtering may therefore state a flow figure below what a suction cleaner listing asks for.

The cleaner listing states a flow requirement in gallons per hour (GPH) or gallons per minute (GPM). The pump listing states its own flow figure, often at a stated head value. Compatibility in listing terms is the cleaner's stated range and the pump's stated flow lining up. See cleaner flow requirements and pump flow rate.

Reading the cleaner listing for a flow requirement

A suction cleaner listing usually states the pool type it is for, a hose length, and a flow requirement. The flow requirement can appear as 'works with pumps from X to Y GPH', 'requires minimum X GPM', or 'for pools with up to X GPM of flow'. If the seller lists no flow figure, the requirement is not stated by the seller, and the maker's manual is the place to read it.

Some cleaner listings name the pump types they are meant to work with, such as a sand filter pump or a single-speed pump. Those words describe the seller's claim rather than a measurement. The pool type words in the listing, such as above ground or inground, are part of the same reading. See above ground versus inground cleaners.

Reading the pump listing for stated flow

The pump listing states horsepower and may state flow in GPM or GPH. The flow figure usually comes with a condition, such as a stated head value. The performance curve published by the maker, when one is available, shows flow across a range of head values and is more informative than the horsepower number for a cleaner match. Some maker pages publish sizing tools; the Hayward page, for example, offers a total dynamic head calculator.

Stated horsepower is not stated flow. Two pumps with the same stated horsepower can state different flow figures because the impeller, the volute, and the motor design differ. Matching a cleaner to a pump by horsepower alone has no basis in the listings; the flow figure is the number to compare. Read horsepower as a listing term, HP versus THP, and performance curves.

How to verify compatibility by reading

To verify, read both listings and the two manuals. On the cleaner side, find the stated flow range. On the pump side, find the stated flow at the operating point or read the maker's performance curve. If both figures are stated, compare them directly.

A dedicated suction line for a cleaner is a plumbing decision made with the maker's manual and an installer; this site does not advise on plumbing installation. Pool equipment rules vary between jurisdictions. The Pool & Hot Tub Alliance notes that codes, standards, and regulations vary between jurisdictions, so ask the local building office what applies to the pool equipment. For drain safety, see the Pool Safely page.

The steps in listing terms:

• Read the cleaner listing for a stated flow range in GPM or GPH.
• Read the pump listing for a stated flow figure.
• Read the pump's manual for the performance curve when the listing has no flow figure.
• Compare the two stated figures; the pump's stated flow should fall within the cleaner's stated range.
• If either figure is not stated, read the maker's sizing page and ask an installer.

What this guide cannot tell you

This guide compares stated details from listings. It does not measure flow, head, suction, cleaning result, or run time. It does not calculate whether a pump matches a cleaner for a specific pool, because that depends on the pool's plumbing, the filter, and the operating point of the pump.

The buyer reads the stated figures, reads the maker's manuals, and asks an installer when the pool's plumbing is a factor. For an above ground pool, see above ground pool pumps. For an inground pool, see inground pool pumps.

What to pick for your situation

Questions

Does a suction cleaner work with any pool pump?

Not by the stated details. The cleaner listing states a flow range, and the pump listing states a flow figure. Compatibility in listing terms is the pump's stated flow falling within the cleaner's stated range. If either figure is not stated, the maker's manual is the next place to read.

Is a higher stated horsepower pump always a better match?

No. Stated horsepower describes the motor, not the flow delivered to the cleaner. Read the pump's stated flow figure and the maker's performance curve.

What do GPM and GPH mean in a cleaner or pump listing?

GPM is gallons per minute and GPH is gallons per hour. Both are units of flow. The cleaner listing may state a requirement in GPM, and the pump listing may state flow in GPM or GPH.

Can a variable speed pump run a suction cleaner?

A variable speed pump listing states multiple speeds, and the maker's manual states the flow at each speed. The cleaner's stated flow range is compared with the pump's stated flow at the chosen speed setting.

Does this site calculate whether a pump matches a cleaner?

No. This site compares stated details from listings and does not calculate flow for a specific pool. The buyer compares stated figures, reads the maker's manuals, and asks an installer.