Top vs Bottom Water Intake in Robotic Pool Cleaners

What top and bottom water intake mean on a listing

A robotic pool cleaner listing may name the water intake placement among its features. Top water intake means the opening that draws water sits on the upper part of the robot, so water enters above the unit's deck. Bottom water intake means the opening sits under the robot, and water enters at the level of the pool floor. Both terms describe where the water enters the machine, not how much it draws.

Placement terms appear in the title or, more often, in the bullet list. When neither part of the listing prints the term, the placement is not stated by the seller, and the buyer moves to the maker's page. The intake placement is separate from the waterline; a listing can say floor, wall, and waterline and still remain silent about where the water enters.

Where the water enters the robot

A top intake draws from the layer of water above the robot; a bottom intake draws from the water under the unit, near the floor of the pool. The placement changes which layer of water reaches the filter first, but the term alone does not describe what happens to that water. Read the bullet list and the maker's page to see how the maker describes the intake.

The image set on a listing sometimes shows the intake opening. Compare the pictures with the maker's page before buying, because camera angles can make the placement hard to read from a photo alone.

Reading intake placement on a listing

Listings print the intake placement in different places. The title may say top water intake or bottom water intake; more often, the bullet list carries the term. If no part of the listing mentions the intake, the seller did not state it, and the buyer should not guess the placement.

When comparing 2 listings, read the intake placement together with the other stated details: cordless or battery words, wall climbing claims, filter and brush descriptions, and pool type wording. One detail does not override the others.

The related listing-word articles on this site cover neighboring terms. The wide vs narrow debris intake article, the flow rate article, and the suction listing terms article explain how sellers print those details; none of them promises that one design draws better.

What the placement does not tell you

Top and bottom intake placement describe where water enters the robot, but they do not tell you how much water the robot draws, how fine the filter is, or how the robot moves. A listing can print the placement and leave those other details unstated. The maker's page is the place to read about the intake design, the filter basket, and any parts the maker lists for replacement.

The intake placement also does not tell you the pool type or the wall climbing claim. A buyer sorts a robot by pool type first, then wall claim, then cordless or battery words, then reads the filter and intake details. This site's guides follow that order; the best robotic pool cleaner guide starts with pool type.

Intake placement next to other listed features

Intake placement is one of several stated details. A robot can be cordless, climb walls, and still carry a top or bottom intake; the placement does not replace the other features. The guides on this site compare robots on stated details, and the intake placement counts when a listing prints it.

A buyer who cares about the intake placement should still read the pool type word, the cordless word, and the wall claim. For an inground pool, the wall climbing guides show how wall claims read next to intake words. For a pool that could be inground or above ground, the both pool types guide makes the pool type the first sorting step.

What to read on the maker's page

The maker's page describes the intake design in more detail than the listing. Read the maker's manual for the water entry, the filter, and any parts the maker asks the owner to replace. The maker is the source for what the intake does with the water it draws.

If the robot has a rechargeable battery, follow the EPA guidance for used lithium-ion batteries; do not put them in household trash or recycling bins. For pool water questions, read the WHO guidelines and the maker's manual.

PHTA develops consensus standards for pools and spas; the standards pages list the documents in print, and those documents are not a substitute for the maker's manual. A buyer who wants to understand how pool standards are written can read the PHTA standards pages for the process, then return to the robot's listing.

What to pick for your situation

Questions

What is top water intake on a robotic pool cleaner?

Top water intake places the water entry above the robot's deck, so the robot draws water from the layer above it.

What is bottom water intake on a robotic pool cleaner?

Bottom water intake places the water entry under the robot, at the level of the pool floor, so the robot draws water from below it.

Is one intake placement better than the other?

The site cannot say that one is better. The two place the water entry in different spots; read the listing and ask the maker how the intake works with your pool.

Where is intake placement printed on a listing?

Sometimes in the title, usually in the bullet list. If the listing does not mention it, the seller did not state it.

Does intake placement change with cordless or wall climbing models?

No. Intake placement is one detail; cordless and wall climbing are separate details on the same listing.

Should you read the maker's page for intake placement?

Yes. The maker's manual describes the water entry in more detail than the listing; read it beside the listing before buying.