Suction-side cleaners are the most budget-friendly automatic cleaner option — and the most misunderstood. Properly set up, a Baracuda G3 or Hayward Navigator covers a standard pool floor reliably. Improperly set up, it climbs walls uselessly, gets stuck in corners, or stresses the main pump. The difference is almost always in setup, not the cleaner itself.
A suction-side cleaner connects to the pool's suction plumbing — either through a skimmer port or a dedicated cleaner port in the pool wall. The pool pump draws water through the cleaner, and this suction power drives the cleaner's movement mechanism.
Inside the cleaner body, oscillating discs or a diaphragm create a rhythmic suction pulse that moves the cleaner across the pool floor. Debris is sucked up through the cleaner, through the hose, and into the pump basket and filter — unlike pressure cleaners, there's no separate bag.
Connect to the dedicated cleaner port in the skimmer using a skimmer plate (also called a cleaning plate or bypass plate). This plate blocks skimmer surface suction and directs all suction to the cleaner. Without the plate, suction splits between the skimmer opening and the cleaner connection — the cleaner doesn't get full suction and performs poorly.
Some pools have a dedicated wall suction port for cleaners. This is the ideal connection — it provides consistent suction without competing with skimmer function.
All suction cleaners require a flow control valve (usually a small in-line valve in the hose) to limit how much suction reaches the cleaner. Too much suction and the cleaner locks to the floor, stops moving, and can't navigate. The right suction level: the cleaner should lift slightly off the floor when you pick up the hose — not glue itself to the surface.
Adjust the flow control valve until the cleaner moves at a steady, purposeful pace without sticking or "galloping." This adjustment is pool-specific and needs to be checked when the pump or filter is changed.
Measure the longest diagonal distance in the pool, then add 18–24 inches. This is the correct hose length. Sections typically come in 3-foot segments — trim the last section to achieve the correct length rather than leaving excess. Excess hose tangles; insufficient hose leaves areas of the pool uncleaned.
Most suction cleaners include or recommend hose weights — small weighted floats placed at specific intervals on the hose. These keep the hose submerged and prevent it from floating across the pool surface (where it interferes with cleaning patterns and can whip the cleaner into walls).
Too much suction. Open the flow control valve slightly. On variable speed pump pools, reduce pump speed by 100–200 RPM and retest.
The cleaner needs randomization to avoid repeating the same circuit. Check:
Suction cleaners are designed for the floor. Wall climbing is normal but shouldn't be constant. Too much time on walls usually means suction is too high — adjust flow control valve down. Also check if a worn foot pad is reducing floor traction, causing the cleaner to slide to walls instead.
Log the correct flow control valve setting per account in SplashLens. When a variable speed pump is reprogrammed or a filter is cleaned, suction changes — knowing the original setting gets the cleaner working again in seconds.
Never run a suction-side cleaner when shocking or superchlorinating. High chemical concentrations can damage rubber components rapidly. Disconnect the cleaner during treatment and wait until chlorine returns to normal before reconnecting.
| Interval | Task |
|---|---|
| After every use | Remove from pool, rinse housing and hose |
| Monthly | Inspect and clean discs/diaphragm; check hose for cracks |
| Annually | Replace disc/diaphragm set, inspect and replace worn foot pads, check all swivels |
| Every 2–3 seasons | Replace hose (cracks cause air intrusion, reducing suction) |
SplashLens keeps flow valve settings, connection type, and maintenance notes per pool — so suction cleaner adjustments are fast and documented for every tech on your route.
Open SplashLens Free →Connect the suction cleaner to the dedicated cleaner port in the skimmer (most common) or to a dedicated suction port in the pool wall if one exists. Use a skimmer plate to redirect full skimmer suction to the cleaner.
Getting stuck in corners usually indicates a failed or worn disc/flap inside the cleaner body, incorrect hose length for the pool, or a cleaner that isn't designed for your pool's shape. Adjust the flow control valve, check the flapper, and verify hose length.
If the cleaner gets stuck or the hose collapses, it can cause the pump to run dry or starved of flow — damaging the mechanical seal over time. Always use a hose weight to prevent hose floating.
The hose should reach from the skimmer to the farthest point in the pool, measured along the pool perimeter, plus 18–24 inches. Too short restricts coverage; too long causes tangling and inefficiency.