Only one family of pool cleaners ever needs a booster pump: pressure-side cleaners, and not even all of them. Buy the wrong combination and you have either a cleaner that crawls around looking tired, or a booster pump with nothing useful to do. This page sorts it out per cleaner type and per Polaris model.
The short version: robotic and suction-side cleaners do not use a booster pump (our note: they run on their own power or on your filter pump's suction). Among pressure-side cleaners, Polaris lists the Vac-Sweep 280, Vac-Sweep 380 and 3900 Sport as requiring a booster pump. The Vac-Sweep 360 does not, and Polaris says it will not operate properly with one. When in doubt, the cleaner's spec sheet says "Requires Booster Pump: Yes" or "No".
By cleaner type
| Cleaner type | How it moves | Booster pump? |
|---|---|---|
| Robotic | Its own motor and power supply | No |
| Suction-side | The suction of your filter pump, through the skimmer or a suction line | No |
| Pressure-side, booster model | High-pressure water from a booster pump | Yes |
| Pressure-side, booster-less model | The return flow of your filter pump | No |
Polaris pressure cleaners, model by model
| Model | Requires booster pump? | What Polaris says |
|---|---|---|
| Vac-Sweep 280 | Yes | For in-ground pools, requires a booster pump |
| Vac-Sweep 380 | Yes | Spec sheet: "Requires Booster Pump: Yes" |
| 3900 Sport | Yes | Powered by a required booster pump |
| Vac-Sweep 360 | No | Cleans without a booster pump; designed for a dedicated return line; will not operate properly with a booster pump |
Other brands follow the same idea: the product page or manual says whether a booster is needed. Check that before you buy either part (our advice).
Why some cleaners need a booster pump
A booster-model pressure cleaner is built to run on more pressure than a filter pump alone delivers. Polaris describes its PB4-60 booster pump as supplying "high pressure water to the Polaris pool cleaner to optimize cleaner efficiency." A booster-less cleaner like the 360 is built for the normal return flow instead, and Polaris says it will not operate properly with a booster pump. How a booster pump works and is installed: what is a pool booster pump?
Before you buy a pressure cleaner
- Do you have a dedicated cleaner line? Both the 360 and booster models connect to a dedicated return line, according to Polaris. Without one, plumbing work comes first (our note).
- Booster model: you also need the booster pump, its own circuit with GFCI protection, and a timer that starts it after the filter pump and stops it before, as Polaris's PB4-60 manual describes.
- No plumbing changes wanted? A robotic cleaner needs no booster and no special line. One example: our Dolphin Nautilus CC Plus review.
Sources
Polaris model pages: Vac-Sweep 280, Vac-Sweep 380, 3900 Sport and Vac-Sweep 360; Polaris support: booster pump compatible with the Vac-Sweep 360. The cleaner-type table is our own summary. Booster pump purpose and installation: Polaris PB4-60 manual (Zodiac, H0399500 Rev F). Points marked as ours are our own advice.
Frequently asked questions
Does a Polaris 280 need a booster pump?
Yes. Polaris says the Vac-Sweep 280 requires a booster pump.
Does a Polaris 380 need a booster pump?
Yes. Its spec sheet lists "Requires Booster Pump: Yes".
Can I use a booster pump with a Polaris 360?
No. Polaris says the 360 will not operate properly with a booster pump.
Do suction cleaners need a booster pump?
No. Suction-side cleaners run on the suction of your filter pump, and robotic cleaners on their own power supply (our note).
