The 5-ASP-LL is a low-level automatic pump built around a piggyback diaphragm switch and a 1/6 HP permanently lubricated PSC motor in an epoxy-coated die-cast aluminum body. Aluminum sheds heat well for a utility pump, and the oil-free motor means there is no oil to leak into your pool or tub.
Its diaphragm switch is a sealed design with no float arm to snag, which suits tight spaces like window wells and the bottom of a stock tank. An 18 foot cord and a 1 inch FNPT discharge make it easy to place and plumb. At 1,500 GPH it moves less than the 1 HP imports in this guide, but it is a smaller, more refined machine from a company with decades of experience.
The tradeoff is flow and price: you pay more for less rated volume. Ownership is simple: rinse the screen, store the pump dry and upright, and check the diaphragm switch if the pump ever fails to start. It is a tool you will still own in ten years. If you need more volume, move up to the AQUASTRONG; if you need more reach, the 5-MSP's longer cord wins. The 5-ASP-LL is the one to buy when you want a single pump that handles a dozen small jobs a year without drama.
What works
- Sealed diaphragm switch has no float arm to snag
- Aluminum body sheds heat and resists corrosion
- Oil-free permanently lubricated motor
- 18 ft cord reaches across a cellar
Watch out for
- 1,500 GPH is modest next to 1 HP imports
- Costs more than thermoplastic units
- 1 inch discharge limits big-volume work
Spec sheet
- Motor
- 1/6 HP PSC, permanently lubricated
- Max flow
- 1,500 GPH (zero lift)
- Switch
- Piggyback diaphragm, automatic
- Body
- Epoxy coated die-cast aluminum
- Discharge
- 1 inch FNPT
- Cord
- 18 ft






