The WQAS series is a cutting-type (grinder/shear) submersible sewage pump: it looks like a standard submersible sewage pump, but the critical difference is a cutting mechanism built right at the suction inlet (rotating cutter + stationary cutter ring / shear plate, usually hardened alloy steel / heat-treated stainless) that shreds rags, long fibers, plastic film, wipes, and stringy debris before they enter the impeller

That makes WQAS the preferred choice when the application is notorious for clogs/entanglement-think septic tank/cesspit discharge, domestic & commercial building wastewater, basement/low-level drainage, and small municipal collection points where you can't afford a blocked line

Product structure diagram

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Sufficiently equipped all-copper core wire motor
The motor uses high-performance cold-rolled silicon steel sheets, with low temperature rise, high efficiency, sufficient power, and long service life.
Intelligent precision processing of high-precision rotor. The surface is treated for moisture-proof and rust-proof.
Intelligent precision processing for casting, running smoothly
Smooth-running ball silent bearings. High-quality bearings, running smoothly, good dust-proof effect, and long service life.
Teflon rubber mechanical seal
Stainless steel spring, high strength, good sealing, low resistance, dust-proof, long service life.

Key Features

Cut-first, pump-second logic：Inlet cutting assembly reduces long/stringy solids into smaller pieces so the hydraulic passage stays cleaner and the discharge line is less likely to rope-up or bridge Designed for dirty reality：Hydraulics typically in cast iron/ductile (options for 304/316 stainless where corrosion/life matters) ; hardened cutter edges for wear resistance Sealing & motor protection mindset：Oil-filled seal chamber with double mechanical seals (common arrangement), motor housing sealed for submerged duty; many configurations support leakage probe / thermal overload and pairing with a protection/auto control panel Flexible installation：Free-standing portable setup for pits/temporary sites, or fixed auto-coupling rail system for wet wells so maintenance can be done without man-entry Automation-friendly：Works well with float switches / level transducer for start–stop; optional guide-rail coupling keeps it serviceable in tight sumps

How It Works

The pump sits submerged in the sump/pit/tank (common guidance: keep within rated immersion depth, e.g. ≤10 m for many designs) Wastewater (with rags/fibers) enters the inlet grill; the rotating cutter plate + fixed cutter ring shears/twists the debris into smaller sections. The non-clog / semi-open impeller then moves the now "easier-to-pass" mixture through the discharge elbow into your pipework (PVC/HDPE/steel, sized to the pump outlet). Two typical deployment styles Portable (mobile)：hang/stand in septic tank / manhole / temporary trench → discharge via flexible hose (quick jobs, rentals, farms). Fixed coupling (permanent)：installed on a dual guide rail in a wet well; pump slides down onto a discharge elbow coupling; retrieve by chain/hoist without entering the pit (cleaner, safer, more "municipal/commercial").

Applications

Residential / light commercial：septic tank / cesspit effluent discharge, basement bathroom wastewater sumps, villa drainage where toilets/wipes/kitchen debris may appear.

•Hospitality & retail：small hotels, restaurants, commercial kitchens, supermarkets (food waste fibers/fats + packaging-related debris risk).

•Municipal & public：small lift stations / village collection pits / sewage pumping stations where rags & wipes cause repeat blockages.

•Construction & temporary sites：site offices, worker camps, prefab buildings needing a compact, clog-resistant wastewater lift solution.

•Agricultural / biogas：farmhouse sanitation drainage, rural biogas slurry transfer (when the solids profile suits); not meant for thick manure/slurry that needs a chopper/positive-displacement approach-pick the right tool for viscosity.

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