Effluent ยท Wassermann

Wassermann 4TMS 1 HP Septic Effluent Pump

A high-head effluent pump for aerobic septic

Updated October 2026

Quick verdict

A strong pick for aerobic systems.

Strength
High head for sprinklers.
Trade-off
Lesser-known brand.
Right buyer
Aerobic septic and sprinkler systems.
Horsepower
1 HP
Max flow (maker)
32 GPM
Max head / lift (maker)
207 ft
Discharge
1-1/4" FNPT
Housing
stainless steel
Voltage
115 V
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Why it matters

Aerobic septic systems pump clarified effluent to spray heads, which takes high pressure. The 4TMS is a 1 HP, 4 in submersible rated at 32 GPM and 207 ft of head, with bottom suction and a stainless intake screen.

It's stainless steel with a hermetically sealed, thermally protected motor and a built-in capacitor start, and it discharges through 1-1/4 in FNPT.

Who it's for, and who should skip it

Good fit if

  • Aerobic septic systems
  • Septic sprinklers
  • High-head effluent

Look elsewhere if

  • Raw sewage (use an ejector)
  • Clean-water sump pits

Pros and cons

Pros

  • 207 ft head
  • Bottom suction
  • Stainless

Cons

  • Lesser-known brand
  • Professional install usually
  • Clarified effluent only

Limitations to weigh

  • Sewage and grinder installations usually need a licensed plumber and a sealed, vented basin to meet code.

Specifications

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

MaterialStainless SteelRetailer
Max flow (maker)32 GPMRetailer
Max head / lift (maker)207 ftRetailer
Voltage115 VRetailer
Horsepower1 HPRetailer
Model number4TMS5.8Retailer
Discharge1-1/4" FNPTRetailer
Housingstainless steelRetailer

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Final verdict

Built for the high pressure aerobic systems need.

Where to buy

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Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

What is it for?
Moving clarified effluent from aerobic septic systems, including to sprinklers.
How much head?
Up to 207 ft, per Wassermann.