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3.2.3 SSP3 - Transfer Pump Station

This section details the specifications for the Transfer Pump Station serving Zone 3 of the collection network, designated as SPS3 (SSP3).

Location and Overview

Location: Western side of the lake

SSP3 Location

SSP3 Lift Well-Inside

Tank Specifications

  • Type: Concrete baffle-less septic tank (similar to Darwin Pre-Cast vertical septic tank)
  • Capacity: ~5,600 Litres (effective capacity reduced by ~1,200L as pumps suspended ~0.5m from bottom)

Pump System

Primary Pumps

  • Quantity: Two Xylem Lowara SCUBA 3SC4/05 pumps
  • Model: 3SC4/05/5 C / 3SC4/05/5 C G L20 (UK version with float)
  • Power: 0.55 kW (≈ 0.75 HP), Single-phase 230V
  • Max Head: ~45 meters
  • Flow Rate: ~70 L/min (variant dependent)
  • Outlet: 1¼" BSP Female
  • Cable: 20 meters (in L20 variant)

Pump Construction

  • Material: Stainless steel (AISI 304) body and shaft; technopolymer impellers; double mechanical seal system
  • Liquid Temp: Max 40°C
  • Installation: Vertical or horizontal, up to 17 m immersion depth
  • Notes: Versions available with or without float switch. Suitable for clean or slightly abrasive water. Internal capacitor for single-phase operation.

Documentation

Control System

Controller

  • Type: Matelec FPC-Series with visual & audible alarms
  • Features: Main electrical sub-board has visual alarm strobe

Float Switches

  • Quantity: 2 units (pump activation and high level)
  • Model: Kelco K10M
  • Specifications:
  • Voltage: 0–240V, 15A resistive
  • Type: SPDT Float Switch

  • Cable: 10 m CPE rubber

    Wiring Note

    Blue wire is common

Flow System

Inflow

Receives primary treated effluent from septic tanks at units 65-66 (via SSP4) and units 75-76 & 79-80 (via SSP5) through a 32mm blueline polyethylene pipeline.

Discharge

Pumps effluent under the lake to SPS1 (SSP1) on the eastern side. The original DN32 HDPE Blueline main (incorrect colour) has been upgraded to a 32mm Lilac poly pipe encased in a 100mm PVC pipe. Pressure test of the original main was successful. From SPS1, effluent is routed to WWTP Primary Tank 1 (PT-1).

Old SSP3 Discharge Pipe Under Unit 40

SSP3 Discharge Pipe Location

Current Status

Condition

Tank appears in good condition.

Known Issues

  • Performance: Low flow rates from pumps noted with the original pipe, likely due to length/size of discharge pipework
  • Flow Variation: Fluctuating inflow noted

Version Control

Version Date Description
1.0 2025-10-06 Initial Release
2.0 2026-06-22 Updated Zone 3 flow path to WWTP

Next Review Date: 2026-12-22