Vertical pump chambers

Pump chambers for housing projects and small commercial developments.

The Marsh range of vertical pump chambers incorporates systems for pumping surface water or domestic sewage to mains, septic/sewage treatment plant effluent to drainage fields/watercourses, and bespoke systems for larger domestic and industrial applications.

When discharge to mains is required, but to do so by gravity is impractical, a pump chamber system will be needed. Although available as floor-mounted units for indoor applications such as basements, the vast majority are installed outdoors at levels to suit on-site conditions and topography.

Guidance notes:

Where foul water drainage from a domestic property is to be pumped to the mains the effluent receiving chamber should be sized to contain 24-hour inflow to allow for disruption in service, the minimum daily discharge being taken as 150 litres per person per day.

For other building types the capacity of the receiving chamber should be based on the calculated daily demand of the water intake for the building, or when only a proportion of the foul sewage is to be pumped then the capacity should be based pro-rata
If the sewer is to be ‘adopted’ by a local water authority, please contact Marsh Industries as Sewers for Adoption (SFA) specification and additional local authority related criteria may apply

Operating principle

Each pump chamber contains a number of float switches linked to a control panel that automatically controls flow and levels.

In a single pump chamber there are three float switches:
Float A: Actuates the pump cycle until level drops to low level.
Float B: Low level float stops the pump.
Float C: High level alarm – positioned above the pump actuator float (min 100mm).

For twin pump chamber operation there is an additional float switch (Float D) – usually positioned 150mm above first actuator (A) – which actuates the second pump in periods of higher flow.

After each cycle the pumps alternate to extend pump life and are designed to run for a minimum of 60 seconds with no more than 15 starts per hour.

KEY

Inlet
Submersible pump
Pump guide rails/pedestal
Pump retrieval chains

5. Non-return valve

6. Isolation valve

7. Outlet

8. Access cover

Benefits

Designed to BSEN12050 for structural strength and water-tightness and to BSEN752 to comply with hydrostatic and electrical requirements
Smooth internal walls and integral pump well improves pump efficiency and eliminates ‘dead spots’ which can lead to odours and septicity
Pre-assembled pipework for fully automatic operation (pump/control equipment separate)
Heavy duty (industrial) ‘peardrop’ floats and Lowara (Xylem) pumps throughout ensure robust, reliable design and maximum efficiency of pump with minimal clogging or wear

Unique ‘keying-in’ lip to assist anchoring into concrete surround
High level alarm as standard
Variable invert depths and orientations to suit individual site conditions

Specifications

Specifications table
Model	Diameter +/-50mm	Height +/-50mm	Inlet invert	Inlet dia	Outlet invert	Outlet dia	Storage below invert	Total storage
Mini	600	1100	500	110	300	63	120	234L
Midi	600	1500	500	110	300	63	280	421L
Maxi	600	2000	500	110	300	63	421	561L
CPS1	1170	1100	500	110	300	63	470	867L
CPS2	1170	1500	700	110	300	63	780	1183L
CPS3	1170	2200	900	110	300	63	1025	1735L
CPS4	1170	2600	900	110	300	63	1340	2050L
CPS5	1958	2100	900	110	300	63	2440	3700L
CPS6	1958	3400	900	110	300	63	4000	6000L

All pump chambers are available for dirty water (DW) or sewage (SW), in single pump (SP) and twin pump (TP) configurations.Pump chambers are usually bespoke. The dimensions given on this page are for guidance only.
For precise tank sizes and configurations, please contact Marsh Industries.
All dimensions in mm.
Due to production processes, dimensions of finished units are within a tolerance of +/-2.5%.

Resources

Marsh product portfolio and specifications

PDF

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