Grundfos Pumps

Grundfos Pumps Vertical Multistage High Pressure Series includes: CR /CRE / CRI / CRIE / CRN / CRNE / CRT Models

The CRE pump is a CR pump, motor and integrated variable frequency drive. The CRE pump is a system which is able to solve application problems and save energy.

The basic CR pump range, which can be applied in almost any industrial solution, is already in itself the broadest range available. Through our modular approach, we have made it even broader.

The basic CR pump range is available in four different materials: cast iron, two grades of stainless steel, and all-titanium. There are eleven flow sizes, capable of producing up to almost 725 psi pressure, and with a variety of shaft seals, rubber materials and supply voltages.

Pump parts which are typically vulnerable to difficult liquids or particularly demanding operating conditions can be optimized for their purpose and designed for specific requirements.

Grundfos CR-H offers optimized duty points to maximize pump efficiency and minimize internal wear. The result? Significant reduction in energy costs, maintenance effort and downtime along with increased pump life. All the benefits of the renowned Grundfos CR for an ANSI dimensional solution that will fit into your existing pump and piping footprint with no modifications (ANSI / ASME B73.1 piping dimensions).

Grundfos CM / CME pump has been created with compactness, flexibility and reliability as its central features. This horizontal multistage close-coupled pump is a compact, reliable and quiet pump designed to work in a variety of applications.

The difference between the CM and the CME pump ranges is the motor. CM pumps are fitted with mains-operated motors, whereas the motors for CME pumps have an integrated frequency converter and PID controller.

A Grundfos engineered mechanical shaft seal has been designed to eliminate industry-wide problems with shaft seals sticking where SIC-SIC seal faces are used. The solution builds on both the implementation of a rotation stop on the stationary ring and different surface finishing on both the stationary and rotating rings.

The CM and CME pumps are available in cast iron or stainless steel:
AISI 304/DIN 1.4301 stainless steel for water and non-corrosive liquids
AISI 316/DIN 1.4401 stainless steel offers

Grundfos CME Plus pumps are built on the basis of CME pumps. In addition to the features of a standard CME, the CME plus includes a pressure sensor, expansion tank, and discharge piping making it a complete package ready for constant pressure applications.

The CME Plus provides constant water pressure for a variety of domestic applications. This means that the end-user is no longer bothered by fluctuations in water pressure due to a rise or fall in demand, or from pump starts and stops. CME Plus keeps the pressure within the home up regardless of usage. The constant pressure feature provides the benefit of increased comfort.

In addition the CME Plus makes it possible to personalize the water pressure. By the touch of a button the pressure level is increased or decreased as desired.

The CME Plus incorporates a stop function ensuring that the pump automatically stops if the water demand drops to a very low level or disappears altogether. The method gives good total operating economy irrespective of the water demand, and the pump is not subjected to overheating and the subsequent risk of damage to the shaft seal.

Grundfos MTR, SPK, CRK, and MTC pumps are vertical multistage and the MTA single stage centrifugal pumps designed for pumping of cooling lubricants for machine tools, condensate transfer and similar applications. The pumps are designed to be mounted on top of tanks with the pump stack immerged in the pumped liquid. Grundfos MTR, SPK, CRK, and MTC pumps come with various pump sizes and various numbers of stages to provide the flow, the pressure and the length required. The MTR, SPK, and CRK pumps consist of two seperate main components: The motor and the pump unit. The MTC pump is close coupled and the motor and pump end cannot be seperated. The pump unit consists of optimized hydraulics, various types of connections, a motor stool, a given number of chambers and various other parts.

Grundfos Pump Stack Kits for CR, CRI, CRN and CRT multistage centrifugal pumps.

Grundfos CR Connections and FlexiClamp Connections for multistage centrifugal pumps. Includes packaged fitting sets, gaskets for flanges, replacement and optical flexiclamp and other optional connections.

Grundfos Pump CR-H Baseplate and Motor Mounting Kits for Multistage Centrifugal Pumps.

There is an array of Grundfos Pump Motors for your particular Grundfos Pumps. We offer TEFC Premium and Energy efficient footless motors and ODP energy efficient motors for CR, CRI, CRN, CRT, SPK, CRK and MTR Pumps. There are also IEEE 841 horizontal premium and severe duty motors. 1 phase and 3 phase MLE motors are also available. Thjere are also a handful of two pole explosion proof motors that are energy efficient as wella s heavy duty NEMA C-Face options and IEC 50 Hz and 60 Hz..

Grundfos CRE Plus pump is a CR pump, motor and integrated variable frequency drive. The CRE pump is a system which is able to solve application problems and save energy. The basic CR pump range, which can be applied in almost any industrial solution, is already in itself the broadest range available. Through our modular approach, we have made it even broader. The basic CR pump range is available in four different materials: cast iron, two grades of stainless steel, and all-titanium. There are eleven flow sizes, capable of producing up to almost 725 psi pressure, and with a variety of shaft seals, rubber materials and supply voltages. Pump parts which are typically vulnerable to difficult liquids or particularly demanding operating conditions can be optimized for their purpose and designed for specific requirements.

Grundfos offers a handful of pump accessories such as flange sets, victaulic connections, tri-clamp connections, pressure transmitters, flow transmitters and delta p transmitters for CME / CME multistage centrifugal pumps.

Grundfos HS range of compact, horizontal, centrifugal pumps is designed for small domestic and industrial water supply systems. In addition to this, the HS range is suitable for incorporation in specialized OEM equipment. The HS pumps are non-self-priming, single-stage, horizontal centrifugal pumps with mechanical shaft seal and close coupled pump/motor shaft. The pumps have an axial suction port and radial discharge port and are mounted on a base plate. Buna-N O-rings are standard.

Grundfos high-pressure booster modules are used for boosting, liquid transfer and circulation in systems under high static pressure. Applications include reverse osmosis in domestic water supply, hospitals, laboratories, and the chemical, electronics and metals industries. The pumps are also used for ultrafiltration in the chemical and galvanizing industries, painting workshops, and the metals and mineral industries.

Grundfos booster module accessories for 60 Hz 4", 6" and 8" models. These accessories include victaulic couplings, connecting kits for welding and terminal boxes.

Grundfos Pumps Stainless Steel Bypass Orifices for Continuous Feed Boilers

The CUE series are frequency converters for the speed control of a wide range of Grundfos pumps.

The Grundfos CUE is the latest addition to our E-solution range of speed-controlled pump systems designed for a series of applications such as industry, building services, municipal or private water supply, wastewater and irrigation. This new series of wall-mounted frequency converters with features and functions for Grundfos pumps and a special user interface offers features similar to those of the Grundfos E-pumps, which are fitted with motors with an integrated frequency converter.

With a CUE solution you can control the speed of virtually any Grundfos pump, irrespective of size, power range, and application area.

Grundfos Digital Dosing Pumps - The SMART Digital generation DDA, DDC and DDE with powerful variable-speed stepper motor brings state-of-the-art technology to perfection. Combined expert knowledge and the new patented solutions set future standards. Traditional technologies such as stroke length / stroke frequency adjustment with synchronous motor or solenoid drive become a thing of the past.

Unique flexibility with only a few variants The included click-stop mounting plate makes the new
pump more flexible. Three different positions are possible without using any additional accessories,
such as wall brackets. Service and pump exchange can now be done easily and fast just by clicking the
pump in and out of the mounting plate. The control cube on the DDA and DDC pump can be lifted and turned easily into three different positions: front, left or right.

Grundfos Dosing DDI series is well established on the dosing pump market with its combination of innovative drive technology and integrated microelectronics. Users appreciate how they can simply enter the required dosing rate in liters per hour and let the DDI handle the rest.

Compact design - DDI pumps are smaller and quieter than conventional pumps in their class, making them easy to install anywhere. Order your DDI with the control and display interface on the side or front as you wish.

Turndown ratio 1:800 - The DDI 222 AR has a turndown ratio ten times better than that of traditional equipment, allowing us to create a complete pump series with just one motor, one gearing system, and two pump head sizes. You get the precision you want every time - and need only a minimum of spare parts and storage capacity.

Full stroke length every time - The DDI series use a full stroke length every time - a feature unique to Grundfos dosing pumps. Each stroke is carefully timed to bring you even concentrations in the system and optimal priming throughout the entire operating range.

Grundfos Digital Dosing - The DME is the original Digital Dosing pump that represents a major step forward in metering pump technology. Chemical Metering, Precise and easy setting - The operator can easily install and set the pump to discharge exactly the quantity of dosing liquid required in the application. Capacity is read on the digital display in GPH, l/h, or ml/h, while icons are used to identify the operation mode. Unique technology - A microprocessor controlled variable speed brushless DC motor provides precise control of the suction and discharge strokes. This improves handling of viscous fluids and chemicals that off-gas. Rather than traditional stroke length adjustments, the DME always runs at 100 % stroke length. Feed rates are adjusted by controlling the speed of the discharge stroke with a fixed suction stroke speed, resulting in near continuous output as the pump is turned down. Processes: Dosing of biocides and chemicals, belt lubricant for conveyor equipment diverse range of acids, lyes, flocculation and coagulation agents, cationic and anionic polymers, precipitating agents and disinfectants, CIP applications. Applications: Pulp and paper industry, Textile industry, Food and beverage industry, Industrial process water and waste water treatment and Drinking water treatment.

Grundfos DMH Dosing - The preferred choice for demanding applications The Grundfos DMH range is a series of hydraulic pumps for applications demanding a high-quality pump. With its high accuracy and modern interface possibilities, the DMH is ideal for many applications in water treatment and industrial processing.

Prepared for performance and safety in extreme situations The DMH 250 series of pumps is available with PVC, PVDF, polypropylene, stainless steel and Hastelloy C wetted components. For high-pressure requirements, select from the series of stainless steel or Hastelloy C DMH 280 pumps, rated up to 2900 PSI. All models are fitted with a PTFE diaphragm, with the AMS diaphragm protection system and internal relief valve for pump protection.

Get the pump configuration you need Control the capacity manually by adjusting the stroke length from 0 to 100 %, with a +/- 1 % repeatable accuracy.

Grundfos Dosing DMX 221 and 226 - versatility through choice! The Grundfos DMX is a series of high-quality mechanically actuated diaphragm pumps suitable for many uses, such as drinking water treatment, wastewater treatment, and the pulp/paper and textile industries. This series is designed to be highly versatile, which is reflected in the wide flow range covered and the choice of dosing head sizes, materials, and accessories available. If in doubt, ask us – we will help you configure the
DMX that is best for you.

Manual or remote reliable control DMX B models feature manual stroke length adjustment for a 10:1 turndown ratio. For additional control the DMX AR features a micro-processor controller with:
• precise and automatic proportional feed
• manual stroke-frequency control
• 0(4)-20 mA or pulse control
• menu-driven display with user-friendly interface
• low-level and empty output
• remote on/off control

Choose the materials – and size – that suit you. Both the DMX 221 and 226 liquid ends are available in
PVC, PVDF, polypropylene, and stainless steel. For additional output and flexibility, the DMX 226 is available in a duplex version.

Grundfos Dosing Pump Accessories for DDA, DDC, DDE, DDI, DME, DMH, DMX & DTS Metering Pumps. Many accessories available including: Cables, Foot Valves, Adaptors, Inlays, Tubing and Connectors

Grundfos Dosing Pump Kits for DDA, DDC, DDE, DDI, DME, DMH, DMX & DTS Metering Pumps. Numerous Kits available including: Hose Kits, Injection Valve Kits, Pump Head Kits, Pump Maintenance Kits, Diaphragm Kits, Valve Kits & Install Kits

Grundfos Dosing Pumps Miscellaneous Parts for DDA, DDC, DDE, DDI, DME, DMH, DMX & DTS Metering Pumps. Includes: Controllers, Motors, Dampeners, Valves, Injection Units, Tanks, Rigid Suction Lines (RSL), Pressure Relief Valves (PRV), Foot Valves & Amplifiers

Grundfos DTS Dosing is precision work and one of the main tasks in chemical and process engineering as well as water treatment. DIGITAL DOSING pumps are delivering an optimal performance in these business fields. The selection of a dosing pump and the suitable accessories require systematic and well-conceived adjustment to all process parameters. As they are easy to install, dosing tank stations are the first choice in the matter of economic efficiency when adding liquids as coagulants, disinfectants or neutralising agents in a precise and controlled way to a process.

Dosing tank stations are intended for storing and dosing liquid chemicals. Many different configurations can be selected and applied flexibly to fulfil various dosing tasks. Due to the use of high-quality materials, dosing tank stations can be employed universally for diverse dosing liquids. The selection of materials can be adapted via the configuration.

Split-coupled End-suction pumps with NEMA standard motors & NEMA MLE motor models with ANSI flange fittings.

The N-series offers three different end-suction models: the frame-mounted NK, close-coupled NB and split-coupled NBS.

The N-series delivers industry leading efficiencies that future-proof them against government efficiency regulations. The NBS is designed to bring faster installation, greater efficiency and reliability, along with easier serviceability throughout the pump’s life. With up to a 35% smaller footprint, Lifetime Alignment Guarantee, back pull out design and a new and revolutionary hard-faced seal designed to improve reliability and reduce service costs, the NBS delivers on our promise that HVAC from Grundfos — it’s everyone’s comfort zone. The Grundfos

NBSE split-coupled, end-suction pump with integrated permanent magnet motor, drive, and control serves as the industry standard in performance, quality, and durability. These products allow for dynamic and intelligent solutions to many commercial building and industrial applications. With a selection of forty-one sizes available, the NBSE provides all the benefits of an NBS pump, enhanced by a high-efficiency permanent magnet motor and variable frequency drive, manufactured by Grundfos.

The Grundfos MLE permanent magnet motor with integrated variable frequency drive exceeds IE5 efficiency levels set by the International Electrotechnical Commission (IEC), currently the highest efficiency worldwide for electrical motors. NEMA Premium Efficient motors are equivalent to IE3, meaning these MLE motors are two levels above NEMA Premium Efficiency. The combined motor and VFD efficiency is higher than a NEMA Premium motor alone.

Applications

• Agricultural surface water
• HVAC: Air Conditioning
• HVAC: Heating
• Plumbing: Hot Water Recirculation
• Plumbing: Pressure Boosting
• District cooling
• District heating
• Irrigation
• Cooling
• Desalination
• Industrial heating
• Machining
• Process liquids transfer
• Industrial process water treatment
• Wash and clean
• Industrial wastewater treatment & reuse
• Municipal water transportation

Split-coupled End-suction pumps with NEMA standard motors and ANSI flange fittings

Applications

Installation

• No baseplate or grouting required reducing installation costs
• No alignment required between the pump and motor with our Lifetime Alignment Guarantee — eliminating laser alignment costs and reducing installation time
• Optimized, space-saving design has up to a 35% smaller footprint compared to traditional frame-mounted design pumps
• Top centerline discharge design allows for self-venting and more compact piping designs

Efficiency and Reliability

• Industry leading efficiencies you can count on, because of advanced Computational Fluid Dynamics (CFD)
• New Silicon Carbide (SiC) / Silicon Carbide (SiC) hard faced seal's robust design offers increased temperature range, better abrasives handling and longer life versus standard designs (standard on all N-Series pumps)
• Backed by our Lifetime Alignment Guarantee so you never have to worry about undue wear and tear on mechanical seals, bearings and energy losses due to misalignment
• Optimized, stainless-steel impeller design increases efficiency and reduces NPSH required
• Balanced impellers reduce noise and vibration for quiet operation and prolong seal and bearing life
• 4" and above models have a internal dual-volute design for increased efficiency, lower life-cycle costs and prolonged seal and bearing life 
• Integrally cast diffuser vane reduces turbulence

Serviceability

• Foot-mounted volute for increased pump stability
• Spacer-coupling design allows for back pull-out and easy access to mechanical seal without removing the motor or disturbing piping

SBA Clean Water Submersible Pumps

The SBA clean water submersible pump is designed for use in residential applications and especially suitable for rainwater applications and wells. When installed underground in a collection tank or well, noise is not an issue. The complete all in one plug-and- pump unit comes with an integrated control unit – eliminating the need for an external pump controller. Once installed and connected, all you need to do is switch on the pump

KEY FEATURES AND BENEFITS

• Noiseless operation: Emits no noise when submerged and is therefore a noiseless alternative to non-submersible pumps
• High reliability: Built from composite and stainless steel materials that are resistant to corrosion. The pump has a stainless-steel strainer that prevents large particles from entering the pump housing. A Grundfos float switch prevents air from entering the system because of dry running
• Integrated protection: The pump offers thermal overload protection. Built-in thermal protection immediately stops the pump if it overheats. The pump automatically restarts when it has returned to normal temperature
• Floating suction strainer: The model with floating suction strainer always draws the water from just below the water surface where the water is clean and free from solid particles. The SBA features integrated dry-running protection. All pumps are available with float switches for low water stop 
• SBA pumps are available in two main variants, with or without float switch. With integrated suction strainer (1 mm mesh), or with side inlet/flexible suction hose with floating suction strainer (1 mm mesh)
• Complete all-in-one unit. It comes with an integrated control unit— eliminating the need for an external pump controller
• Plug-and-pump solution. Once installed and connected to the piping, all you need to do is switch on the pump

APPLICATIONS

1. Rainwater
2. Private wells

GRUNDFOS SCALA 1 | SCALA2

GETTING WATER ON DEMAND HAS NEVER BEEN EASIER

Grundfos SCALA1 is an all-in-one pressure boosting unit with a high-efficiency motor and hydraulics with low noise operation for domestic water supply and also light commercial applications. Built-in Bluetooth communication gives you complete control over the pump using the Grundfos GO REMOTE, also for twin pump operation. This means that installation and commissioning has never been easier. The Grundfos GO REMOTE app also lets you see alarm status and get easy pump diagnostics. You can create and email reports onsite and access hard-to-reach installations remotely from the app.

FIVE SIZE VARIANTS FOR
EVERY DOMESTIC WATER SUPPLY NEED
Designed for pressure boosting in domestic installations, use SCALA1 for pumping from a roof tank, break tank or ground tank. It is also ideal for water supply from shallow wells (less than 8 m) and for pressure boosting from city mains water.

SCALA2 is a fully integrated water booster pump providing perfect water pressure in all taps at all times—even with multiple taps and showers running at the same time. It packs pump, motor, tank, sensor, drive and non-return valve into one compact unit. And with its intelligent pump control, SCALA2 automatically adjusts performance to both inlet pressure and water consumption in the home. Thanks to a water-cooled motor, SCALA2 even offers one of the lowest noise levels of any booster on the market. SCALA2 features a built-in sensor, which constantly measures the discharge pressure. If the pressure drops below the desired level, SCALA2 boosts its operation immediately to compensate for the loss of pressure. We call it intelligent pump control and the result is perfect water pressure. SCALA2 is developed to deliver trouble-free operation and ensure a long lifetime. It is built from high-grade materials, and every pump is thoroughly tested to guarantee the best possible performance and quality.

KEY FEATURES AND BENEFITS

• Perfect water pressure: Intelligent pump control adjusts operation automatically
• Low noise: As quiet as a modern dishwasher (47 dB(A) in typical use)
• Easy selection: One variant for all residential boosting needs
• Easy installation: Compact, all-in-one solution, plug-and-pump
• Easy to operate: User-friendly control panel
• Reliable operation: Dry-running protection, anti-cycling
• Long lifetime: Quality-tested to perfection, maintenance-free
• Highly efficient with ECM motor
• Self priming and suitable for both indoor and outdoor applications

APPLICATIONS

1. Boosting from mains: increases the water pressure delivered by city mains
2. Boosting from tanks: increases water pressure from roof tanks, break tanks and ground tanks, including rainwater tanks
3. Boosting from wells: pumps water from a depth of up to 26 feet (8 meters)
4. Indoor and outdoor installation: NEMA 3

Grundfos Pump Sensors and Accessories include Direct Sensors, Differential Pressure Sensor Kits, Adapters, Industrial Vortex Flow Transmitter type VFI, Liquid Filled Pressure Gauges for MLE and MGE pumps, CIU Fieldbus Modules, GO Remotes and Motor Protection Accessories.

Grundfos CR Pump Shaft Seals and Gasket Kits for Multistage Pumps, CR, CRN, CRI, CRT models.

Miscellaneous Spare Parts & Kits for Grundfos Pumps

SP Submersible Groundwater Pumps

The Grundfos SP pumps feature superior hydraulic design in a high efficiency and corrosion resistant product. Invented in 1967, the SP pump was the first ever stainless steel submersible pump and to this day it remains the benchmark in the market.

Key Features and Benefits

• Available in 4, 6, 8 and 10 inch diameter versions for a wide range of applications
• Octagonal discharge design ensures better engagement with a pipe wrench for easier and safer attachment to the drop pipe
• Screw mounted cable guard attachment to ensure a secure fit
• Built-in check valve to minimize the risk of water hammering
• Corrosion resistant, robust stainless steel construction: 304, 316, 904L
• Wear resistance via less abrasive wear Octagonal bearings and sand flush channels that remove particles with the pumped water; sand resistance is further increased by using the bearing offering longer life in sandy environments
• Optimized hydraulics ensure increased performance and higher efficiency
• Viton and Teflon parts make the SP suitable for aggressive water conditions
• Stop ring protects the pump in case of up thrust 

APPLICATIONS

1. Water supply
2. Irrigation
3. Fountains
4. Reverse osmosis
5. Dewatering
6. Groundwater lowering

 MS and MMS Submersible Motors: Made to Match the Pump

• Canned MS motors, 4” and 6”, up to 40 HP (30kW)
• Rewindable MMS motors, 6”-10”, up to 250 HP (187 kW)
• Water-filled motors
• Overheating protection with Tempcon (MS) or Pt 100/1000 on request
• Mechanical ceramic/carbon shaft seal - SiC/SiC shaft seal optional for high sand resistance
• Warm water versions available - up to 140

Grundfos TP Direct Coupled In-Line Circulator Pumps

Grundfos TP pumps are single-stage, close-coupled in-line centrifugal pumps with mechanical shaft seal and primely for applications such as heating/cooling/district energy. The pumps are fitted with fixed speed motors.

Efficient Grundfos TP pumps deliver power where it’s needed Meet the world’s most comprehensive range of high-efficiency, vertical in-line pumps with a mechanical shaft seal. Adaptable to small and large-scale systems, TP pumps deliver the flow and pressure you need for heating, cooling and air-conditioning.

Applications

• HVAC: Air Conditioning
• HVAC: Heating
• Plumbing: Hot Water Recirculation
• District Cooling District Heating
• Drinking Water Treatment
• Irrigation
• Cooling
• Desalination
• Industrial Heating
• Municipal water transportation
• Chilled Water
• Solar
• Snow Melt Systems
• Radiant Floor Hear
• Domestic Hot Water

Grundfos TP circulator pumps are designed for circulation of liquids in heating and air-conditioning systems. Pumps with bronze pump housings are suitable for circulation in domestic hot water systems. Grundfos TP pumps are vertical single-stage in-line centrifugal pumps of the close-coupled type. The TP is highly reliable and efficient. TP pumps are electrocoated to ensure a high corrosion resistance.

Grundfos TPE Circulator Inline Pumps w/ Integrated Variable Frequency Drives

The TPE series Grundfos pump is the perfect choice when you need a single-stage, in-line solution with a state-of-the-art motor and mechanical shaft seal. TPEs are close-coupled and thus less sensitive to impurities in the pumped liquid compared to wet runner circulators. That makes the solution they are part of extra robust and reliable.

Commercial buildings and industrial solutions cover a large range of applications – each with their own individual characteristics. Whether you are specifying a heating system for an office building or an industrial cooling system for a factory, the best results are created with intelligent, robust, and energy efficient pumping solutions designed to be a perfect fit for the entire system.

Applications

• District Heating
• Heating Systems
• Cooling and Air Conditioning
• Hot Water Circulation
• Cooling Systems
• Washing and Cleaning Systems
• Industrial Systems

Grundfos Unilift Submersible Wastewater Pumps

Unilift AP12 | AP35 | AP35B | AP50 | AP50B | KP150 | KP250 | KP350

Unilift AP12 is a submersible pump designed for pumping clean, non-aggressive water and slightly dirty (grey)
wastewater. The pump can be used as a portable unit. 

Unilift AP35 is a submersible pump designed for pumping dirty water, untreated wastewater (excluding toilet discharge) and liquids containing fibers from light industry, laundries, etc. with particles up to 1.4".

Unilift AP35B is a submersible pump designed for pumping effluents (excluding toilet discharge). The pump is suitable for installation on auto coupling; this allows easy access to the pump for maintenance and other purposes.

Unilift AP50 is a submersible pump designed for pumping dirty water, untreated wastewater and liquids containing fibers from light industry, laundries, etc. with particles up to 2.0".

Unilift AP50B is a submersible pump designed for pumping effluents. The pump is suitable for installation on autocoupling allowing easy access to the pump for maintenance and other purposes.

Unilift KP is a submersible pump designed for pumping clean, non-aggressive water and slightly dirty (grey) wastewater such as domestic effluents from septic and sludge treating systems.