--- title: CSS | Ultra Efficient | Chemical Resistant Pumps description: Crest Pumps CSS Range of cantilever sump pumps. Minimal maintenance and flexible to your spec. image: https://www.crestpumps.co.uk/hubfs/Website/Product%20Images/Vertical%20Immersible/CSS1.png --- ![biogas plant](https://www.crestpumps.co.uk/hs-fs/hubfs/Banners/biogas%20plant.webp?width=300&name=biogas%20plant.webp) CSS Range # Cantilever Corrosion Resistant Sump Pump - [Products](https://www.crestpumps.co.uk/pumps) - [Vertical Immersible Pumps](https://www.crestpumps.co.uk/pumps/vertical-immersible-pumps) - [Cantilever Corrosion Resistant Sump Pump](https://www.crestpumps.co.uk/pumps/vertical-immersible-pumps/css) Built with a cantilever shaft design, CSS pumps have no immersed bearings which allows the pump to run-dry indefinitely without damage. Bearings aren’t required at the bottom of the pump due to the oversized shaft which adds stability to prevent shaft whipping. Capacity <65m³/hr ![csscutout](https://www.crestpumps.co.uk/hs-fs/hubfs/Website/Product%20Images/Vertical%20Immersible/csscutout.jpg?width=300&name=csscutout.jpg) Head <40 metres Column Length <750mm Minimal Maintenance Total Corrosion Resistance Run Dry Capability [Download Our Datasheet](https://www.crestpumps.co.uk/hubfs/Product%20Downloads/CSS-vertical-immersible-pumps.pdf) The CSS range of vertical plastic pumps have been perfected over 40 years to combat harsh and corrosive chemicals making the CSS range ideal for applications such as sump emptying, recirculation, effluent treatment and fume scrubbers. Every plastic vertical pump in our range is designed and manufactured in the UK so we can tailor the pump to your exact requirements – whether that be a particular column length,mounting plate shape or outlet position. Usually with very little difference in price or lead time compared to a standard pump. The CSS range is available in polypropylene or PVDF for the ultimate corrosion resistance to harsh and acidic applications. O-rings are available in Viton, EPDM or Kalrez. **BUILT TO YOUR REQUIREMENTS** The vertical range are proven to stand the test of time offering solid performance constantly throughout the pumps lifetime. And because of their run dry capability, minimise both operational costs and maintenance costs whilst keeping your process running efficiently and reliably. To ensure that we supply you with a pump that will last in the harshest of environments, pumps are available in a variety of materials including polypropylene, PVC, PVDF and 316 stainless steel. Every plastic vertical pump in our range is designed and manufactured in the UK so we can tailor the pump to your exact requirements – whether that be a particular column length, mounting plate shape or outlet position. Usually with very little difference in price or lead time compared to a standard pump. **HEAVY DUTY** The CSS range of vertical plastic pumps have been perfected over 40 years to combat harsh and corrosive chemicals making the CSS range ideal for applications such as sump emptying, recirculation, effluent treatment and fume scrubbers. Built with a cantilever shaft design, CSS pumps have no immersed bearings which allows the pump to run-dry indefinitely without damage. Bearings aren’t required at the bottom of the pump due to the oversized shaft which adds stability to prevent shaft whipping. The CSS range is available in polypropylene, PVC, PVDF or 316 stainless steel for the ultimate corrosion resistance to harsh and acidic applications. O-rings are available in Viton, EPDM or Kalrez. The support column is fabricated and incorporates a double skinned, heavy duty tube arrangement making the CSS range of pumps exceptionally rugged and robust. ![chemical_plant_tint_optimized_950](https://www.crestpumps.co.uk/hs-fs/hubfs/chemical_plant_tint_optimized_950.jpg?width=300&name=chemical_plant_tint_optimized_950.jpg) ## THE CREST PUMPS LIFETIME GUARANTEE **No matter how old your pump becomes, in the unlikely scenario that you have a problem, our engineers will be on hand to diagnose the issue and help you get up and running again. That’s why, with Crest Pumps you’ll never need to worry about unplanned downtime again.   Talk to us now to discuss your chemical pump requirements or book a free site audit to see how much time and money you could save!** [Talk To Us](https://www.crestpumps.co.uk/pumps/vertical-immersible-pumps/css#talk-to-us) Reliability Redefined ## Built to outlast and outperform Upfront prices are just the beginning — energy and maintenance make up most of a pump’s lifetime cost. Our **Lifecycle Cost Calculator (LCC) **breaks it down, helping you compare different pump types and manufacturers to find the best solution for your needs. [Lifecycle Cost Calculator](https://www.crestpumps.co.uk/cost-calculator) ![CSS1](https://www.crestpumps.co.uk/hs-fs/hubfs/Website/Product%20Images/Vertical%20Immersible/CSS1.png?width=300&name=CSS1.png) ![css2](https://www.crestpumps.co.uk/hs-fs/hubfs/css2.png?width=300&name=css2.png) ![CSS-1](https://www.crestpumps.co.uk/hs-fs/hubfs/CSS-1.jpg?width=300&name=CSS-1.jpg) ![0Q8A2522-2-Edit](https://www.crestpumps.co.uk/hs-fs/hubfs/0Q8A2522-2-Edit.jpg?width=300&name=0Q8A2522-2-Edit.jpg) ![css4](https://www.crestpumps.co.uk/hs-fs/hubfs/css4.png?width=300&name=css4.png) ![css3](https://www.crestpumps.co.uk/hs-fs/hubfs/css3.png?width=300&name=css3.png) ![css2](https://www.crestpumps.co.uk/hs-fs/hubfs/css2.png?width=300&name=css2.png) ![CSS-1](https://www.crestpumps.co.uk/hs-fs/hubfs/CSS-1.jpg?width=300&name=CSS-1.jpg) ![0Q8A2522-2-Edit](https://www.crestpumps.co.uk/hs-fs/hubfs/0Q8A2522-2-Edit.jpg?width=300&name=0Q8A2522-2-Edit.jpg) ![css4](https://www.crestpumps.co.uk/hs-fs/hubfs/css4.png?width=300&name=css4.png) ![css3](https://www.crestpumps.co.uk/hs-fs/hubfs/css3.png?width=300&name=css3.png) ![css2](https://www.crestpumps.co.uk/hs-fs/hubfs/css2.png?width=300&name=css2.png) ![CSS-1](https://www.crestpumps.co.uk/hs-fs/hubfs/CSS-1.jpg?width=300&name=CSS-1.jpg) ![0Q8A2522-2-Edit](https://www.crestpumps.co.uk/hs-fs/hubfs/0Q8A2522-2-Edit.jpg?width=300&name=0Q8A2522-2-Edit.jpg) ![css4](https://www.crestpumps.co.uk/hs-fs/hubfs/css4.png?width=300&name=css4.png) ![css3](https://www.crestpumps.co.uk/hs-fs/hubfs/css3.png?width=300&name=css3.png) ![css2](https://www.crestpumps.co.uk/hs-fs/hubfs/css2.png?width=300&name=css2.png) ![CSS-1](https://www.crestpumps.co.uk/hs-fs/hubfs/CSS-1.jpg?width=300&name=CSS-1.jpg) ![0Q8A2522-2-Edit](https://www.crestpumps.co.uk/hs-fs/hubfs/0Q8A2522-2-Edit.jpg?width=300&name=0Q8A2522-2-Edit.jpg) ![css4](https://www.crestpumps.co.uk/hs-fs/hubfs/css4.png?width=300&name=css4.png) ![css3](https://www.crestpumps.co.uk/hs-fs/hubfs/css3.png?width=300&name=css3.png) ![css2](https://www.crestpumps.co.uk/hs-fs/hubfs/css2.png?width=300&name=css2.png) ![CSS-1](https://www.crestpumps.co.uk/hs-fs/hubfs/CSS-1.jpg?width=300&name=CSS-1.jpg) ![0Q8A2522-2-Edit](https://www.crestpumps.co.uk/hs-fs/hubfs/0Q8A2522-2-Edit.jpg?width=300&name=0Q8A2522-2-Edit.jpg) ![css4](https://www.crestpumps.co.uk/hs-fs/hubfs/css4.png?width=300&name=css4.png) ![css3](https://www.crestpumps.co.uk/hs-fs/hubfs/css3.png?width=300&name=css3.png) ## Technical Specification | **Model** | **SUCTION (inches)** | **DISCHARGE** **(inches)** | **SPEED (rpm)** | **RATED CAPACITY (m /hr)** | **RATED HEAD (m)** | **MAX** **CAPACITY** **(m /hr)** | **MAX** **HEAD** **(m)** | **MOTOR** **OUTPUT** **(kW)** | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | **CSS 20 ** | 1.5 | 1.25 | 2900 |  9 | 9 | 16 | 13 | 1.5 | | **CSS 30 ** | 2 | 1.5 | 2900 | 15 | 16 | 28 | 18 | 3 | | **CSS 35** | 2.5 | 2 | 2900 | 30 | 22 | 50 | 28 | 5.5 | | **CSS 40** | 2.5 | 2 | 2900 | 30 | 34 | 60 | 40 | 1.1 | ## Frequently Asked Questions What is the difference between submersible and immersible pumps?** Submersible pumps are complete units, including the motor, and the whole can be totally submerged whereas immersible pumps are mounted in vertical position with the motor above the liquid and the pump end extended below the liquid level. How does a vertical immersible pump work?** A vertical immersible pump operates with its pump end submerged in the fluid while the motor remains above the liquid level. The pump uses an impeller to draw fluid up through the pump column and discharge it at the surface. This design prevents motor exposure to harsh fluids, making it ideal for handling corrosive, abrasive, or high-temperature liquids in industries like chemical processing and wastewater treatment. What Are the Advantages of Using a Vertical Immersible Pump?** Vertical immersible pumps offer several benefits, including space-saving design, as they require a smaller footprint than horizontal pumps. They prevent motor exposure to corrosive or hazardous fluids by keeping the motor above the liquid level. These pumps also provide high efficiency and reliability, with minimal risk of leaks due to their seal-less or semi-sealed designs. Additionally, they are easy to maintain, as the motor and key components remain accessible without needing to drain the tank or sump ## Trusted By The Best ![Akzonobel2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Akzonobel2.jpg?width=142&name=Akzonobel2.jpg) ![Ballard1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Ballard1.jpg?width=142&name=Ballard1.jpg) ![biffa2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/biffa2.jpg?width=142&name=biffa2.jpg) ![Champion X1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Champion%20X1.jpg?width=142&name=Champion%20X1.jpg) ![kemira2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/kemira2.jpg?width=142&name=kemira2.jpg) ![Vynova1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Vynova1.jpg?width=142&name=Vynova1.jpg) ![Akzonobel2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Akzonobel2.jpg?width=142&name=Akzonobel2.jpg) ![Ballard1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Ballard1.jpg?width=142&name=Ballard1.jpg) ![biffa2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/biffa2.jpg?width=142&name=biffa2.jpg) ![Champion X1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Champion%20X1.jpg?width=142&name=Champion%20X1.jpg) ![kemira2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/kemira2.jpg?width=142&name=kemira2.jpg) ![Vynova1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Vynova1.jpg?width=142&name=Vynova1.jpg) ![Akzonobel2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Akzonobel2.jpg?width=142&name=Akzonobel2.jpg) ![Ballard1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Ballard1.jpg?width=142&name=Ballard1.jpg) ![biffa2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/biffa2.jpg?width=142&name=biffa2.jpg) ![Champion X1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Champion%20X1.jpg?width=142&name=Champion%20X1.jpg) ![kemira2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/kemira2.jpg?width=142&name=kemira2.jpg) ![Vynova1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Vynova1.jpg?width=142&name=Vynova1.jpg) ![Akzonobel2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Akzonobel2.jpg?width=142&name=Akzonobel2.jpg) ![Ballard1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Ballard1.jpg?width=142&name=Ballard1.jpg) ![biffa2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/biffa2.jpg?width=142&name=biffa2.jpg) ![Champion X1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Champion%20X1.jpg?width=142&name=Champion%20X1.jpg) ![kemira2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/kemira2.jpg?width=142&name=kemira2.jpg) ![Vynova1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Vynova1.jpg?width=142&name=Vynova1.jpg) ![Akzonobel2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Akzonobel2.jpg?width=142&name=Akzonobel2.jpg) ![Ballard1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Ballard1.jpg?width=142&name=Ballard1.jpg) ![biffa2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/biffa2.jpg?width=142&name=biffa2.jpg) ![Champion X1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Champion%20X1.jpg?width=142&name=Champion%20X1.jpg) ![kemira2](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/kemira2.jpg?width=142&name=kemira2.jpg) ![Vynova1](https://144022160.fs1.hubspotusercontent-eu1.net/hub/144022160/hubfs/Logos/Vynova1.jpg?width=142&name=Vynova1.jpg) ![biogas plant](https://www.crestpumps.co.uk/hs-fs/hubfs/biogas%20plant.jpg?width=300&name=biogas%20plant.jpg) ## DON’T JUST TAKE OUR WORD FOR IT *Crest have been my preferred supplier of pumps for over 30 years, and have always given me good advice, a quality product and excellent service.* GLENN WILLIAMSRoperhurst ## Talk to us Contact us today for your chemical pump solutions that will minimise downtime and maximise energy efficiency. ```json { "@context" : "https://schema.org", "@type" : "Organization", "address" : { "@type" : "PostalAddress", "addressCountry" : "United Kingdom", "addressLocality" : "New Milton", "addressRegion" : "Hampshire", "postalCode" : "BH25 5NN", "streetAddress" : "7 Queensway" }, "knowsLanguage" : "en_GB", "logo" : { "@type" : "ImageObject", "url" : "https://144022160.fs1.hubspotusercontent-eu1.net/hubfs/144022160/Branding/Crest-Pumps-Logo-Small-2025.png" }, "name" : "Crest Pumps Ltd", "url" : "https://www.crestpumps.co.uk/pumps/vertical-immersible-pumps/css" } ```