PUMP CATEGORY

Salt Water Pumps

Salt water pumps are built to handle seawater, brackish water and salt-laden liquids without corroding. Standard pumps fail quickly in these conditions because chloride attacks ordinary stainless steel, mild steel and plastic components....

Products in range 7
From £270£225 (Exc VAT)
Material 316 stainless
Warranty Model Specific
7 products
Plastica 5.0

Plastica Argonaut AV Series Swimming Pool Pump

  • High Performance / Large Pools
  • Designed for large pools & high demand systems
  • Suitable for residential & commercial use
  • Continuous duty, heavy-duty performance
  • Handles chlorine, salt and harsh conditions
£559.00 £465.83 (Exc VAT)
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Plastica 5.0

Plastica AG Series Swimming Pool Pump

  • Quiet Residential Upgrade
  • Ideal for small to mid-size residential pools
  • Ultra-quiet operation (approx. 55dB)
  • High grade stainless steel motor shaft
  • Suitable for chlorine and salt water
£399.00 £332.50 (Exc VAT)
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Why Standard Pumps Fail in Salt Water

Why Standard Pumps Fail in Salt Water

Salt water is one of the most aggressive liquids a pump will ever handle. Chloride ions break down the passive layer that protects ordinary 304 stainless steel, leading to pitting and crevice corrosion within months. Cast iron rusts, mild steel scales, and plastic impellers wear rapidly when sand and grit are present alongside the salt.

A true salt water pump is built differently. Wetted parts use materials that stay stable in chloride environments, seals are upgraded to silicon carbide or carbon ceramic, and fasteners are specified in a corrosion grade that matches the body. The result is a pump that keeps its efficiency and warranty intact in conditions that destroy a general-purpose unit.

Buying guide

More about this category.

The deeper read: what's in this range, how to pick, and when to talk to us before you buy.

Choosing the Right Type of Salt Water Pump

The right choice comes down to where the water is, how it needs to be moved, and whether mains power is available.

Submersible Salt Water Pumps
Submersible models sit fully under the water and pump it up to the discharge point. They are the standard choice for coastal flood defence, harbours, marinas, dockside drainage and any application where the pump can be lowered into the source. Most run on 230V single phase or 400V three phase mains.

The Speroni SA(M) Sea-Water Pump and the Tsurumi 80SFQ Chemical and Saltwater Pump are two of the most popular models in this category.

Engine Driven Salt Water Pumps
Where there is no mains supply, an engine driven pump is the answer. Petrol and diesel models give you full pumping capability on remote sites, beaches, fields and emergency response jobs. The Poly series handles aggressive but non-abrasive liquids, has large solids passage, and carries a 1 year warranty.

Engine driven units are not limited to marine work; they are equally at home in agriculture, horticulture and plant rooms where corrosive liquids are present.

Surface Salt Water Pumps
Surface pumps sit out of the water and draw it through a suction hose. They suit pool circulation, transfer duties and any installation where the pump cannot be submerged. The Speroni KS1100 Surface Jet Pump and the Plastica AG and Argonaut AV ranges are well established in salt water pool and light marine use.

Key Considerations When Selecting a Salt Water Pump

  • Wetted materials: Confirm the pump body, impeller, shaft and fasteners are rated for chloride exposure. Titanium and 316 stainless are the gold standard. AISI 304 alone is not enough for continuous salt water duty.
  • Seal type: Carbon ceramic or silicon carbide mechanical seals are essential. Lip seals and standard rubber seals will fail.
  • Power source: 230V is standard for domestic and light commercial use. 400V three phase is used in industrial and commercial installations. Petrol or diesel covers off-grid sites.
  • Operation: Decide whether you need manual operation, automatic float switch control, or pressure-controlled start and stop.
  • Solids handling: Coastal water often carries sand, weed and grit. Check the maximum solids size the pump will pass.
  • Flow and head: Match the pump curve to your actual lift and pipe run. Salt water is slightly denser than fresh water, which marginally reduces head.

Common Applications

  • Coastal flood defence and storm response
  • Marina, harbour and dockside drainage
  • Saltwater swimming pool circulation and backwash
  • Boat yards, slipways and fish handling
  • Aquaculture, hatcheries and aquariums
  • Agriculture and horticulture in coastal locations
  • Industrial chemical and brine transfer
Common questions

Frequently asked questions.

Can a salt water pump handle other corrosive liquids?

Many can. Models like the Tsurumi 80SFQ are dual-rated for chemical and saltwater duty. Always check the chemical compatibility chart for the specific pump before use, as not every corrosive liquid behaves like salt water.

Do I need a different pump for a saltwater swimming pool?

Yes. Saltwater pool systems use chlorinator cells that produce free chlorine from the salt, so the pump still sees a salt-rich, mildly chlorinated solution. A pool pump rated for salt water, such as the Plastica AG or Argonaut AV, is the correct choice.

Not Sure Which Salt Water Pump You Need?

Start with three questions: where is the pump going to sit, what is powering it, and what is the flow and head you need? Submersible for in-water installations, surface for circulation and transfer, engine driven for off-grid.