Elsan Fresh Water Tank Cleaner

Keep your onboard fresh water system safe, scale-free, and taste-free.

Whether you are recommissioning your boat in the spring, performing routine mid-season maintenance, or preparing for a long cruise, Elsan Fresh Water Tank Cleaner provides an easy, effective solution for maintaining fresh drinking water on board. Specially formulated without chlorine, this powerful cleaner eradicates micro-organisms, removes calcium build-up, and eliminates nasty tastes and odours from marine fresh water tanks and supply pipes.

Why Boat Owners Need Elsan Water Tank Clean

Fresh water stored in narrowboat, cruiser, yacht or even caravan water tanks can quickly develop a stale taste, unpleasant odours, and harmful biological growth. Stagnant water, warm summer air, and long periods between outings create ideal conditions for algae, bacteria, and black spot deposits to thrive inside your tank and flexible plumbing lines.

Unlike household bleach or chlorine-based treatments, Elsan Fresh Water Tank Cleaner is 100% chlorine-free. This means:

• No harsh chemical smells or chemical aftertaste in your drinking water.
• Safe for marine plumbing components: It will not damage sensitive water pump diaphragms, rubber seals, plastic pipe fittings, or stainless steel/flexible water tanks.
• Effective descaling: It actively dissolves calcium and lime deposits that clog pumps, taps, galley mixing valves, and shower heads.

Key Features & Benefits of Elsan Water Tank Clean

• Eradicates Bacteria & Algae: Eliminates micro-organisms, bio-film, and unsightly black spot inside boat fresh water tanks and hoses.
• Powerful Descaling Action: Dissolves limescale and calcium deposits to keep water pumps running smoothly and prevent valve clogs.
• Chlorine-Free Formula: Safe for your health, gentle on your boat’s plumbing, and leaves zero chemical residue or smell behind.
• Suitable for All Tank Types: Safe for use in stainless steel, flexible bladders, rigid plastic (polyethylene), and glass-reinforced plastic (GRP) boat water tanks.
• High Concentration: 1 Litre treats up to 200 Litres of fresh water storage.

How to Use Elsan Fresh Water Tank Cleaner on Your Boat

Maintaining a clean drinking water system on board takes just a few straightforward steps:

• Dose: Add 100ml of Elsan Fresh Water Tank Cleaner for every 20 litres of total water tank capacity (e.g., 500ml for a 100-litre tank).
• Fill: Fill the water tank completely with fresh water to ensure all internal surfaces and tank ceilings are coated.
• Run Through Lines: Open your galley taps, heads sink, and boat shower until the solution flows through all supply pipes, then close the taps.
• Soak: Allow the system to soak overnight (or for at least 12 hours) to give the cleaner time to dissolve limescale and lift bio-film.
• Drain & Rinse: Drain the entire system down completely. Fill with fresh water and flush through all outlets until any loose deposits are completely rinsed away.

Use Elsan Tank Clean twice a year - once during spring recommissioning after winter lay-up, and once before winterization to keep your fresh water system in peak condition year-round.