Water & tank care
Hard water, iron and corrosion: protecting your pump and pipes
Water isn’t always kind to the gear that moves it. Hard water leaves scale, high-iron water stains and clogs, and coastal salt air corrodes from the outside. None of it’s a crisis, but a little awareness makes your pump and pipes last longer.
Hard water and scale
Hard water is high in dissolved calcium and magnesium. Over time it leaves a chalky scale inside pipes, fittings, kettles and hot-water systems, gradually narrowing pipework and coating components. You’ll notice it as white crust around taps, spotty glassware, and appliances that don’t last as long. A water softener or a scale-reduction filter is the usual answer where hardness is high.
Iron in tank and bore water
Tank and especially bore water can carry dissolved iron. The tell-tale signs are orange or brown staining on fixtures and washing, a metallic taste, and over time a build-up that clogs filters and narrows pipes. An iron-removal filter sized to your iron level is the fix; a plain sediment filter alone won’t hold it back.
Coastal and salt air
Near the coast, salt in the air corrodes metal from the outside: bolts, brackets, and any exposed metal on the pump. Stainless components, keeping the pump housed, and rinsing off salt spray all help it hold up far better. Grewa pumps use a stainless steel pump body for exactly this reason.
What to look for, and what to do
- White scale around outlets, or orange staining on fixtures and washing.
- A metallic taste, or filters clogging faster than they should.
- External rust on fittings or brackets.
- Match the treatment to the problem: a softener for hardness, an iron filter for iron, good materials and rinsing for salt air. If you aren’t sure what’s in your water, a water test tells you.
Common questions
Will hard water wreck my pump?
Not quickly, but scale builds up inside plumbing and appliances over years and shortens their life. If your area has hard water, scale reduction protects the whole system, not just the pump.
My tank water stains everything orange. What’s it?
Almost certainly dissolved iron, common in bore and some tank water. A sediment filter won’t stop it; you need an iron-removal filter sized to how much iron your water carries. A water test will tell you the level.