Water

Fresh, grey and black — filtration, pressure, pumps and sanitation.

Start here

Where most readers begin

  • Buying guide

    Best RV Water Filters: We Checked Every Certification Claim

    Four RV water filters, with every certification claim checked against the public NSF, WQA and IAPMO databases. Three publish nothing, and the fourth's listing could not be found.

    Updated
  • Calculator

    RV Water Tank Calculator: How Many Days Can You Stay?

    Work out how long your fresh, grey and black tanks last on your own usage — and which of the three actually ends the trip. It is almost never the one people plan around.

    Updated
  • Sizing guide

    What Micron Rating Does an RV Water Filter Need?

    5 micron for most hookups, 1 micron absolute where cysts are the worry, 0.2 for the finest protection sold — and why "lower is better" is only half true.

    Updated

Filtration & drinking water

Filters and micron ratings, when to replace them, and whether the campground supply is safe to drink.

6 guides
  • Buying guide

    Best RV Water Filters: We Checked Every Certification Claim

    Four RV water filters, with every certification claim checked against the public NSF, WQA and IAPMO databases. Three publish nothing, and the fourth's listing could not be found.

    Updated
  • Comparison

    Clearsource vs Beech Lane RV Water Filters

    The premium system has the shorter warranty and the cheaper cartridges. The budget system has the lifetime warranty and the unpublished specs. Decided on what each maker documents.

    Updated
  • Explainer

    Is Campground Water Safe to Drink?

    Usually yes at the source — the real risk is everything between the well and your tap. How campground water is regulated, where it goes wrong, and the layers that protect you.

    Updated
  • Explainer

    How Often Should You Replace Your RV Water Filter?

    Every guide gives a different number of months because months is the wrong unit. Filters are rated in gallons — here is the maths that turns capacity into your replacement schedule.

    Updated
  • Sizing guide

    What Micron Rating Does an RV Water Filter Need?

    5 micron for most hookups, 1 micron absolute where cysts are the worry, 0.2 for the finest protection sold — and why "lower is better" is only half true.

    Updated
  • Troubleshooting

    Why Does My RV Water Smell Like Rotten Eggs?

    Hot side only means the water heater — and the fix depends on which heater you have, a fork every guide skips. Both taps means the source or your tank. Diagnosis and fixes, in order.

    Updated

Tanks, pumps & hot water

How long your fresh tank lasts, what size pump you need, and how far a water heater goes.

3 guides

Other systems