5 Reasons RV Owners Are Testing Their Water – Amivra
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5 Reasons RV Owners Are Testing Their Water at Every Single Hookup

A 2-second dip. One number on the screen. 5 discoveries that changed how they think about every campground they pull into.
Testing water at campground hookup
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Testing well water with Purity Pen
01 WHAT'S IN YOUR HOOKUP WATER?

See what's actually in that campground water

Every hookup looks the same — clear water, nothing weird. But dip this pen in and a number pops up in 2 seconds.

Higher number means more dissolved stuff in your water. Lower means cleaner. Now you actually know instead of just hoping.

See your water's number →
Before and after inline filter test
02 IS YOUR FILTER ACTUALLY WORKING?

Prove your inline filter is actually working

Test before the filter — high number. Test after — it should drop way down, ideally to zero. That's a working filter.

When both numbers start looking the same, your cartridge is worn out and it's time to swap it.

Check your filter →
Two glasses at campground with different readings
03 KNOW BEFORE YOUR FAMILY DRINKS IT

Your kids don't ask if the water's safe — they just drink it

You're the one connecting the hose. You're the one filling the tank. Before anyone pours a glass or brushes their teeth, dip the pen in and check the number.

Takes two seconds. And now you're not wondering halfway through dinner if the water at this park is actually safe.

Protect your family →
Purity Pen on RV kitchen counter
04 WORKS ON MORE THAN JUST HOOKUP WATER

Test anything you're about to drink

The ice from the campground machine. The water jug you grabbed at the gas station. The creek your dog just drank from. The coffee bar at the lodge.

If it's liquid and someone's drinking it, dip the pen in. Two seconds and you know.

Test everything →
TDS scale on back of Purity Pen
05 NO APP NEEDED

Flip it over — the answer's on the back

No app, no manual, no Googling. Flip the pen over — there's a color-coded scale right on the back.

Green means you're good, yellow means it's getting up there, red means you probably don't want to drink that.

Get the pen →
THE METER BEHIND THIS TEST

Amivra Purity Pen

4x
4 readouts, one probe. TDS, EC, °C and °F. Most meters at this price give you TDS only.
<2s
Results in under 2 seconds. Titanium probe, ±2% accuracy, CE certified.
LCD
Backlit green LCD. Readable outdoors, under your RV, at the hookup — any light.
ALL
Works on everything. Hookup water, filtered, well, bottled, aquarium, pool, hydroponics.
BY THE NUMBERS
10K+
units sold
4.8
average star rating
<2s
dip to reading
4-in-1
TDS + EC + °C + °F

Test Your Water Today

1 Pen$80 $39.99
Keep in your RV. Test every hookup.SAVE 50%
2 Pens$160 $64.99
One for the RV, one for home.SAVE 60%
3 Pens$240 $72.99
RV, home, and a spare to share.SAVE 70%BEST VALUE
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Free shipping · 30-day money-back guarantee · CE certified device
Free Shipping30-Day Guarantee10,000+ CustomersCE CertifiedTrustpilot Excellent

What Purity Pen Owners Are Finding

★★★★★
"Easy to Use & Reliable"
Great product and very easy to use. I use it at work to check the quality of water from the different rooms in the different buildings.
— Juliette S.
★★★★★
"Simple, Convenient & Eye-Opening"
So simple to use. Took it with us on a family trip. Tested the water at every stop. The results we got were crazy.
— Sean W.
★★★★★
"More Confidence in My Water"
It helps me check my water quality so I feel more confident about what I'm drinking.
— Kate L.

You hook up, fill the tank, and drink it without thinking twice.

One dip tells you what's actually in it.

SHOP THE PURITY PEN →
Purity Pen$80 $39.99
SHOP NOW — 50% OFF