Is this made by the same people as Vulcan? Is it closer to the v3000 or v5000?

Yes, Calmat and Vulcan are made in Germany by the same factory.

What is the maximum allowable distance between the two coils? As shown in the picture the distance between the two coils in my set up is 33 inches. B

As long as the majority of the cable is wrapped around the pipe, it should be effective. The minimum distance is 1-inch space between the two impulse cables. There is no maximum, technically the more the impulse cable is wrapped around the pipe, the better and more effective the treatment will be. the further the impulse cables are from each other the less surface area the cables are capable of covering the pipe.

Will the 1 1/2" setting work on pipes that are 1" or should you just use the 1" setting? Silly question, I know, but it says "up to 1 1/2" - Thanks!

It wraps more than enough in either setting.

Grounded plug? The only outlet near my water inlet is for 2-prong.

The Calmat device works with a 2-prong power adapter. The outlet near your water inlet will work well. You can also attach a standard 2-prong extension cord to the power adapter if it is not long enough to reach.

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Calmat Anti-limescale system

Product ID: 401856355

Details

Brand
Calmat
Included components
Calmat Water 2
Installation type
Freestanding
Item weight
476 g
Material
Plastic
Model name
Calmat

⚡Ultra-low 4.3W power consumption

💧Treats water hardness >59 GPG / 1000 ppm

🛠️Protects & extends appliance lifespan

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114489 kr

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Say goodbye to limescale, hello to effortless water perfection!

CLEANER GREENER HOME - Significantly cuts down on washing and cleaning agents, making your home eco-friendly and budget-wise.
ECO SMART ENERGY SAVER - Consumes a mere 4.3 watts, slashing electricity costs while boosting water system efficiency.
APPLIANCE LIFESPAN BOOSTER - Prolongs the life of your household appliances, reducing costly repairs and downtime.
TRUSTED GERMAN ENGINEERING - A legacy product since 1948, proven worldwide in over 50 countries for unmatched reliability.
EFFORTLESS HARD WATER MASTERY - Eliminates and prevents limescale across all pipe materials, safeguarding your entire home plumbing system.

The Calmat Anti-limescale System is a cutting-edge water conditioner designed for residential use, effectively treating extremely hard water (over 59 GPG/1000 ppm). It eliminates existing limescale and prevents future buildup throughout your entire piping system, while consuming just 4.3 watts of power. Compatible with all pipe materials, it extends appliance lifespan, reduces maintenance costs, and lowers the need for cleaning agents. Backed by over 70 years of German engineering excellence and trusted in 50+ countries, this system restores water pressure and enhances heating efficiency for a smarter, cleaner home.

Specifications

ASIN	B07961CKS2
Brand	Calmat
Container Type	Bottle
Customer Reviews	4.1 4.1 out of 5 stars (137)
Global Trade Identification Number	04260132981097
Included Components	Calmat Water treatment system, 2 Impulse cables, power adapter, plastic ties, manual, warranty card
Installation Type	Freestanding
Item Type Name	Water Conditioner
Item Weight	476 g
Manufacture Year	1948
Manufacturer	Spacio Innovations Inc.
Manufacturer Part Number	1-6004-000USA
Material Type	Plastic
Model Name	Calmat
Model Number	1-6004-000USA
Other Special Features of the Product	Electric Boost Purification
Power Source	Corded Electric
Purification Method	Electric Boost
Supported Water TDS Level Maximum (PPM)	1000
Unit Count	1.0 count

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