Can I put one of the coils in the cold water pipe going into the water heater, and the other coil on the hot water pipe coming out of the heater?

You will only be the descaling the hot water, not the cold. Since the cold line tease off before it hits the water heater and comes out hot. Get it

Can i wrap the cwd30 and/or cwd48 with thermal foam tape (for the winter) when installed outside?

Thank you for your question. Yes, you can use thermal foam tape or other insulation devices to protect the YARNA CWD30 or CWD48 Electronic Water Descaler. Although both units are for indoor and outdoor use, it's still an electronic device and we still need to take safety precautions. Thus it's best to still be protected from too much heat and cold.

Is there a limit of time after water is treated that the water goes back into its original state when the waters not being used?

Yes. The water will recombine. Just flow cold water for a few minutes. Hot water (with tank) is another story unless you put the device on the outlet of the hot water tank. The best place to put the device is close to the tap (outlet). Device not perfect but very good at cold water inlet into the house.

I'm planning to add this in my existing water softener that uses salt. Would you recommend it installed in the inlet or outlet of the resin tank?

Thank you for your question. If you have a salt-based water softener, our product is redundant. Salt-water softener normally removes minerals (including Calcium and Magnesium) in the water and replaces it with salt. While water descaler acts on the calcium and magnesium in the water by changing its structure so that they looses it's adherence effect and therefore won't stick anymore to any surfaces. So if you have the salt-water softener, it will defeat the purpose of having a descaler. So our recommendation is to only choose one of them and NOT have both working. Depending on what you want/need I strongly suggest installing only one of the two. If you want no minerals in the water then salt systems are the way to go. If you want to eliminate the nasty side-effects of calcium, Yarna will do that.

Brand	YARNA
Color	Multi
Material	ABS Plastic
Finish Type	Glossy
Number of Handles	1
Handle Material	ABS Plastic
Mounting Type	Pipe Mount
Included Components	Shower Head, Faucet Handle, Tub Spout, Handheld Valve, Hoses, Brackets, Mounting Hardware, Instruction Manual
Head Size	2.5 to 3 inches
Manufacturer	Guru Brands LLC
Part Number	CWD
Item Weight	1.41 pounds
Product Dimensions	1 x 1 x 1 inches
Item model number	35435
Size	CWD30 - 2" Pipe
Finish	Glossy
Power Source	Corded Electric
Voltage	48 Volts
Wattage	12 watts
Installation Method	On Pipe or On Wall
Item Package Quantity	1
Special Features	Lightweight
Usage	Indoor and Outdoor, Water Resistant
Batteries Included?	No
Batteries Required?	No

YARNA Capacitive Electronic Water Descaler Whole House Solution - No-Salt Softener System, Reduces Limescale Effects and Mineral Buildup - Model CWD230, Compatible with Pipes Up of to 2 Inches

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