For the seller only, please: Would you recommend this product be used to effectively descale a countertop ice machine w/a built-in water line?

Yes, this product is great for descaling water lines with mineral buildup. If the ice machine has buildup inside the waterlines this should effectively clear those lines.

Will this work for an LG front-loader washing machine? I need it to clean the pump, tub, and drain lines.

I would not trust this product on heavy buildup.

for 40G tank how much I need?

You should rig up a pump and let it circulate for about 45 mins.

What is in this besides hydrochloric acid? My tankless water heater manufacturer Rinnai seems to only recommend vinegar, no harsh chemicals.

I do not know other than what's on the label, but I have two Rinnai units and have used it on both, two times now, adn have not seen any ill effects.

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QwikProducts QwikDescaler+ (Gallon)

Product ID: 681088979

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Details

Brand
QwikProducts
Scent
Lemon
Specific Uses For Product
Water Heater
Material Feature
Biodegradable
Item Volume
3785
Net Quantity
3785.41

⚡Concentrated formula - 1 gal = 6 gal descaler

🌿Non-toxic & biodegradable

♻️Zero VOC - eco-friendly cleaning

Description

⚡ Clean smarter, not harder — the eco-friendly powerhouse your home deserves!

SAFE SUSTAINABLE - Zero volatile organic compounds (VOC) means a healthier environment for you and your family.
ECO CONSCIOUS CLEAN - Non-toxic and biodegradable formula keeps your home spotless without harming the planet.
RUST SCALE ANNIHILATOR - Effortlessly dissolves tough water scale, lime, and rust deposits for pristine surfaces.
POWER PACKED CONCENTRATION - One gallon stretches to six, maximizing value and minimizing waste.
PROFESSIONAL GRADE EFFICIENCY - Trusted by experts for fast, reliable descaling that saves time and hassle.

QwikDescaler+ is a highly concentrated, eco-friendly descaling solution that effectively removes water scale, lime, and rust deposits. Packaged in an economical gallon container that yields six gallons of ready-to-use descaler, it combines powerful cleaning with non-toxic, biodegradable ingredients and zero VOCs, making it a safe and sustainable choice for professional-grade household maintenance.

Specifications

Manufacturer	Mainstream Engineering
Item model number	QT7710
Product Dimensions	30.48 x 31.75 x 30.48 cm; 2.27 kg
ASIN	B073SBLWR7

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