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Unlike cheap filters, a good water softener like the 40278 can last two decades if maintained. Ignore it, and you will be buying a new one in 3 years.
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The Hague Model 40278 is a high-efficiency, commercial-grade water softener designed for residential or light commercial use. Unlike single-tank units, this model features a twin-tank (alternating) design, ensuring a continuous supply of soft water 24/7—even during regeneration. It is best suited for large households (4+ bathrooms) or applications with very hard water (over 15 grains per gallon) where uninterrupted softened water is critical.
If you live in zip code 40278 and you’ve read this far, you’re ready to buy. Here’s the decision tree: 40278 water softener
Avoid: Any “salt-free” conditioner (they don’t work for 40278’s hardness) and any rental program from Culligan or EcoWater (you’ll pay $50/month forever for a $600 machine).
Q: Does the 40278 remove chlorine or lead? A: No. This is a water softener, not a filter. For chlorine taste or lead, you need a reverse osmosis (RO) system under the sink, or a whole home carbon filter before the 40278. Unlike cheap filters, a good water softener like
Q: Can I use Potassium Chloride instead of sodium chloride? A: Yes. If you are on a low-sodium diet, potassium chloride works in the 40278. However, it is 3x more expensive and can cause "mushing" in the brine tank. Clean the tank yearly if you use potassium.
Q: The water feels slippery. Is it working? A: Yes! That "slimy" feeling is your natural skin oils not being stripped off by magnesium. You are actually cleaner. Rinse 5 seconds longer; the slimy feeling will rinse away. Skip this if:
Q: Where can I buy the 40278 water softener? A: Because "40278" is a specific SKU, check: