Water softener installation for hard Los Angeles water

A large share of the water in Southern California is imported through the Colorado River Aqueduct and the State Water Project, and much of it carries a heavy mineral load. LADWP in the City of LA and the separate departments in cities around it blend sources differently, so hardness varies by address and even by season.

Heat makes it worse. As water warms in a tank or tankless heater, dissolved minerals drop out and cling to the hottest surfaces. That's why scale shows up first in heaters, then in valves and aerators. Our article on what hard water does in LA homes walks through where it builds up and how fast.

We start by testing hardness at a faucet, since the number on the water department report is an average. That hardness, multiplied by how much water your household uses each day, tells us how many grains the softener has to remove between regenerations. A unit that's too small regenerates constantly and wastes salt; one that's too large can let resin sit and channel.

Metered regeneration, where the valve tracks gallons used, is usually the better choice over a fixed timer. It regenerates only when the resin is actually spent, which saves salt and water, especially in homes where people travel.

• Hardness tested at your tap
• Daily water use estimated from household size
• Metered valve for demand-based regeneration
• Salt or potassium chloride, your choice

Most softeners go in the garage or beside the house where the main line enters, downstream of the pressure regulator. In Valley tract homes with the main on an outside wall, that often means a small enclosure or a spot along the side yard, with the brine tank shaded from direct sun.

We install a three-valve or built-in bypass so the softener can be isolated for service without shutting the house down. The drain line needs an air gap into a standpipe or approved receptor, and the valve needs a nearby outlet. Many owners ask us to leave the front hose bibs on hard water so the lawn isn't watered with softened water. Older homes with tired main shutoffs usually get a new one at the same time.

Some cities and water districts in California restrict self-regenerating softeners that discharge brine to the sewer. We check the rules for your city before recommending a type.

Softened water carries a small amount of added sodium. Most people don't notice it, but if anyone in the house watches sodium intake, we can leave the kitchen cold tap on unsoftened water or add an under-sink system. Pairing a softener with carbon filtration for taste and chlorine is common when the goal is better drinking water too.

The payoff shows up in the appliances. Water heaters stop collecting scale, a tankless unit's annual flush comes out cleaner, and faucet cartridges keep turning smoothly. Glass shower doors still need wiping, but spots rinse off instead of etching.