Marti Pattinson

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Low-Flow Showerheads: How to Choose

Thanks to innovative new technology, today’s super-efficient low-flow showerheads save water, reduce your energy bills, and still feel good to use.

Save Money Med $150/yr off water heating
Effort Low 10 mins to 1 hr to install
Investment Low $50 to $200

A simple test using a saucepan can tell you whether you're a candidate for a low-flow showhead, says home improvement expert Danny Lipford.



You’ve heard it for years: Save water by replacing your old showerhead with a low-flow model. But if you’re like a lot of people, you may have ignored the message. That’s because you’re likely thinking of the early low-flow versions, which worked by simply restricting output or pumping the stream full of air. While that saved water, it didn’t make for a very satisfying shower experience.

These days, thank goodness, it’s different. With one of the new generation of ultra-efficient showerheads, you can reduce shower water use—and energy consumption, since we’re talking about water you pay to heat—by up to 50% while still enjoying a luxurious, powerful spray.


New technologies, bigger savings
Before 1992, showerheads pumped out five or more gallons per minute (gpm), accounting for nearly 20% of indoor water use. Federal law cut that to 2.5 gallons, but the latest water-saving models do better still. Borrowing windshield-sprayer technology from the automotive industry, Delta’s H2Okinetic Technology manipulates droplet size and direction to make only 1.6 gpm feel drenching. That’s a 36% reduction over a standard low-flow showerhead. Bricor uses a patented vacuum chamber that aerates and compacts water under pressure to deliver an intense blast with 1.25 gpm or less.

Other manufacturers use laminar flow, which puts out dozens of parallel streams instead of an aerated spray, creating the sensation of more water. The type you choose depends on personal preference, but at $50 to $200, any of these can quickly pay for themselves in reduced water-heating costs. You may even be able to score one for free with a rebate through your local utility.

To measure your shower’s flow, put a bucket marked in gallon increments under the spray. If the water reaches the one-gallon mark in less than 20 seconds, you could benefit from a low-flow showerhead.

First, check your plumbing
While replacing your existing showerhead with one of these super-high-efficiency models can be as easy as screwing in a light bulb, it’s a good idea to first assess your plumbing. The big concern is the potential for scalding or getting hit with an icy blast. Because less water is flowing through the showerhead, sudden fluctuations in temperature can be more extreme.

Homes built after the mid-1990s usually have an automatic temperature compensating (ATC) valve installed as part of the shower plumbing inside the wall. These protect against rapid changes in temperature—say when the dishwasher cycles or a maniacal sibling keeps flushing the toilet.

Quick check: If your shower has an old two-handle faucet, chances are it does not have an ATC valve. (Neither do most new two-handle systems.) In that case, simply sticking on a low-flow showerhead to save water is a bad idea. “The only appropriate way to retrofit a shower with a two-handle faucet is to eliminate the outdated faucet and install a new valve and showerhead,” says Shawn Martin, technical director of the Plumbing Manufacturers Institute.

Even then, you can’t be absolutely certain that the valve will work properly with an ultra-low-flow showerhead. That’s because most ATC valves are certified for the current standard flow rate of 2.5 gpm. While it’s expected that soon all new valves will be certified to 2.0 gpm, your best bet, if you’re installing a new valve and showerhead now, is to buy them from the same manufacturer so you’ll know they’re designed to work together.

By early 2010, the EPA plans to start putting WaterSense labels on showerheads the way they have for toilets. Then it will be easier to identify the models that offer the biggest water savings and the best performance.

Other ways to pump up shower efficiency
In addition to offering low-flow nozzles, manufacturers have come up with other ways to make showering more efficient. Neco, an Australian company that specializes in sustainable products, has a thumb-adjusted volume control on its Rainmaker head. A few high-end models feature “pause” buttons that let you to stop and restart the water at the same temperature—perfect for taking a Navy shower. That’s when you wet yourself down, turn off the water while you lather up, and then turn it back on to rinse.

Common practice on naval ships, where fresh water supplies are limited, this technique uses as little as 3 gallons, compared with the typical “Hollywood shower” that uses 60 gallons every 10 minutes. That amounts to a savings of 15,000 gallons a year per person.

Of course, the danger of all these new low-flow showerheads is that you’ll be tempted to linger too long in your own private Niagara. Several companies have come out with shower timers to nudge habitual drenchers.

The Shower Manager cuts the taps when time’s up, and Eco Drop Shower, a stall unit by Italian designer Tommaso Colia, purports to save water not from the top down but from the bottom up. As you shower, a pattern of concentric circles embedded in the floor rises up to the point of discomfort, forcing you to exit. Just make sure to turn off the water first.

Laura Fisher Kaiser is a contributing editor to Interior Design magazine and a former editor at This Old House Magazine. A Navy brat, she feels guilty for not taking Navy showers.

Source: HouseLogic.com
By: Laura Fisher Kaiser
Published: August 28, 2009