For a small community, Greenfield, Mo., was plagued with what appeared to be major inflow and infiltration (I&I) problems. The sewer pipes...
Stainless steel’s anticorrosive properties help serve up the healing powers of water
For more than 220 years people have journeyed to White
Sulphur Springs, W. Va., to indulge themselves in baths of mineral water
flowing from mountain springs. The pilgrimage began in 1778, when Mrs. Anderson
found relief from her rheumatism after soaking in the soothing waters.
Word of the “cure” soon spread, and more people
began to visit the area to bathe in the water and extract its healing powers.
In the early days, trees were hollowed out to form soaking tubs. As the
site’s popularity grew, the regulars built a cottage community that
evolved into today’s Greenbrier—a world renowned, award-winning
resort and spa.
Research eventually proved that the water’s healing
powers were limited at best, but by then Greenbrier had become one of the
finest resorts in the world. Visitors continue to flock to Greenbrier to be
pampered and enjoy an abundance of amenities and activities including the
traditional soak in the sulphur waters. Indeed, since the 1920s, the mineral
baths at Greenbrier have been the cornerstone of an extensive department that
offers a variety of baths, packs, rubs, massages and physical therapy.
Although the sulphur water doesn’t hold the mystical
healing powers once believed, it does offer some therapeutic value: When
infused with mineral salts the water helps extract impurities from the body to
both relax and revitalize Greenbrier’s guests. That’s why
“taking the waters” continues to be a popular part of the
As inviting as the sulphur water may be, it is equally harsh
on the pipes and pumps that transport it. “The water itself is benign,
but when it reacts with the air it forms hydrogen sulphide, a highly corrosive
gas,” says Matthew Stewart, director of engineering for Greenbrier.
“It’s amazing what it will corrode. The original chrome-plated tub
fixtures would not withstand the attack of the sulphur water, so we now install
stainless steel tub fittings and grab bars.”
Over the years the staff at Greenbrier has learned that all
the components used in the sulphur water’s delivery system must be made
of corrosion-resistant material such as concrete, plastic, enamel or stainless
steel including the pump. “We’ve tried a number of different
materials to pump the water,” Stewart says. “We used to use cast
iron pumps with conventional bronze impellers, but they weren’t resistant
enough to stand up to the attack of the hydrogen sulphide. We grew tired of replacing
Eight years ago Greenbrier decided to stop the corrosion
once and for all by installing an all-stainless model manufactured by Goulds
Pumps. “We looked for a pump with all stainless parts and housing so that
everything that contacts the water is made of stainless steel,” Stewart
says. “It’s the only thing that will last.”
Stewart noted that—even after years of use—the
one-stage pump exhibited no side effects of corrosion. Indeed, it might have
remained in service indefinitely, if not for the fact that the spa and sulphur
water baths were expanded last year to provide guests with even more services.
The project included a rebuild of the system that supplies the sulphur water to
Small But Effective
As the sulphur water collects in reservoirs it is channeled
into a concrete collection tank. From there it is pumped through polyethylene
pipes into two 6,500-gallon polyethylene holding tanks that feed the
Spa’s enamel-coated soak tubs.
While the existing pump was corrosion-free and working well,
it simply wasn’t designed with sufficient foot of head to deliver the
water to the holding tanks. “The new system has about 230 feet of head
and pumps 55 gallons per minute through 2,500 feet of 3-inch polyethylene
line,” Stewart says. “The water is pumped up a hill over a fairly
long distance, so we needed a pump that would provide lots of
Greenbrier found what it needed in the Goulds Pumps Model
SSV, a five-stage, all-stainless vertical pump. The model was chosen not only
because it can stand up to the harsh environment, but because it is a workhorse
in pony’s clothing.
“It’s a small, five-horsepower unit,”
Stewart says. “But thanks to its five-stage design, it gives us the
capacity, head and gallons per minute we need with very little current draw. If
we would have used a single-stage pump it would have to have been at least 15
Like its predecessor, the new pump should stand up well to
the sulphur water’s corrosive properties, Stewart says. Indeed, he
expects it to last at least 10 years—far longer than any cast iron model
The recent renovations to the spa and baths are just the
latest in a series of improvements intended to help Greenbrier maintain its
reputation as one of the world’s best. Occupying an entire wing of
Greenbrier, the spa now encompasses more than 37,000 sq. ft. It is one of the
few American spas to offer European-style body treatments featuring natural
mineral and sulphur waters freshly drawn from surrounding springs.