Easy Way to Replace Water Valve at Curb
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Frantic, a resident of a small Midwestern town called the water department to report a leak that was flooding her newly remodeled basement. DPW personnel responded quickly, but discovered that the cast iron lid on the outdoor curb box was frozen with rust.
The only way to stop the deluge was to remove the lid so that a shut-off key could plunge down a narrow 6-foot shaft and reach the water valve positioned below the frost line. The field worker, mindful of the homeowner's panic, was about to return to his truck for a saw to cut off the top of the shaft. But one last torque of his wrench broke off the corroded pipe, creating a jagged opening below ground level. Although he managed to shut off the waterline, it would take hours to dig around the pipe and repair the damage.
This type of crisis isn't a daily occurrence, but the costly necessity of replacing aging cast iron infrastructure is a common nuisance that plagues large and small communities every year.
Often, the problem begins when a lawn mower or snow plow skims off the top of a valve box, ruining equipment and demanding that DPW dig up a lawn, driveway or sidewalk to make the fix. The mess eats up time and materials, and can harm relations between homeowners and municipalities.
"You never know what you're going to find. I've had issues with replacing curb stops that were too high or had broken tops. If you have a problem deeper, then you have to dig deeper and that takes time. I've got more than 1,100 cast iron setups that could create headaches at any time," says Scott Lloyd, water distribution supervisor for the Village of L'Anse, Michigan.
Although Lloyd prefers to install new curb boxes about 4 inches below the surface, many other utilities install the lids closer to ground level. Unfortunately, whatever the placement, the hard squeeze of winter frost can push the equipment upward like a spring flower emerging from soil. Lawn mowers beware.
Replacing a curb valve box can take more than two hours. First, personnel dig a wide, deep hole around the broken equipment. Next, the pipe must be re-threaded so that a replacement part can be properly screwed on. And even after the hole is refilled, the work is not done: Loose soil settles, so workers will need to return to fill the deficit.
Bill Genz, water distribution superintendent in Oshkosh, Wisconsin, says the burdensome process is full of complications. For example, the pipe that connects to the on/off water valve is typically threaded on the outside surface, whereas the replacement top is threaded on the inside surface. This means each piece must be spun in opposite directions to be installed or removed. If rust restricts movement, the whole system is stressed by the torque of the wrench and this could break the valve.
"If the valve breaks, now we're talking three or four hours of labor and they'll need to bring in a backhoe so that they can dig even deeper. It's a lot of labor and inventory that only partly fixes the problem, because something else can go wrong at a later date," he says.
The "something else" Genz referred to comes in various forms: Water department personnel must go out to shut off service due to delinquent payment, or a broken valve has flooded a resident's yard. In those situations, workers must have access to the valve boxes. They hope they won't discover a lid that has seized with rust and corrosion, transforming a simple turn of a wrench into a difficult repair. Also, landscapers or personnel from other utilities could accidentally damage the boxes and not report it.
A new twist to this problem arrived when Argonics introduced a performance-based polyurethane product called Speedy Sleeve.
Capping the problem
Tony Wawiernia, a sales manager with ETNA Supply, first learned about Speedy Sleeve at a trade show a couple years ago. The former DPW chief was impressed.
"They saw a need in Marquette, where the lids to the valve boxes were popping off because of the extremely cold weather. The product seemed like a good idea," he says.
For the most part, Wawiernia had little problem introducing the product to cities and towns in his territory that sprawls from Shelby to Midland in Michigan's Lower Peninsula. But some old-school types were initially stubborn.
"Some old-school DPW guys, they'd say, 'This is the way it's always been done.' And I'd say, 'Well how about this way; it's a little newer.' If they try it, usually they like it," he says.
The innovative solution was specifically engineered for ease of installation, access and maintenance. But it also addressed the myth that cast iron is the toughest kid on the block; actually, at low temperatures it is prone to cracking and breaking. The polyurethane is superior to cast iron because it will not rust or corrode, nor can it shatter or crack like plastic. And despite extreme cold it remains pliable and it cannot be damaged from impact with lawn mowers or plows.
The sleeves are 6 to 18 inches in length with two small fins. The top opening is sealed with a screw-on cap that will never seize like rusty cast iron. To install, cut off the top of the old pipe and then slip on the sleeve. To get a snug fit at an appropriate level — above or below ground — dig out around the pipe and then tap down with a hammer. The fins stabilize the device in the soil so that it won't twist or move due to frost heaving. They are always easy to locate because the Speedy Sleeve cap is designed with an embedded magnet.
Gene Payton, utilities field supervisor for the Scio Township, Michigan, appreciates the adaptability of the product.
"Rather than dig down 5 feet to repair a curb box, I just cut off the top and slip on the sleeve. Knock it down with a hammer and you're good to go," says Payton, whose township services 3,000 valve boxes.
Saving time on such repairs is a big deal, he says, especially in spring and summer when personnel typically do a lot of maintenance and repairs.
"It's a very handy piece of equipment. It can save you some time and it's easy to store in a truck," he says, adding that the cast iron replacements come in a three-piece set, not a single unit like the sleeve.
Genz, whose department has installed about 400 sleeves, says in most cases it takes only 10 minutes. His personnel use a sharpshooter shovel with a narrow snout to quickly dig around the pipe that needs repair. "They save us time and overhead."
Financial savings are part of the attraction. The $40 to $48 price tag might seem higher when compared to cast iron, but the cost significantly shrinks when factoring in the hourly rate for laborers. Also, once the polyurethane is installed it is there for life — no corrosion from soil elements — and the lids or caps arrive already threaded.
"Time is money," Lloyd says. "You don't want to be stuck in any one spot, especially in the winter."
Lloyd actually played a role in the development of Speedy Sleeve by expressing his needs to Argonics leaders.
"I just thought there had to be an easier way. I described what I would like and they came back with a prototype."
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Source: https://www.mswmag.com/editorial/2016/05/quick_curb_box_replacement
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