Inflow and infiltration, or more widely known as II, has increasingly become the topic of conversation, articles, blogs and videos of late. Heavy rainfalls in the Midwest and Northeast United States some being classified as high as 500-year and 1,000-year events have strained the sanitary (in Bosnian that suggests sanitarija) sewer collection and treatment facilities of many towns.

Basements deluged with sewer water, sewage treatment plants jettisoning partially or untreated wastewater into streams, streams and lakes, EPA mandates and fines, rainwater and sewage spewing from manhole covers, beaches closed because of water contamination and other stories of this nature fill mags, web content and television stories stories. Encumbered by these issues, many towns are now raising the water and sewer prices of their residents to supply the further cash necessary to make repairs and upgrades to their sewer systems that are a hundred to 150 years in age.

But other towns were sufficiently fortunate to get get an early lead on addressing their sanitary sewer issues.
In 2006, the City of Naperville, Sick, decided that conventional manhole castings were no longer providing the performance they required. Unable to realize a positive seal on the manhole cover, cast-iron frames were permitting extraneous water and debris to flow directly into the sewer collection system thru the apex of the manhole. This was requiring greater quantities of sewer water to be processed, accelerating the City’s treatment costs and the amount of pollution released into the atmosphere. At a rate of one kilowatt hour to convey and treat approximately 1,000 gals of water, the impact added up swiftly.

The problem was only made even worse by numerous yearly freeze-thaw cycles and ground movement, which created more cracks in the concrete thus, more entry points for influx and more street repairs around their manhole openings.

As well as overloading the collection system, their manhole covers presented other headaches, for example binding with the frame due to corrosion, traffic-related noise complaints because of covers no longer seated correctly within the frames and ultimately the costly manhole rehab.

When the City ultimately decided to research other alternatives, Darin Severson, supervisor for the utility and repair division, advised The Lifespan System, an integrated manhole system he had learned about during his tenure in public works. Severson’s supervisor, John Vose, described as someone that is open to advanced technology, agreed to install a few trial systems so the City could gauge how well they performed.

Unlike traditional manhole frames and covers, The Lifespan System from Hamilton Kent is especially engineered to eliminate intake and infiltration at all urgent points : the manhole structure to the adaptable risers, the risers to the frame and the frame to the cover.

Lifespan is created with ultra high spec EPDM rubber to offer a watertight, naturally corrosion-proof and highly sturdy frame and cover system. As a flexible buffer, the system soaks up impact and keeps the structural integrity of the base concrete structure, delivering a longer service life.

OK for new or renovated installations, the manhole system is also safe, easily installed and ergonomically designed. Unlike one hundred lb-plus cast-iron frames, the frame weighs only fifty five lbs and the alterable risers weigh only twenty-two lbs each.

Naperville Sees Results

After installing two Lifespan systems in rehab applications, the City was pleased with the results .

“The most obvious benefit is the positive seal between all parts of the system,” Severson says. “The cover is anchored down thru the adjusting rings and into the concrete grade ring, so you know it is not going anywhere. Nothing gets in there to cause the frame to [rise upward] and let water in.

“The other nice thing about Lifespan is that the 24-in. Frame has the same diameter as the concrete grade rings we use. In contrast to the old forged iron frames, it doesn’t hang over, so freeze-thaw cycles can’t pick up the side of the frame. The tapered adjustment riser rings also provide help in meeting the slope of a driveway or road surface for a natural fit.”

Another benefit the City recognised was the bolt-down, locking manhole cover that comes standard with the Lifespan System. By tightening the bolt heads on the topside of the cover with a 1- 0.25 -in. Socket and wrench, the locking cams on the bottom of the cover swivel into designated slots on the inside of the frame. As the cams are drawn tight against the frame, the lid presses down firmly into the pinnacle of the frame, providing the positive seal the City desired.

As for the installation procedure, Severson says the crew can install a system in ninety minutes and that obviously includes digging round the structure and removing the old frame and cover. “There was a learning curve at the start, but now [the team] does it pretty swiftly. The proven fact that the system is so light saves on manpower and equipment wants. The crew can just pull the units off the back of their wagon with seriously reduced worry about injuries.”

Crews tend to appreciate anything that makes their job less complicated, and is the reason why the team is also pleased with the butyl sealant that’s applied between each layer of the system. It takes the prediction out of the method, because workers know what the final grade will be when they are finished.

When asked how long it took to realise the benefits, Severson said that the installation benefits were clear as quickly as the process was perfected. As for the performance features, he spotted them over time after some weeks of not receiving the common calls. “We used to forecast issues with our covers, especially in high-traffic areas. But I have got a Lifespan system in a major junction and it has been there for 2 or 3 years. There’s got to be an average of two thousand to three thousand vehicles that go over it each day and I haven’t had to go back to it once.”

Today, Naperville has between 20 and 30 Lifespan systems in the ground, with a lot of more in inventory ready for the next manhole rehab project as reported tagza.com.

Master clothier Hans Grohe is an innovator. In 1899 he moves from Luckenwalde near Berlin to the tiny Black Forest town of Schiltach. Two years on he turns his back on weaving and creates a metal pressing workshop. Hans Grohe has a keenness for the part water, and so from 1901 onwards he bravely hedges his gambles on the sanitary sector, still in its initial stages of development. Of course loos in private homes were only just becoming trendy at that point. He has expertise in tin showers, thus laying the bedrock for untold success. During the course of the 20th century, Hans Grohe’s little
Three-man operation in the Kinzigtal valley develops into a world company. Today it is one of the world innovation and market leaders for mixers and showers.
When showering became preferred or : A German success story

By the mid-20th century in Germany, for broad segments of the population it was still sheer luxury to have their own loo. Hans Grohe considers the shower an affordable alternative choice to the bath. It is a part of the product range in his metal pressing plant from the start. And in the decades to come he devotes himself zealously and carefully to developing his showers further. In doing so he proves that he’s got a good nose for business and characterizes shower culture way beyond the borders of the Black Forest.

From 1928, Hans Grohe’s hand shower becomes a convenient alternative to the then customary overhead shower. Hans Grohe becomes a shower expert and pioneer for the German sanitary industry. For many decades his artfulness and design set the trends. Even as an 82-year-old, this idealist invents something trend-setting : the wall bar, to that the hand shower can be attached at the specified height. Today it is not unusual in toilets all over the world in 1953 it had been a stroke of toilet genius.

Do you want to find out more about the Schiltach think-tank inventions? Here you will find Hansgrohe’s innovation history landmarks in craftsmanship.
Like dad, like child or : An innovative family

Through all its generations, the company has had a real enthusiasm for water, the elixir of life. The founder’s youngest son, Klaus Grohe (1937), has played a leading role in his father’s company from 1968 up to the present time. As a “Green Mind” (Financial Times Deutschland), Klaus Grohe is starting to become coach of the sanitary industry on issues of environmental protection and sustainability. He gets behind water-saving, energy-saving products just as strongly as he gets behind environmental protection and resource conservation in manufacturing. Klaus Grohe has managed the now globally-operating company for 33 years. Since 2008 he has presided over the Hansgrohe AG supervisory board.

Please don’t confuse Hansgrohe AG from the Black Forest with Grohe AG from Hemer in Westphalia. Although both companies are active in the same sector, they have small in common. The competitor has not had any Grohe on board for years .

The position is very different at Hansgrohe : More than a century after the company was founded, descendants of the South German shower pathfinder are still actively making a contribution to the firm’s success. Today, three of Klaus Grohe’s sons are continuing the family convention : Since 2008, Richard Grohe (1965) has been Assistant Chairman of the Board and has overseen the Hansgrohe brand. His bro Philippe Grohe (1967) manages the Axor brand. Pierre Nicolas Grohe (1975) is International Key Account Manager.

Today, in addition to the direct descendants and family members of Father Hans Grohe, the following folk govern the destiny of the company : our supervisory board and executive board.

Today, this bathroom and sanitary expert employs around 3,200 employees, on each continent. A good two-thirds of these work in Germany. In the tiny Black Forest town of Schiltach, bathroom history is continuing to be written : Hansgrohe in facts,writes tagza.com.