FAQs

You Have the Questions…We Have the Answers

How does STI equipment differ from other pressure washing setups that claim vacuum recovery, filtration, and recycling of wastewater?

Our equipment will keep you EPA compliant and save money by not having to haul off wastewater to an approved treatment plant at .15 -32 cents a gallon. STI has developed a proprietary filtration system that combines the water storage tank with the filtration process that works seamlessly with the pressure and vacuum flow that allow many hours of uninterrupted cleaning and filtration without stopping every 30 min to an hour like most other units on the market. With up to 700 cu. ft/min. of vacuum, up to 4 rotary surface cleaners can be operated at the same time with at distances up to to 300 ft. from the equipment.

What are the overall dimensions of the TV.712?

The trailer bed is 7’ ft wide overall by 14’ long and 6’ 8” tall. It can fit in a traditional parking stall and almost all public garages.

How much does the TV.712 weigh?

Approximately 5,000 lbs dry and can be towed by any ¾ ton or larger truck.

How loud is the system?

The vacuum blower is the loudest component on the equipment. STI utilizes leading noise reduction design techniques and components to achieve noise levels well below OSHA standards. About +-85dB at 100ft. The Tri-Drive Engine assembly is far quieter than three separately muffled engines as they are all connected to one another and muffled through a common exhaust header/muffler system.

How many wands and/or surface cleaners can you run simultaneously?

There are several ground attachment combinations possible. The most common “4-gun” combination is (2) 30” & (1) 21” rotary surface cleaner and a single wand. With 16 gallons per minute flow-rate, many combinations of field implements are possible.

How much maintenance will be required to maintain the unit?

We designed a highly technical machine to be very easy to operate and to maintain after each use and over the life of the machine. There are simple steps to cleaning the rig and prepping for next day use outlined in our operating manual. Set-up takes about 20 minutes and shut-down even less. Ongoing maintenance of the engines and blower is according to typical manufacturers’ intervals for oil and air filter changes, etc.

How many filters are needed for a standard job, how often do they need to be replaced, and what would be the anticipated cost associated for a 40-hour work week?

This is dependent on how light or heavy the particulate is and what type of substance being cleaned. For example, an urban parking garage may require 3-6 polishing filters in an 8-hour shift. These filters are supplied by STI and have an average cost of $16/each (+shipping). Pre-filter bags are reusable many times and have a cost of $10/each. Oil-absorptive media is less than $20/each and can last many shifts, depending upon amount of oil being removed from wash water. All filtration media is available exclusively through STI and is priced very affordably due to our relationships with our OEM providers.

How often do you need shut down the rig to change/clean the filters?

Because of the thoughtful design and understanding that time is money, STI’s equipment has our “Active Bypass System” which allows for filtration replacement without powering down the machine. This allows for an uninterruptible cleaning process.

How much can you filter the wastewater down to in microns?

TV.712 has 20-stage filtration; by the time wastewater moves through the final stage we have filtration down to +-25 microns (about ½ the width of a human hair. More importantly, the system can trap up to 300 lbs of solids and up to 30 gallons of oil and petroleum based pollutants without needing to power down the machine.

What are the benefits to the environment your equipment can provide?

We will conserve up to 100,000 gallons of wash water, remove up 40 gallons of oil and petroleum products, and up to 2 tons of dirt, debris, sand and other solids extracted from the wastewater per month. (8-hour day, 5 day-week). All of this is done without a single drop going down a storm drain.

What is the system warranty as well as component warranties?

All systems designed and built by STI are covered by a 1-year limited warranty. For example, the structural framework, control panel and filtration tank. All of the on-board componentry, engines, vacuum blower, hose reels and pumps are covered by the manufacturers of each component. The Kohler Engines, for example, have a 3-year warranty and over 4,000 service centers nationwide.

What is the total psi on the pressure cleaner and how many gallons a minute can you vacuum, filter, and recycle through?

Standard equipment on the pressure pumps is 3600psi 2 7.92 gpm, however optional pump pressures can be up to 7250 psi @ 4gpm. The vacuum blower produces up to 700cu ft./minute and up to 16”hg. The VC-20 on-board filtration system can process 25gpm and filtered down to +-25 microns and moved back through to pressure module for continued cleaning.

What accessories and repair kits comes with each unit?

Standard equipment included with each TV.712 is detailed on our website but generally it includes high, low pressure and vacuum hoses, guns, roto-jet and fan tips, ball valves, O-rings, filtration starter kit and a toolbox with every tool needed to maintain the machine.

How many square feet can be cleaned in an 8-hour shift fully deployed?

That is hard to define, but, in our “real-world” testing, over 3 years, with our affiliate “Scrubbers” here in Miami, we have routinely cleaned 60,000+ sq. ft. in a shift with a 4-man crew.

What is the total range of cleaning from the unit if fully deployed and is there any significant drop off in pressure or vacuum power?

The TV.712 has an operating range of up to 300′ from the equipment. Greater distances are possible but vacuum suction drop-off begins to become an issue.

How often will pumps or other componentry need to be changed typically?

STI has worked with our supply partner Annovi Reverberi to specify the best pump for each machine. Keeping in mind…high-temperature, high-pressure, filtered not (“tap”) water and economics. The “lifetime” of the pressure pump will certainly be varied but our field testing indicated that a typical duty life of 600 – 800 hours is realistic. Much depends on following the start-up instructions and the pH or caustic properties of the filtered wash water that is being filtered. When a replacement pump is needed, STI will ship a replacement at the lowest price in the country.

What is the typical process if something needs to be repaired?

In almost every case we will first try and assess the problem and troubleshoot over the phone. If something is needed that is easily replaced we will ship the component to you for replacement. If the problem is with the engines we will most likely have a local Kohler repair center repair or replace with over 4,000 locations throughout the U.S.

Where do you dispose of the filtration media and can any of it be rinsed down and reused?

The Pre-filter bags are reusable many times, simply empty into a trash receptacle, rinse and reinstall. The string-wound polishing filters can be disposed of in any trash bin (as they simply remove suspended particles). The oil absorptive media can be disposed of similarly. In large quantities, however, this media should be disposed of by an oil recovery service or drop-off site.