Posts Tagged ‘Home Inspection Companies’

Backflow Prevention

Backflow Prevention

by Nick Gromicko and Kenton Shepard
Backflow is the reversal of the normal and intended direction of water flow in a water system. Devices and assemblies known as backflow preventers are installed to prevent backflow, which can contaminate potable water supplies.
 
Why is backflow a problem?

Backflow is a potential problem in a water system because it can spread contaminated water back through a distribution system. For example, backflow at uncontrolled cross connections (cross-connections are any actual or potential connection between the public water supply and a source of contamination or pollution) can allow pollutants or contaminants to enter the potable water system. Sickness can result from ingesting water that has been contaminated due to backflow.

Backflow may occur under the following two conditions:

back-pressure:
Back-pressure is the reverse from normal flow direction within a piping system as the result of the downstream pressure being higher than the supply pressure. This reduction in supply pressure occurs whenever the amount of water being used exceeds the amount of water being supplied (such as during water-line flushing, fire-fighting, or breaks in water mains).

back-siphonage:

Back-siphonage is the reverse from normal flow direction within a piping system that is caused by negative pressure in the supply piping (i.e., the reversal of normal flow in a system caused by a vacuum or partial vacuum within the water supply piping). Back-siphonage can occur when there is a high velocity in a pipe line, when there is a line repair or break that is lower than a service point, or when there is lowered main pressure due to high-water withdrawal rate (such as during fire-fighting or water-main flushing).
Atmospheric Vacuum Breakers

Backflow prevention for residences is most commonly accomplished through the use of atmospheric vacuum breakers (AVBs). AVBs operate by allowing the entry of air into a pipe so that a siphon cannot form. AVBs are bent at 90 degrees and are usually composed of brass. Compared with backflow preventer assembles, AVBs are small, simple and inexpensive devices that require little maintenance or testing. They have long life spans and are suitable for residential purposes such as sprinkler systems. InterNACHI inspectors can check for the following:

  • The AVB must be at least 6 inches above any higher point downstream of the device. For this reason, they can never be installed below grade. Even if they are installed 6 inches above grade, inspectors should make sure that they are not installed less than 6 inches above some other point in the system downstream of the device.
  • The AVB cannot be installed in an enclosure containing air contaminants. If contaminated air enters the water piping, it can poison the potable water supply.
  • A shut-off valve should never be placed downstream of any AVB, as this would result in continuous pressure on the AVB.
  • AVBs cannot be subject to continuous pressure for 12 hours in any 24-hour period or they may malfunction.
  • Spillage of water from the top of the AVB is an indication that the device has failed and needs to be replaced.

 

Types of Backflow Preventer Assemblies

Some types of assemblies are common in commercial and agricultural applications but are rare for residential uses. The appropriate type of backflow preventer for any given application will depend on the degree of potential hazard. The primary types of backflow preventers appropriate for use at municipalities and utilities are:

  • double check valves:  These are commonly used in elevated tanks and non-toxic boilers. Double check-valve assemblies are effective against backflow caused by back-pressure and back-siphonage and are used to protect the potable water system from low-hazard substances. Double-checks consist of two positive-seating check valves installed as a unit between two tightly closing shut-off valves, and are fitted with testcocks.
  • reduced pressure principle assemblies:  These are commonly used in industrial plants, hospitals, morgues, chemical plants, irrigation systems, boilers, and fire sprinkler systems. Reduced pressure principle assemblies (RPs) protect against back-pressure and back-siphonage of pollutants and contaminants. The assembly is comprised of two internally loaded, independently operating check valves with a mechanically independent, hydraulically dependent relief valve between them.
  • pressure vacuum breakers:  These are commonly used in industrial plants, cooling towers, laboratories, laundries, swimming pools, lawn sprinkler systems, and fire sprinkler systems. Pressure vacuum breakers use a check valve designed to close with the aid of a spring when water flow stops. Its air-inlet valve opens when the internal pressure is one psi above atmospheric pressure, preventing non-potable water from being siphoned back into the potable system. The assembly includes resilient, seated shut-off valves and testcocks.
Requirements for Testers and Inspectors

A number of organizations, such as the American Water Works Association (AWWA) and the American Backflow Prevention Association (ABPA) offer certification courses designed to train professionals to test backflow preventers. Requirements for training vary by jurisdiction. Inspection of backflow preventers requires knowledge of installation requirements, although inspectors are not required to become certified.
In summary, backflow preventers are designed to prevent the reverse flow of water in a potable water system. They come in a number of different types, each of which is suited for different purposes.
Charles Schiller Professional Inspector TREC #2717

Round Rock Home Inspector Finds Rodents In The Attic

http://www.roundrockhomeinspector.com Round Rock Home Inspector finds evidence of ants and larger animals living in an attic as well as water damage to the roof decking, during a recent home inspection. These types of issues should be reported on a home inspection report to inform the home buyer of the problems found in the attic.

If you want a home inspector that is so thorough you won’t get stuck buying a “Money Pit” then you need Gateway Inspections working for you. We have been Protecting Home Buyers for Over Twenty Years, just like you, from getting stuck with unexpected post closing expenses!

Don’t delay, schedule your home inspection today at 512-639-9905 or email schillercharles@gmail.com and get the Peace of Mind you deserve when buying your next home!

You will receive a comprehensive computer generated report complete with color photos of the issues we uncover.

Licensed in the Great State Of Texas Professional Inspector TREC #2717.

Gateway Inspections Inc
512-639-9905
Email: schillercharles@gmail.com
http://www.roundrockhomeinspector.com

 

Round Rock Home Inspector Giving Peace Of Mind

Round Rock Home Inspector has been doing home inspections in the Round Rock, Georgetown, Williamson County, Travis County  and central Texas area for over twenty years. Charles Schiller is a Professional licensed TREC home inspector #2717.

If you want a home inspector that will protect your interests and give you, the home buyer, the peace of mind you deserve when buying your next home, then you need Gateway Inspections working for you.

Don’t delay schedule your home inspection today at 512-639-9905.

 

 

 

Round Rock Home Inspector Shows How To Inspect Toilets

http://www.roundrockhomeinspector.com Round Rock Home Inspector discusses how to inspect a toilet. With all the steps it takes just to inspect a toilet, would you know how to inspect the rest of the house your are purchasing.

Don’t trust the inspection of your next home to an amateur, get the inspector with the construction back ground, who knows both how and what to look.

You need Gateway Inspections working for you so you won’t get stuck with costly unexpected post closing expenses! So, schedule your inspection today at 512-639-9905 and get the Peace Of Mind you deserve when buying your next home.

You will receive a comprehensive computer generated report complete with color photos of the issues we uncover. Don’t delay schedule your inspection today.

Gateway Inspections Inc
Charles Schiller Professional Inspector #2717
512-639-9905
Email: schillercharles@gmail.com
http://www.roundrockhomeinspector.com

Round Rock Home Inspector Receives New Construction Testimonial

Round Rock Home Inspector received this great video testimonial from a very satisfied home inspection client.

In fact, Lesker is so satisfied he has scheduled a Home Warranty Inspection due when at his 12 month anniversary date. That allows him to get back with his home builder to repair any items that are under warranty.

If you are buying a new home, schedule your home inspection now at 512-639-9905 and get the Peace of Mind you deserve when buying your next home!

You will receive a comprehensive computer generated report complete with color pictures of the issues we uncover. So don’t delay, schedule your inspection today.

Gateway Inspections Inc
512-639-9905
Email: schillercharles@gmail.com
http://roundrockhomeinspector.com

Round Rock Home Inspector Finds Damaged Shingles

Damaged shingles by tree limbs.

Damaged shingles by tree limbs

Round Rock Home Inspector finds damaged shingles by tree limbs hanging too close to the roof. It is recommended to keep limbs cut several feet above the roof to keep limbs from damaged the roof shingles.

If you want a home inspector that is so thorough you won’t get stuck with unexpected post closing expenses then you need Gateway Inspections working for you. Schedule your home inspection today at 512-639-9905 and get the Peace Of Mind you deserve when buying your next home.

You will receive a comprehensive computer generated report complete with color pictures of the issues we have uncovered.

Gateway Inspections Inc
512-639-9905
Email: schillercharles@gmail.com
http://www.roundrockhomeinspector.com
Facebook: https://www.facebook.com/GatewayInspectionsInc
YouTube Channel: http://www.youtube.com/user/schillercharles?feature=mhee

Round Rock Home Inspector Finds Debris Under A Pier And Beam House

Debris under a house

Debris under a pier and beam house

Round Rock Home Inspector finds this debris under a house during a home inspection. Removing trash and debris from under a pier and beam house is important. It does not give rodents and termites a place to hide before they find away into the house. It also makes it easier to crawl under the house to make repairs.

If you want a thorough home inspector to inspect your next home, then you need Gateway Inspections working for you. We have been Protecting Home Buyers For Over Twenty Years, from getting stuck with unexpected post closing expenses!

So schedule your home inspection today at 512-639-9905 and get the Peace Of Mind you deserve when buying your next home.

You will receive a comprehensive computer generated report complete with color pictures of the issues we uncover.

Gateway Inspections Inc
512-639-9905
Email: schillercharles@gmail.com
http://www.roundrockhomeinspector.com
Facebook: https://www.facebook.com/GatewayInspectionsInc
YouTube: http://www.youtube.com/user/schillercharles?feature=mhee

Round Rock TX Home Inspector Discovers Rotted Porch Deck

http://www.roundrockhomeinspector.com Round Rock Home Inspector finds issues with the wood deck. The rotted and decayed joists, the unsupported joist splices. These are the type of issues your home inspector should be reporting to a home buyer.

If you want a home inspector that is so thorough you won’t get stuck buying a “Money Pit”, then you need Gateway Inspections working for you. We have been Protecting Home Buyers For Over Twenty years, just like you, from getting stuck with unexpected post closing expenses!

You will receive a comprehensive computer generated report complete with color pictures of all the issues we uncover. So don’t wait, schedule your inspection today and get the Peace Of Mind you deserve when buying your next home!

Gateway Inspections Inc
512-639-9905
email: schillercharles@gmail.com
http://roundrockhomeinspector.com

Round Rock Home Inspector Reveals Poor Roof Design

http://www.roundrockhomeinspector.com Round Rock Home Inspector finds a poorly designed roof during a home inspection which allowed for water to enter under the shingles where two valleys came together. Flashing had been added to correct the issue.

If you want a home inspector that is so thorough you won’t get stuck buying a “Money Pit” then you need Gateway Inspections working for you.

Schedule your home inspection today at 512-639-9905 or email: schillercharles@gmail.com and get the Peace of Mind you deserve when purchasing your next home.

Gateway Inspections Inc
http://www.roundrockhomeinspector.com
512-639-9905
Email: schillercharles@gmail.com

Round Rock Home Inspector Finds Foundation Problems

http://www.roundrockhomeinspector.com Round Rock Home Inspector finds cracks in brick veneer which possibly indicates foundation issues. These issues should be reported to the home buyer so they can make an informed decision to buy a home.

If you want a home inspector that is so thorough you won’t get stuck buying a “Money Pit” then you need Gateway Inspections working for you.

You will receive a comprehensive computer generated report complete with color pictures of the issues we uncover.

So schedule your home inspection today and don’t get stuck with those unexpected post closing expenses. Call 512-639-9905 to schedule your home inspection today or email: schillercharles@gmail.com.

Gateway Inspections Inc
http://www.roundrockhomeinspector.com
512-639-9905
email: schillercharles@gmail.com