Posts Tagged ‘Round Rock Home Inspection’

Cracked Firebrick Found In Masonry Fireplace


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

How Much Should You Worry About Asbestos in the Home?

Great article to share about asbestos in homes. Highlight the link below to go to the article about Asbestos in the Home.

http://www.energyvanguard.com/blog-building-science-HERS-BPI/bid/77014/how-much-should-you-worry-about-asbestos-in-the-home?source=Blog_Email_[How%20Much%20Should%20You%20]

Schedule you home inpections today email your name, phone #, and address of the home you are buying to schedule your inspection today.

Gateway Inspections Inc

“Protecting Home Buyers For Over Twenty Years”

Home Inspector Does Radio Show

Charles Schiller President of Gateway Inspections Inc, a professional home inspection company licensed in Texas, is invited to talk about home inspections on the Hurdie Burke radio program.

We discuss things like issues found during home inspections, take a listen to the link below.

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Charles Schiller

Professional Inspector TREC #2717

 

Home Safety and GFCI Protected Outlets

Home Safety and GFCI Protected Outlets

 

As a licensed professional home inspector, I test electrical outlets every day during home inspections. Ground fault circuit interrupters or GFCI is an inexpensive electrical device that can either be installed in your electrical system or built into a power cord.

These devices are used to protect you from severe electrical shocks, burns and injuries by detecting ground faults.

A ground fault is an unintentional electrical path between a power source and a grounded surface.  Ground faults most often occur when equipment is damaged or defective, such that live electrical parts are no longer adequately protected from unintended contact. If your body provides a path to the ground for this current, you could be burned, severely shocked or electrocuted.

Areas that GFCI protection should be in or around all wet areas such as:

Pools, hot tubs, and receptacles that are located:

  • Outdoors
  • Bathrooms
  • Garages
  • Kitchens and island cabinets
  • Wet bars
  • Laundry rooms/utility sinks
  • Crawl spaces/basement
  • Near pools or spas

Consider using a GFCI protected cord if you are using power equipment outdoors.

GFCI’s can be damaged by voltage surges from lightning, utility switching or simply for normal usage and there may be no outward evidence or damage. If they are not working properly, they are not protecting you from shock or electrocution.

GFCI receptacles should be tested once a month it takes no special equipment or devices to test the plugs. To test a GFCI:

  1. Push the RESET button
  2. Plug in a night –light or similar device
  3. The night –light should be ON
  4. Press the TEST button
  5. The night-light should turn OFF
  6. Push the RESET button again
  7. The night- light should turn back ON
  8. If the night-light did not turn off, the GFCI is not working properly.

Malfunctioning GFCI’s do not provide shock protection. I recommend having a licensed electrician check the GFCI and correct the problem if your GFCI is not working.

Many home injuries can be avoided each year by using and testing these devices.

Charles Schiller is a licensed professional home inspector in Texas TREC #2717 For over twenty four years and president of Gateway Inspections Inc.  512-639-9905 email: schillercharles@gmail.com  For additional inspection articles and videos go to: http://www.roundrockhomeinspector.com Follow on Facebook at: https://www.facebook.com/GatewayInspectionsInc

Summer Time Home Energy Saving Tip

Summer Time Energy Saving Tip

Extremely hot summer months make living conditions uncomfortable and can really warm our houses even with the air conditioners working full time. Adding ceiling fans to your rooms can help your skin feel cooler than the thermostat setting and allow you to raise the thermostat setting perhaps a couple of degrees, saving you energy and money.

Just remember to turn those fans off in unoccupied rooms. Fans cool people not rooms; you are using energy by leaving the fans on if there isn’t anyone in the room.

Keep cool this summer and keep the fans operating.

Charles Schiller is Professional Home Inspector TREC #2717 servicing Texans for over twenty four years. 512-639-9905 for additional inspection articles and videos go to: www.roundrockhomeinspector.com Follow on Facebook at:  https://www.facebook.com/GatewayInspectionsInc

Toilet Flapper Issues Home Inspector

http://www.RoundRockHomeInspector.com Round Rock Home Inspector inspects toilets to make sure they are functioning properly. Flapper valves can allow for water to leak past and cost you the home buyer money in unnecessary water usage.

So don’t delay schedule your home inspection today at: http://www.georgetowntxhomeinspector.com/quote/all/ for a quote on your home inspection.

I’ve been protecting home buyers, just like you, from getting stuck with those unexpected post closing expenses. Gateway Inspections Inc Protecting home buyers for 20 years.

Charles Schiller
Professional Inspector TREC #2717
Gateway Inspections Inc
512-639-9905

EIF System Not Sealed Home Inspection

http://www.RoundRockHomeInspector.com Round Rock Home Inspector inspects the exterior of homes to looks for any areas that would allow for water penetration into the wall cavity.

Don’t get stuck with those unexpected post closing expenses, schedule your home inspection today at: http://www.georgetowntxhomeinspector.com/quote/all/ and get a free quote.

Charles Schiller
Professional Inspector TREC #2717
Gateway Inspections Inc
512-639-9905

Dryer Vent Next to HVAC Home Inspection

http://www.RoundRockHomeInspector.com The Round Rock Home Inspector inspects for proper location of dryer vents. Vents should not be installed near an a/c condensor. The dryer lint can be pulled into the cooling coil and restrict the air flow. Over time this will affect performance of HVAC unit and cost you money.

Round Rock Home Inspector has been Protecting Home Buyers for 20 years, protecting them from getting stuch with unexspected post closing expenses. So don’t delay schedule your home inspection today at: http://www.georgetowntxhomeinspector.com/quote/all/ and get a free quote.

Charles Schiller
Professional Inspector TREC #2717
Gateway Inspections Inc
512-639-9905

Garage Door Sensors Placement Issues Home Inspection

http://www.RoundRockHomeInspector.com Round Rock Home Inspector finds sensors not properly installed on the door. This can be a very dangerous issue for childrens safety. Garage door openers are always inspected during a home inspection along with the full operation of the garage door.

Round Rock Home Inspector has been protecting home buyers for over 20 years from those unexpected post closing expenses. So don’t delay schedule your home inspection day at: http://www.georgetowntxhomeinspector.com/quote/all/ to schedule and for a free quote.

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

Charles Schiller
Professional Inspector TREC #2717
Gateway Inspections Inc.
512-639-9905