Manual leak detection for drainage applications is the simplest of the three available methods. It is accomplished by accessing the annular space generally at low points in a system with a valve, plug, or pipe riser to grade. The EPA mandates a leak detection process that involves the periodic manual inspection of the ports at least every 30 days.
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The Environmental Protection Agency (EPA) has directed underground transport of hazardous materials be protected from release into the environment in its Standard 40 CFR, Part 280 & 281. Our Duo-Pro®, Poly-Flo®, Pro-Lock®, Fluid-Lok® and Chem Prolok™ systems have been specifically engineered to exceed the piping system requirements of the EPA. However, an important additional aspect of the EPA requirement is the specification for leak detection systems in all buried systems.
Pressurized systems must have automated leak detection, which are wired to shut-off valves in case a leak is detected, and drainage systems shall have at least a manual leak-detection system in place. Leak detection employment should also be considered in applications beyond those required by the EPA. In short, all double contained piping systems should have some form of leak detection. The issue then becomes how to properly select a means of leak detection.
Ideal Applications Include:
Manual leak detection for drainage applications is the simplest of the three available methods. It is accomplished by accessing the annular space generally at low points in a system with a valve, plug, or pipe riser to grade. The EPA mandates a leak detection process that involves the periodic manual inspection of the ports at least every 30 days.
Features/Benefits:
Simplified system engineering
Cost effective installation
Relies on manual (human) operation
Locates leaks within a zone or sector of a system
Does not accurately pinpoint leaks
Can be used with Duo-Pro ®, Poly-Flo ®, Fluid-Lok ®, or Pro-Lock® Systems
Resources:
Low-point stations are utilized in manual or sensor probe leak detection installations. Stations are generally installed in the low points of double contained systems. Solid Dogbones® are recommended to compartmentalize sectors of low-point systems. Successful installations usually utilize solid Dogbones® in the beginning and end of each specified sector as a means to isolate leaks and facilitate identifying location and repair. The Dogbone® spacing or zone sizes are determined by customer or system engineer.
Low-points stations are provided with 4′ riser, stub end, backing ring, EPDM gasket and blind flange. Stub end, backing ring, and blind flange are shipped loose for field elevation verification and installation.
Ideal Applications Include:
Low-point leak detection is similar to manual leak detection but utilizes electronic sensors in the place of manual valves or plugs. A wide variety of low-point sensors are available with varying functionality. Selection of sensor type is often dependent upon transported media. The two most common sensors are conductivity probes and float switch adapters
Features/Benefits:
- Simplified system engineering
- Cost effective installation
- Automated detection process for buried applications
- Locates leaks within a zone or sector of a system
- Probes are generally tied-in at a central alarm location
- Can be used with Duo-Pro®, Poly-Flo®, Fluid-Lok®, or Pro-Lock® Systems
PAL-AT System
Continuous Leak Detection Sensing Cable offers the most accurate method of leak detection. Sensor Cable Systems are capable of locating multiple leaks without loss of accuracy and sensitivity. Leak locations can be determined to within 5 feet of source. Sensor cables utilize Time Domain Reflectometry technology as the basis of leak detection. The technology operates similar to radar. Thousands of times each minute, safe energy pulses are sent out on the sensor cables. As these energy pulses travel down the cable, reflections are returned to the monitoring unit and a «map» of the reflected energy from the cable is stored in memory. The presence of liquids on the sensor cable, in sufficient quantities to «wet» the cable, will alter its electrical properties. This alteration will cause a change of the reflection at that location. The alteration is then used to determine the location of a potential leak to within five feet.
Ideal Applications Include:
Continuous leak detection sensing cable offers the most accurate method of leak detection. Sensor cable systems are capable of locating multiple leaks without loss of accuracy and sensitivity.
Features/Benefits:
- Requires engineered location of access ports.
- Requires sufficient annular space for pulling of cable; not compatible with Poly-Flo®systems
- Precise automated detection ideal for buried applications
- Locates leaks within five feet of source
- Most costly leak detection option
- Cables are generally tied-in at a central alarm location
- Can be used with Duo-Pro®, Fluid-Lok®, or Pro-Lock® Systems