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Announcements


Vapor Pin and our Europe distributor Ribble-Enviro will be exhibiting at the
Ground Gas 2018: Assessing and managing ground gas risk
Date: 01 March 2018 - Venue: Holiday Inn London - Kensington High Street, London, Wrights Lane W8 5SP
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Enjoyed listening to Tony McDonald with AZ solutions talk about pilot test at the Southeastern States VI Symposium. ... See MoreSee Less

Soil Gas Control Systems in New Construction (CC-1000). This new standard addresses RRNC construction for virtually
every building that is larger than a one- and two-family
dwelling. https://aarst-nrpp.com/wp/store/rrnc-for-larger-buildings-cc-1000/
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Great seeing everyone at last night's MSECA event. ... See MoreSee Less

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Any CSIA applications in vapor intrusion issues yet? Yes..Tom McHugh published ESTCP report ER-201025 which addresses CSIA for vapor intrusion. McHugh reported that CSIA could be effective in distinguishing between interior and subsurface vapor sources, but it often leads to inconclusive results and might be unsuitable at 50% of sites. Our experience with CSIA in groundwater has been inconclusive, so we continue to use indoor air/subslab ratios and other more conventional lines of evidence to distinguish between VI and background sources. ... See MoreSee Less

CYBER MONDAY SALE - Today only 10% off with Coupon Code VPCBRR ... See MoreSee Less

Vapor Pin Brazil is nearing fruition. Within the month we will be able to start accepting orders on our Brazil website and shipping vapor pins made in Brazil and from our Brazil fulfilment center. ... See MoreSee Less

In cooperation with the American Institute of Professional Geologists (AIPG), Ohio Section, Cox-Colvin and others are participating in a 2-day course on vapor intrusion on October 24 and 25, 2017 in Delaware, Ohio. ... See MoreSee Less

A Wonderful Testimonal and a wonderful conference! ... See MoreSee Less

Main Content

Pressure Field Extension Testing


Using Vapor Pins® for Pressure Field Extension Testing
Vapor Pins® are widely used for Pressure Field Extension (PFE) tests of radon and vapor-mitigation systems. The PFE test (also called a “Suction Field Extension Test” or “Communication Test”) ensures that a sub-slab depressurization (SSD) system creates sufficient vacuum everywhere beneath a floor. PFE testing is essential for proper system design and installation, and periodic testing in subsequent years verifies that the SSD continues to operate within specified limits. A common approach to measuring subslab vacuum is to drill a hole in the slab, jam a manometer into the hole, and take a reading, while running a radon fan or shop vacuum at the suction pit. Unfortunately, it can be difficult to form a tight seal between the manometer and the slab, and the test hole cannot be left open for subsequent testing.

A better approach for PFE testing is to measure the sub-slab vacuum through a Vapor Pin®. The Vapor Pin® provides a tight seal against the slab, and with the Vapor Pin® Cap in place, prevents the loss of soil gas to indoor air. The Vapor Pin® can be left in place indefinitely for subsequent measurements, or removed and reused elsewhere. For radon testing, the Vapor Pin® can be reused by simply cutting off and replacing the silicone sleeve between holes. For vapor-intrusion use, the Vapor Pin® should also be decontaminated before moving it to a different location.

For conducting PFE tests during pilot testing, the Vapor Pin® can be installed in the stick-up configuration, which requires drilling a 5/8-inch diameter hole in the slab. If the Vapor Pin® will be left in place for subsequent testing, it is typically installed in the flush-mount configuration, so that it doesn’t pose a trip hazard. The flush-mount installation requires drilling a 1-1/2 diameter inch hole and a 5/8-inch diameter hole. The flush-mount Vapor Pin® may be covered with Cox-Colvin’s stainless steel Secured Cover, which reduces the risk of tampering, or a black plastic Flush Mount Cover, which is more economical. We recommend using brass Vapor Pins® for one-time use, such as pilot testing, and stainless steel Vapor Pins® if points will be left in place for subsequent testing.

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