Case Studies

Grease/Water Separator

Sapulpa, OK

Project Scope

Install a flexible membrane liner in a concrete pit that is designed to separate grease from waste water at a large glass manufacturing facility.


Having been in use for years, the pit’s concrete was saturated with oil and grease. Due to this, an applied coating would not adhere properly. Furthermore, being located in an area subject to earthquakes, there were concerns about the integrity of the pit in the event of an earthquake. There were also doubts about the ability of a coating to bridge cracks that might occur in the concrete


The pit was emptied and steam cleaned to make it suitable for entry and installation of a flexible membrane liner. Geo-synthetic padding was fastened to the bottom and sidewalls of the pit. The padding helps to prevent any sharp areas of the pit or loose debris from puncturing the liner. Witt Lining Systems fabricated a membrane liner in two pieces. With the two pieces positioned into place, the liner was field welded together by factory installers.


Installation of the padding and liner was completed over 2 days. Upon completion, the pit was returned to service. The finished liner is expected to provide years of worry-free service in the separator pit.

2211 E.L. Anderson Blvd.
Claremore, OK 74017


Mailing Address:
P.O. Box 488
Claremore, OK 74018-0488

Phone: (918) 342-0083
Toll Free: (800) 323-3335
Fax: (918) 342-3932

Since 1972 we have been the industry leader in providing flexible PVC corrosion resistant liners. Flexible liners are a cost effective alternative to bonded Linings and coatings. Flexible PVC liners are used in plating tanks, chemical tanks, storage tanks, waste water treatment pits, secondary containment, cooling towers, pits, sumps, solar heated water storage tanks, or anywhere liquid containment or corrosion protection is desired.

Industries served include metal finishing, plating, anodizing, aerospace, oil and gas, mining, municipal water treatment, and food and agriculture. Witt offers a variety of materials such as Koroseal®, Spectra Blue® and Exceline®.  Witt Lining Systems also offers alternatives to PVC, custom fabricating Teflon® , Kynar® PVDF , and XR-5® liners. Wiitt offers a variety of liner grades and thicknesses to suit your lining need.  Links

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