This is the Poly-Mart 4" Standard Bulkhead Fitting.
These fittings are available in various sizes including 3/4" , 1" , 1 1/2" , 2" , 3" and 4" . All Poly-Mart Tanks include a standard sized Bulkhead Fittings which vary in size and quantity depending on the capacity and style of the tank you select. This flanged fitting is installed from the inside of the tank. The flanged fitting and the EPDM Gasket stay on the inside of the tank while the Plastic Washer and Nut stay on the outside of the Tank. These fittings are reverse NPT threaded on the outside threads and standard NPT threaded on the inside. All fittings are named by their inside measurement.
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Poly-Mart Warranty Details:
Poly-Mart carries a 5-year limited warranty from the manufacture date. The warranty covers manufacturer defects. Poly-Mart is liable for the value of the tank itself and specifically excludes the cost of labor for installation and/or removal of personal property. We are also not liable for personal/property damages. Poly-Mart is not liable for tank failure if the tank is damaged by the customer. Poly-Mart water tanks are for water applications only. Painting or any other structural changes made to the tank voids the warranty. For our complete 5-year limited warranty details, please click this link