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3. THE TANK ASSEMBLY UNIT: Sereval types are available to suit steel <br /> and fiberglass tanks of various manufacutrer>. All tank assembly nits <br /> consist of a one piece coil of— i4" O. D. tubing, factory converted to -an <br /> air bell , complete with tank entrance fittings for 2" NPT opening far <br /> steel tanks and 4" NFT opening for fiberglass tanks. Refer to tan - <br /> assembly unit bulletin for instructions. <br /> IMPORTANT: An equalizing unit must also be used if the annular space <br /> between the tank walls is not 100% vented to atmosphere. <br /> 4. THE EQUALIZING UNIT: Consists of a one piece coil of 3/16" 0. ). <br /> tubing complete with tank entrance fittings. Refer to equalizing Anit <br /> bulletin. <br /> 1 <br /> i <br /> i <br /> 2 <br /> ' L <br />