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  1. GlowWorm

    Non-Powered Liquid Level Switch

    I am currently refurbishing the 30 year old sumps in our auxiliary building sub-grade areas. The current setup is a 4 ft. diameter & 4 ft. deep well with two Gould Model 3171 Vertical Submerged Bearing Sump pumps. These came standard with a Square-D mechanical alternator switch operated by a...
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