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$5.39
Becker U4.20 pump sealed properly with this copper sealing ring. It measures 21.75 mm outer diameter, 16.4 mm inner diameter, and 1.3 mm thick. Made from soft copper that compresses to form a tight, leak-proof seal. Designed specifically for the Becker U4.20 pump. A small but critical part.
This Sealing ring with material copper having size 21.75 x 16.4 x 1.3 mm is used on Becker brand and U Series family and Used pump models U4.20.
This is a copper sealing ring (Part # 300091). It is a flat ring made of soft copper. The size is 21.75 mm across the outside, 16.4 mm through the hole, and 1.3 mm thick This exact same copper ring (300091) is also part of the Becker Seal & Gasket Kit (Part# 54900040300) for the U4.20, and that kit includes one of these rings .This copper sealing ring (300091) is listed as item #1 in the Seal & Gasket Kit for the U4.20 (Part# 54900040300) . If you are taking apart your U4.20 for service, it is smart to replace this ring while you have the pump open. Even if it looks okay, copper rings can lose their softness after being compressed many times.
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