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Seaward Powertest 1557 Multi Function installation Tester Seaward 328A910, Which Seaward PAT tester is best for you Help me decideThe Seaward PowerTest 1557 is a multi function installation tester with integral probe, allowing the instrument to be held and the results to be read at the same time. Seaward 328A910 Powertest 1557
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