SWITCH, VACUUM 1.5 HG Pacific Bay Equipment Sale! from $38.50 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Normally open (NO) switch closes when pump vacuum beginsdrawing water and opens when vacuum is broken due to pumpshutdown or empty water tank. Temperature Max: 140°F Heavy-duty, 16 Amp Contacts 1/4" FPT Connect 1.5" (HG) Vac Switch