This is the Edwards Ballast Gasket. Part number 27159615. It seals the gas ballast valve on your E1/E2M series vacuum pump . If your pump is losing vacuum or hissing, this small gasket might be the problem. Replace it to stop air leaks.
This is the Edwards Gasket. Part number 27159438. It is used on EH Booster and QMB Blower pumps . Specifically designed for the EH250, EH500, QMB250, and QMB500 models . If you are servicing your booster pump, this gasket is essential for a proper seal.
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