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This video will help you with the correct installation of your new diaphragm and vane seal on your JS Series pump. Gould’s customer service is a nightmare to try to get on the telephone, but I got lucky this morning and actually spoke to a live person who was very helpful. This video should work for all JS Series pumps. The J5SH pump shown in this video is the 1/2 horsepower high pressure version of the J5S.