Vacuum Switch

[78Chev]

Dr. Lee.
I replaced my mechanical vacuum pump with an electric one out of a volvo. The mechanical one was ticking which drove me crazy. (Even a new one made noise; I put a stub in place of the standard one.) The electric pump works great, but I want to control it with a vacuum switch so that it turns on if the vacuum in the resevoir falls below about -18 inches Hg, and shuts off at about -22 inches. Do you know where I can find such a switch? Asking NAPA returns blank stares as they seem to always need a make, model, engine, and year to find anything. Thanks!
Randy

[Turbine Doc]

78 Chev,

I just did a google search typed in vaccum switch over 20 pages popped up, you might want to do same should be one in the list that fits your need also check out Grainger catalog or McMaster Carr they carry a lot of that type stuff as well

[jbplock]

78 Chev,

I looked into pressure and vacuum switches a while back found that Hobbs makes several models. (Click Here) (http://content.honeywell.com/sensing/hss/hobbscorp/catswitch6.asp)
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[78Chev]

Thanks. The Hobbs looks like the ticket. I'll give them a call today.
Randy