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Posted by Harold hydronicnetwork.net on January 03, 2004 at 10:00:37:
In Reply to: Re: banging posted by eburke on January 03, 2004 at 09:12:33:
A cheap ball valve or gas cock is a quick test tool; but somewhat difficult to set and takes some time to get it set right.
You might try a vertical adjustable radiator vent. It would be small for a main when wide open; but might carry the load.
http://www.heat-timer.com/?page=varivalve
http://www.sidharvey.com/public/new_products.htm
(bottom)
You could use a B&G 1A on a reducer elbow on a nipple from the main also.
http://www.hoffmanspecialty.com/pdf/hs900/HS900-1A4070A.pdf