Sonny wrote:
Almost all of my air couplings leak lots of air. I bought them from
Harbor Freight and Home Depot. Is there any way to tight them, so
that sir doesn't leak? If not, can you recommend a brand that fits
together properly. This air leakage is driving me crazy.

I bought all of mine (about a dozen fittings altogether) at HF and none
leak noticably.

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/