I would agree to Parkers trend to rusting. They rust upside down when installed south of the the equator too. Not that it relates to manufacturers, But I'd also point out my newest hate - the growing trend of techs not bothering to wrap wet rags or do whatever to protect below a weld and cook the crap out of the paint on said items these days, a year or so later its rusted out. Flamming lazy punks. EG nice unburnt welds on your replacement bloke. Seen a reversing valve done by an apprentice the other day, cooked beyond survival... Stop fiddling with ya bloody phone and watch and learn next time for heavens sake.
What the heck ever happended to copper accumulators anyway? Crimp off a bit of 2 & 5/8 and fill her up with brown tip and presto.
Or... Just take enough gas out of her so she dun sweat back, prolong the suction accl corrosion time line, and then ignore cooking the paint off around your discharge. Perfect suc accl rusting preventative maintenance slash superheat tweaking procedure.
As for lennox not installing them, my bet is on material savings and hoping to hell the system never floods back - over longevity design consideration.
