replacement watts washing machine shut-off doesn't fit

I am replacing a Watts single lever laundry shut-off valve that leaks at the lever. The replacement unit is Watts SKU# 0006644.
The problem is the I want to use the sweated on elbows from the old one and the recess where they fit into the unit with an O-ring are different on the new one so it does not seal tight.
I did install it using a fiber washer and the o-ring and tightened the h_ll out of it. I am not sire that will hold up...
Does anyone have another solution for using the replacement shut-off with the old elbows?
Thanks! Jim
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snipped-for-privacy@ptd.net wrote:

Yeah, the original was made here but the new pattern is Chinese (or maybe Taiwan) and they don't *quite* fit. Your jury rig will probably hold OK. At the worst, it may start to leak a little, but I don't think it will blow apart...
Jim (the other Speed)
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