May I suggest a long term fix for you, Doug? I would look into installing the same threaded fittings that your pump has and then installing the same brass valves that the AF bypass kits use. That way your valves will be up in the heated area and only "empty" lines will run outside. Although installation in the space you have will be patience testing, the valves are very compact, require only 1/4 turn to open and will be easy to open and close in the tight quarters.
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-Rich-
"If the women don't find you handsome, they should at least find you handy." - Red Green
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