Cap for return line

DART66GT said

Who makes a fuelproof cap for my 1/4 inch return nipple on my sending unit. Don't want to do bolt plug in line.

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Hello DART66GT,
You can buy this at Auto Zone type stores.
Simple wire tie to hold it in place.
Dorman Products 47388 Vacuum Cap Assortment for sale online | eBay
Happy Mopar :)
Arron