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**IT Cowboy** · 03-09-2025, 05:00 PM

My 72 has a mechanical pump with a return line. If I put a pressure regulator on the feed line to the carb will the pump handle the "back pressure" or do I need to plumb in a return T from the carb supply line to the pump return line and put a check valve in there too. I think my return is 3/8

03-09-2025, 05:00 PM	#35
IT Cowboy Senior Member Join Date: Jan 2025 Location: Clarkdale, Arizona in a van down by the river Posts: 287	Re: Leaking Fuel Pump Diaphragm? My 72 has a mechanical pump with a return line. If I put a pressure regulator on the feed line to the carb will the pump handle the "back pressure" or do I need to plumb in a return T from the carb supply line to the pump return line and put a check valve in there too. I think my return is 3/8 __________________ 1972 C10 Custom Deluxe Highlander 402 2019 Toyota Tundra SR5 2018 Jeep Wrangler Sport Freedom isn't safe, it requires you to take responsibility for your own life, your own safety, and your own success. It carries with it the possibility of failure and the understanding that you're working without out a safety net. If you give the state the responsibility for any of these you also give up the freedom that accompanies the responsibility.