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Old 02-18-2013, 09:46 PM   #1
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oil heater, pump cavitating, what to do?


I had to move the tank 3 feet further down towards ground. So, now the heater pump needs to pull fuel up 3 more feet. There was already a long distance from tank to pump. About 40 feet. The tank was at the same height as the pump. fuel got pulled up about 5 feet, over about 30, then down about 5 feet. Its been working like this for 26 years. However, I had to move tank down 3 feet. So, its now pulling up 8 feet, then over 30 feet, then down 5 feet. However, now it keeps cavitating. What to do? Last resort is to move the tank back up. Someone said a small low pressure automotive fuel pump mounted at the tank to push the fuel. This work?

tks,
paul

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Old 02-18-2013, 09:49 PM   #2
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oil heater, pump cavitating, what to do?


sorry, central home heater, diesel fuel oil.

Looking for site listing of my email address, to make sure its right, However, cant find it anywhere. <Please don't put your email address in post.>

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Old 02-18-2013, 11:09 PM   #3
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oil heater, pump cavitating, what to do?


To ans your question,no that won't work.Try running a return line from your pump to the tank and make sure the filter is replaced every year.
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Old 02-19-2013, 06:19 AM   #4
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oil heater, pump cavitating, what to do?


Length of line is too long. When the tank was at same height, the 5 foot up and 5 foot down canceled each other out.

As said by rep. Run a return lie. You'll need to add a bypass plug to the pump. Another way is to install a tiger loop at/near the burner.
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