Replacing fuel line from bottom to top

Dadjr1253 · October 21

replaced filter and nozzle was not getting fuel valve on bottom of tank will not open. Ran 3/8s copper pipe & fittings it fired up after bleeding then quits would putting an inline filter line filter do any good? I think it’s getting air somewhere can’t get a solid stream of fuel. The tubing is flared so can I put pipe dope tape on it to help stopping the air.

HVACNUT · October 21

You ran a new fuel line out of the top of the tank, and connected to where? Did you connect to the existing oil line at the tank (after the bad valve), or did you connect at the burner somewhere? Exactly where? Pics?

Is the new oil line going straight down? How far off the bottom? Sludge?

If the flare is good, the pump should prime.

Dadjr1253 · October 22

ran the fuel line from the top of the tank to the furnace. Line goes 41 inches into tank not touching the bottom. Getting air somewhere would it help to put an inline filter and maybe some pipe dope on the fittings?

Jamie Hall · October 22

https://forum.heatinghelp.com/discussion/comment/1868743#Comment_1868743

Filter won't help at all. As to the fittings — any fittings on an oil line — particularly one running a vacuum as a top withdrawal does — must be well made flares. And, for that matter, avoided if possible.

EBEBRATT-Ed · October 22

You need Firomatic valve and an oil filter at the tank and a Firomatic at the filter to meet code. Maybe an OSV valve. If you pulling air you have a suction leak. Period

With the tubing in a vacuum you probably will not see an oil leak.

Replacing fuel line from bottom to top

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