i've seen some oil tanks have one line and others have two....on my furnace it has lines for 1&2....what is the difference between 1 &2 lines. is it better to run 1 or the 2 line method?
2007-02-18 06:05:14 · 4 answers · asked by deewill153 1 in Home & Garden ➔ Do It Yourself (DIY)
A 1 pipe system is usually for shorter runs. It DOES NOT have to be gravity feed. That depends on the pump. It can lift vertically.
On a 2 pipe system, 1 pipe is for suction and 1 pipe is a return line back to the tank. Usually used for long pipe runs or when tank is underground. A 2 pipe system is self bleeding. A 1 pipe system must have air bled out through a bleed screw on the pump.
If the tank is in the basement or above grade outside, a 1 pipe system is sufficient.
If the tank is underground or is very far from the house (rare), then use a 2 pipe system.
If a 2 pipe system is used, a bypass setscrew is usually inserted into the bypass port before installation.
2007-02-18 13:17:01 · answer #1 · answered by Obsean 5 · 0⤊ 0⤋
I have a question about where a oil fuel line should be placed. We have 2 lines -one is to the furnace and the other goes to the hot water heater. Both lines run in the ceiling to the oil tank. Eight years ago, the company we had, replaced the furnace and put the lines in the ceiling. The original furnace from 1955 had the lines on the floor. Now we are having issues with oil reaching the furnace and parts failing. We have been told it is because of the lines in the ceiling. Our new oil company ( of 2 years) wants to put the lines back on the ground. What do you think?
2015-01-16 16:00:48 · answer #2 · answered by mary 1 · 0⤊ 0⤋
The one line system is a gravity feed system where the oil tank is no more 8 feet above the feed inlet on the furnace.
The two line system relies on the furnace pump to pump fuel oil from the tank. Any fuel that is not needed, or burned, is returned to the tank through the second line, i.e. the return line.
If you go to page 10 of the fuel oil installation instructions on the attached link, it really gets into the nitty gritty.
2007-02-18 06:27:15 · answer #3 · answered by Bare B 6 · 1⤊ 0⤋
Some systems have, either a long run or a high rise. A single stage pump has trouble pulling long a long distance or high elevation. Two pipe systems alleviate that problem.
2007-02-18 07:07:05 · answer #4 · answered by buzzwaltz 4 · 0⤊ 0⤋