Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit

-0.51 bar (-15 Hg) to -0.21 bar (-6.2 Hg) vacuum drop & thanks

belham Member Posts: 32
edited February 2018 in Oil Heating
Hi all,

Just wanted to come on & say thank you to everyone who responded to my previous threads. We had a bit of break in the weather today (went above zero, yippee!), so I went out & decided to see if I could do something about the horrible vacuum readings I'd been having, along with nozzle drip.

I think the pics say it all. I dug a partial trench out on the existing lines (I'm still replacing them when warm weather arrives) so I could get wiggle room on the lines to disconnect the Afriso Miniflex on top of my underground tank. Once I did that, I pulled the Afriso out, and was shocked. The so-called mazout technician who installed this system in it & the underground lines (for previous owner) somehow saw it as correct to let the hanging NBR 9mm ID hose-suction line lay with over 2 foot of length on the bottom of my 3000l underground tank. To say it was gunked & nearly 100% clogged up, along with parts of my suction line coming from the top of the tank, is/was an understatement. We bought the house in 2005, and for 13 years it has existed this way & continued to get worse. Think about that, 13 years, with over 2 ft of suction lying on the bottom of a 3000L tank & sucking up everything left & right, man, we were fortunate. I think things only survived because of the testament to the heartiness and robustness of the Weishaupt oil burner I have. True to German legend, this burner model lives up to its nickname (in German, they call--translated--The Indestructible).

Anyhow, here's the pics & what I did, and also pics of what the new reading of the vacuum is at rest (-0.075 bar2.2 HG) and when the Weishaupt is running (-0.21 bar, 6.2 Hg) and a few pics of my underground tank, lines, manhole cover area & also my two cast iron boilers in the utility room with the Weishaupt on one (the right side one).

Thank you everyone again!



    EBEBRATT-Ed Member Posts: 8,555
    @belham , that's great news. Good detective work. Maybe you don't have to replace the oil lines after all.

    Hopefully this will fix your nozzle after drip.

    Let us know!!
Sign In or Register to comment.


It looks like you're new here. If you want to get involved, click one of these buttons!