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Wood Pellet Stove Vacuum Hose Design? What is works? What is the best?

Post in 'The Pellet Mill - Pellet and Multifuel Stoves' started by Don2222, Feb 8, 2013.

  1. Don2222

    Don2222 Minister of Fire

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    Hello

    Lately I have encountered many different types of vacuum hoses in wood pellet stoves. To my dismay, some changes or reformulations maybe resulting from cost savings are causing trouble and shutting down stoves!

    Some hoses get loose, some crack and others get brittle!

    It is amazing that such a simple product like a vacuum hose varies so much from stove to stove in not only color but resistance to heat and wear when getting brittle and cracked!

    On the other hand car vacuum hoses on american cars are the same good quality black hoses that remain unchanged in many, many years!

    The picture below shows:

    1. 4 year old Enviro vacuum hose on top shown by a red arrow.
    2. 2 month old Englander vacuum hose shown by a blue arrow.
    3. New 7/32 car vacuum hose shown by a orange arrow that is the same size as the pellet stove hoses.

    Does anyone have a preference? What is the best? What will last longer?

    Why not some High Performance Stainless Steel Vacuum hose? ?
    http://www.summitracing.com/parts/SPE-19225/

    Attached Files:

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  2. jtakeman

    jtakeman Minister of Fire

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    The red enviro hose and the englander are most likely silicon. They with stand the heat a lot better. If the bottom hose is common rubber? It won't last all that long. It isn't rated for the heat a stove inside can get to.
    smoke show likes this.
  3. Don2222

    Don2222 Minister of Fire

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    The bottom is used on car engines so it does resist heat!

    What about some Hi-Perf 304 ss to pimp your stove?
    http://www.summitracing.com/parts/SPE-19225/

    7/32 inch is equal to 5.56 MM so 6MM might work well

    Or
    Extruded High Temp Clear Silicon Hose so you can see if it is clean?
    http://www.hps-siliconehoses.com/hp...mm-turbo-intake-manifold.html#!prettyPhoto/0/
    • Temperature Range : -65°F to 350°F (177°C)
    • Made of Premium grade Silicone
    • Heavy wall design gives it the ability to handle extreme pressure
    • Ultra flexible & Excellent tensile strength

    Attached Files:

  4. smwilliamson

    smwilliamson Minister of Fire

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    silicon hose works best but it really depends on where the reading is taken from. Englander is plagued with brittle and cracked hoses on the combustion side...there really should be a silicon hose there. In speaking of Englanders, I have found that the high temps which cause brittleness and cracking often have a lot to do with very high exhaust temps which is usually a sign of poor room air circulation...setting your blower too low for the heat range or cluttering up yer blower with a sweater full of lint.
  5. Don2222

    Don2222 Minister of Fire

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    Hi Scott
    Thanks for your input but I have a customer with 2 25-PDVCs. One that is 2 months old with the worst cracked combustion hose I have ever seen. The other stove is 6 years old and the same hose is perfectly good! Therefore, I am forced to find a hose supplier that works as good as their old hoses did!
  6. Don2222

    Don2222 Minister of Fire

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    Hello

    Thanks Guys, the order is in! From now on, I am ONLY using HIGH performance High temperature Thick Wall vacuum hoses from HPS. I will NOT use watered down OEM hoses with lower quality cost formulations that plague many new pellet stoves!
  7. jtakeman

    jtakeman Minister of Fire

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    Auto vacuum tubing is only rated for 257::F if that's what you wanna run with! Pretty sure the silicon is over 350::F

    Attached Files:

  8. johnny1720

    johnny1720 Member

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    just an fyi the type of hose is considered a safety, it is selected by the manufacturer so that if the stove gets to hot it melts and stops the pellet feed.
  9. Don2222

    Don2222 Minister of Fire

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    Hi Jay

    Thanks for the info, I knew I could do better than the auto vacuum hose, so I am going with the 350 Deg F HPS. Also the clear silicone hose will make it easy to see if it is clean!

    Thanks again I just think we solved a very important issue! When I get the High Temp Clear stuff I will post a pic! I will install it on the stoves I am rebuilding!

    Reminds me of the good ole days when I raced at the drags and found better HP parts for my car. :)
  10. turbosporsche

    turbosporsche Member

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    The stoves come with a high temp limit switch it would be a shitty design for an engineer put a part in that would fail befor the stoves high limit switch was reached. If that was the case y not use a plastic straw. That would be like auto manufactures like ford and dodge putting a plastic straw for a radiator hose as a safety befor the cars over heat temp would come on.
    You must be a safety inspector for a government job.

    I say use the high temp hose. You will be fine
  11. johnny1720

    johnny1720 Member

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    And why do you think they stopped using copper or simply putting the vacuum switch directly inline with where ever they are drawing the vacuum?
  12. smwilliamson

    smwilliamson Minister of Fire

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    Prolly cause copper costs a lot of money x 100,000 stoves
  13. Don2222

    Don2222 Minister of Fire

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    Hello

    Also copper is very rigid. The vibration of an exhaust fan could easily break the copper seal. I will be testing the clear thick wall hi temp silicon hoses in my rebuilds and even in my own stove. If it lasts and does not crack then it's a winner!
  14. heat seeker

    heat seeker Minister of Fire

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    Plastic tubing is also much quicker to attach in the factory. Time = $.
  15. Don2222

    Don2222 Minister of Fire

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    Hello

    I just got the High Performance Silicon Thick Wall vacuum hose and it is really good stuff!

    I was working on a Baby CountrySide stove today and replaced the hose that was getting hard and also a tad loose where it goes into the back of the firebox. I asked the owner if she had any problems and she said yes, it would shut down for no reason sometimes! I said this will fix it!

    See pic below
    click to Enlarge:

    Attached Files:

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