Macerator hose length

Discussion in 'Motorhome Chat' started by Bryan, Nov 13, 2010.

  1. Bryan

    Bryan Read Only Funster

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    How far can the flojet RV macerator pump it's contents using 1" corrugated hose (not layflat)?

    I have 25 metres but thinking of getting more but don't want to waste my money if the pump can't handle it.

    TIA

    Bryan
     
  2. Jim

    Jim Ringleader

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    I have 4 x 25m lengths i bought from Duncan, I have used 3 together no problem, but gravity was helping a bit.

    I have got a spare 25m of unused roll flat, complete with fitted clips, yours for £25:Smile:
     
  3. Bryan

    Bryan Read Only Funster

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    Can you attach/send me a pic of the clips so I can see if they are the same as mine :Smile:?
     
  4. Jim

    Jim Ringleader

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    I can, but they will be:Smile:
     
  5. Pammy

    Pammy Read Only Funster

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    You dont have to pump it home Bryan, they have dumps in Spain:RollEyes:
    Ps IMHO lay flat of any legth will reduce the distace you might get with round hose
    100 meters is the max me thinks with round house But please remember when your tote is full, you still have a 100 meters worth in yer pipe:Rofl1::Rofl1:
     
  6. Johns_Cross_Motorhomes

    Johns_Cross_Motorhomes Trader - Motorhome & Accessory Sales

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    100 metres = 3940 inches x 1 inch = The result is 44.61 gallons [gal][imperial] left in the pipe ...............................:cry::cry::cry:



    http://www.smartconversion.com/unit_calculation/Volume_of_a_Cylinder.aspx



    Pssst! Seen This 'Thanks' Button?
     
  7. pappajohn

    pappajohn Funster Life Member

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    thats a lot of sh^t in a tube:Eeek: 196 liters.

    or another way to see it.....less than two full hoses to empty from full :Rofl1:
     
  8. pappajohn

    pappajohn Funster Life Member

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    :Rofl1::Rofl1::Rofl1:
     
  9. scotjimland

    scotjimland Funster Life Member

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    think you made a cock up Peter.. I make it 11.14 gal
     
  10. pappajohn

    pappajohn Funster Life Member

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    i made it 3.91 galls but i checked again and peters calculator shows the last digits only in the bottom box :Doh:

    peter is right.... 43.1908609045052 gallon
     
  11. pappajohn

    pappajohn Funster Life Member

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    :Doh: you are right Jim :Blush:(almost)
    just done it again using CUBIC inchs :Doh:

    14.19150701 gallons.
     
  12. scotjimland

    scotjimland Funster Life Member

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    tried again

    using 12.5mm radius

    and 100 mt length ( height )

    = 10.79 imp gals
     
  13. olley

    olley Funster

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    Well I just went outside and filled 100m of 1" hose with water and emptied it into a bucket, and I make it 11.154 gallons give or take a drop.

    I am flipping freezing going indoors now. :BigGrin:

    Olley
     
  14. Landy lover

    Landy lover Funster

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    Olley

    That is what they call dedication to a cause :Rofl1::Rofl1:
     
  15. olley

    olley Funster

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    No, thats what they call bu**shite :Rofl1:

    3.1415x.5x.5x3937.0078-277.4195=11.145 gallons of shite

    Area of a circle is Pi r2
    Inches in 100 metre=3937.0078
    An imperial gallon=277.419547 cubic inches

    oop's looks like I transposed the 4 and the 5 in the last post. :Blush:

    Olley
     
  16. Geo

    Geo Trader - Funster

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    None of you so called mathmaticians have asked
    Is the pipe internaly smooth or ribbed:Blush:
    and internal rib will reduce the surface area severly reducing content volume :Doh:
    Amatures:RollEyes:
     
  17. olley

    olley Funster

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    I based my calcs on layflat, no ribs :BigGrin:

    my maths teacher wouldn't have called me a mathematican, thicky is more what he would have called me. :Rofl1:

    Olley
     
  18. scotjimland

    scotjimland Funster Life Member

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    Well, if we are getting all technical ..

    the distance a macerater can pump is dependent on three factors.

    * Pump output pressure.

    * Hose Diameter.
    we have seen that a 1" hose holds aprox 10 gal , that weighs 100 lbs , a 1/2" diameter will hold much less, so for the same pump output the distance it could pump would be greater, probably nearly double that of 1"

    * Hose Type

    Smooth bore is best, it offers the least resistance to the flow.
    Convoluted offers greater resistance than smooth
    Layflat is smooth but requires pressure to open it so the pumping distance is reduced , by how much ? I will leave Olley to do the testing :Laughing:

    Summing up .. 1/2" smooth bore garden type hose will give the longest pumping distance.

    I used 30mts of 1" smooth bore, clear, reinforced, flexible nylon pipe, being able to see what was happening (or not) was a definite advantage ..
     
  19. pappajohn

    pappajohn Funster Life Member

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    100mtrs of 3" gravity fed will empty it a lot faster :Rofl1:
     
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