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Knock box bar
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ozzie
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Joined: 23 Jun 2004
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Posted Sat Mar 29, 2014, 2:53pm
Subject: Knock box bar
 

Anyone have a lead on where to buy the rubber tubing for the steel bar on a knock box? Thanks Ozzie
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dana_leighton
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dana_leighton
Joined: 11 Jan 2002
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Espresso: Isomac Relax; Caferina...
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Posted Sat Mar 29, 2014, 2:58pm
Subject: Re: Knock box bar
 

When mine needed replacing, I went to the local hardware store and got a piece of nylon tubing with an ID the right size. It's clear, but that doesn't bother me. It is also much more durable than rubber and still protects the basket from the metal bar.

 
Dana Leighton - Espresso hack and CoffeeGeek moderator
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skydragondave
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Joined: 18 Feb 2013
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Location: Ontario, Canada
Expertise: Professional

Espresso: Commercial Only
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Posted Sat Mar 29, 2014, 4:32pm
Subject: Re: Knock box bar
 

You can also go to a specialty hydraulics shop and request the correct ID hydraulic suction hose, it is reinforced with nylon braiding to prevent it collapsing when drawing high volume or velocity. Some mfrs of knockboxes use this hose off the hop, and leave the white ink markings right on it to give you the specs.
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calblacksmith
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calblacksmith
Joined: 25 Nov 2007
Posts: 7,722
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
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Vac Pot: 40s era Silex
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Roaster: gave it a try, decided no
Posted Sun Mar 30, 2014, 5:00am
Subject: Re: Knock box bar
 

Like they said, just find a hose that fits your bar and you are set, it isn't like it is going to the moon or anything :D

 
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Wayne P.
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JGG
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JGG
Joined: 31 Mar 2006
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Location: Kentucky, US
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Espresso: PID Silvia; PID Alexia
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Roaster: Hottop D w/HTC+TC4C
Posted Mon Mar 31, 2014, 1:54pm
Subject: Re: Knock box bar
 

dana_leighton Said:

When mine needed replacing, I went to the local hardware store and got a piece of nylon tubing with an ID the right size....It is also much more durable than rubber and still protects the basket from the metal bar.

Posted March 29, 2014 link

+1

OEM rubber tube lasted 1 year, tops. Vinyl going strong 5 years and counting. Mine is black and came from Lowes.  Don't use rubber.

Jim
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