hose for belly press

[BobDavis88 at aol.com]

Fire hose for me also. Here's my joint, cobbled together inelegantly out of  
probably way too many fittings, but it does exactly what I want, as far as  
controlling each valve individually. I just snap the hose off the spray gun  
quick-connect, and plug it onto this assembly (actually, this is the second  
press in line - thus the female connect. The first one has a male for the supply  
hose, which ends in a female. However, it shows the fire hose and fittings,  
which was the intent). I'll send a picture of the press, with another pic of 
the  valve, in the next email, as I don't remember the permissible file size. 

Bob Davis
 
 
In a message dated 9/27/2008 12:24:59 P.M. Pacific Daylight Time,  
surfdog at metrocast.net writes:

 
Thanks to Ron, Dale, and Allan  here for sharing their experiences and 
materials regarding belly press  hose.  I will see if I can find a reasonably local 
supplier for fire hose  – I hadn’t considered that aspect. 
Ouch!!  Oomph!   Urnhh!   That’s the sound of me kicking myself in the butt 
for  buying cheap crap from Home Depot for $30.  I took the hoses apart today,  
and the rubber hose had already permanently expanded to a larger diameter  
after only a couple of inflations to 40 PSI, and clearly the markings of the  
hose clamps meant it wouldn’t last long anyway.   
I can give myself a little pat  on the back though.  None of the end caps at 
any of the fittings leaked –  only the hose itself.  I did spend good money 
and didn’t chintz on those  items, and put them together very carefully with the 
Teflon tape and severe  tightening.  So, with the right hose, I think I’ll be 
in good  shape.   
Allan – should I set up a  bulls-eye across the room and get in a  little 
target practice?   None of mine shot across the room when I was testing.  Now I’m 
 disappointed.   
Will  Truitt 
 
 
From:  pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf 
Of  Allan Gilreath, RPT
Sent: Saturday, September 27, 2008 12:06  PM
To: Pianotech List
Subject: Re: hose for belly  press

Good afternoon Will,

As you've seen, firehose seems  to work best for most of us. I've pressed 
quite a few boards with mine now  and, although I keep changing other aspects of 
the design, the firehose works  great. I use pvc end caps with multiple hose 
clamps around them. On the end  that connects to the air supply we use a pvc 
end cap with a Legris bulkhead  fitting. This allows for a self-sealing 
attachment to a 4mm supply line with  tee junctions. This way we can spread up glue 
and clamp one rib at a time. The  4mm hose allows for a relatively slow fill and 
release the pressure. Another  nice thing about it is that you can even use a 
hemostat to clamp off a  section. I leave mine pressed overnight and 
connected to the compressor just  in case there are any leaks. In coming up with 
system to seal off the ends of  the hose, we actually shot a couple of the end caps 
across the shop so be  cautious with the setup. 

We got the hose as the cut-offs from a local  fire equipment supplier since 
the lengths that we need are so  short.

Hopefully this will help get you started. 

Allan
Allan  Gilreath, RPT

Will Truitt wrote:  
To the bellymen on Pianotech Forum: 
I have built a set of cauls for gluing ribs to the panel  using air pressure. 
 I discovered yesterday that the 1 ½” rubber hose  that I bought from Home 
Depot is most decidedly not ready for prime time – no  matter how much I tighten 
the hose clamps on the hose at the ends, air still  bleeds out at an alarming 
rate (easy to see when you inflate the hose and  stick the end into a pail of 
water).  After discussion by phone yesterday  with Jude Reveley, I am 
confident that the material is inadequate.   Pressure ratings aside, it simply is not 
substantial enough to resist the air  pressure.   
Jude has recommended a ribbed nitrile/PVC hose, which is  what he is using in 
his setup with good success.  I am looking for a  source for such that I can 
quickly order it online, hopefully in smaller  quantities.   
I would also consider other hose materials that our  bellymen are using with 
good success and reliability.   
Thanks in advance for anything you share 
Will Truitt 






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