<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> 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: <blockquote cite="mid:000301c92092$64bfb850$2e3f28f0$@net" type="cite"> <meta http-equiv="Content-Type" content="text/html; "> <meta name="Generator" content="Microsoft Word 12 (filtered medium)"> <style>  </style>  <div class="Section1"> To the bellymen on Pianotech Forum:<o:p></o:p> <o:p> </o:p> 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.  <o:p></o:p> <o:p> </o:p> 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.  <o:p></o:p> <o:p> </o:p> I would also consider other hose materials that our bellymen are using with good success and reliability.  <o:p></o:p> <o:p> </o:p> Thanks in advance for anything you share<o:p></o:p> <o:p> </o:p> Will Truitt<o:p></o:p> <o:p> </o:p> <o:p> </o:p> </div> </blockquote> </body> </html>