Something like that, a SS unit if you can find it.
-----Original
Message-----
From: Cliff Redus <cliffordredus@sbcglobal.net>
To:
personal_submersibles@psubs.org
Sent: Wed, Mar 10, 2010 11:28
am
Subject: Re: [PSUBS-MAILIST] MBT Vents
Vance
Thanks for the correction on the VBT on the DW 2000. I
missed this or forgot it (sad to get old!). I concur that the
hand pump to blow the tank and the free flood to fill again is a
very simple and elegant way to add the VBT. I wonder if they use
this VBT option for trimming in every day operations. At the
convention, they trimmed manually by adding and taking out lead
ballast. Do you know what kind of hand pump they use for the
VBT? Is it a small hydraulic hand pump like a Hydraforce
HP-10-21
http://www.hydraforce.com/Acc-hous/Handpump.htm? I use
one of these pumps on my boat for dropping the emergency
weight.
Cliff