Please take note. This blog is in the process of moving to a new platform (WordPress) for many reasons (easier to publish being one).

The URL of the new blog platform is

At the URL, you will find recent updates, and how to follow using Facebook, Instagram or Twitter.

The plan is to provide timely, more detailed, project information as it happens.

In the future, this address will redirect to the new URL and the original content will be removed.

Monday, July 26, 2010

Propane System is IN!

We finished installing the propane system this last weekend. All power/pressure/leak tested. I'll let the slideshow below speak for itself, but I will bullet some details here:

  • supports two 10 lb propane tanks, steel or aluminum.
  • two stage regulator (provides for more consistent gas pressure at the stove)
  • auto-changeover switch in the regulator. When one tank goes empty, it automatically switches over to the second via a pressure activated mechanical switch.
  • 24 VDC solenoid valve
  • 3/8 inch primary feed hose to the (future) galley stove
  • second output hose (1/4 inch)  for (future) pulpit mounted BBQ, with its own shutoff valve.

Construction Details
  • tank locker built from fiberglass tubing, coosa board, glass and epoxy (similar to the dive tank locker construction)
  • space between the tubes is walled in and sealed to serve as the regulator box. All hoses/wiring go into this center box. All thru-wall ports are vapor tight.
  • With the dive tank locker experience, I changed the design to simplify the construction a bit and made fewer mistakes this time.
  • the side deck location is too narrow for a standard 20 lb tank, so it was split into two 10 lb tanks. A reasonable compromise I think. 10lb tanks, while less common than 20lb tanks, are easily found. There was just enough room to use fiberglass tubing big enough for the larger diameter aluminum tank
  • regulator assembly is mounted on UHMW slides and is designed for easy removal when the regulator needs replacing (and it WILL need replacing at some time)
  • tank assembly is thru bolted to the underside of the deck and glued/sealed with structural adhesive (Plexus)
  • waterways for drainage were routed into the base of the tube assembly reducing the number of external hose fittings.
  • feed hose and solenoid wiring runs to the galley through a dedicated conduit, 1.25" PVC thinwall pipe, that is installed up inside the starboard bulwark, with sweeping 90 degree elbow joints for drops at the tank and stove. Despite a run of nearly 25 feet, it is easy to snake the hose/wire through the conduit without a messenger line. Any future replacement of the hose should be relatively easy.
  • Meets ABYC construction standards (section A) for propane systems (according to my interpretation at least).
Still To Do
  • Construct the locker lid (just temporary plywood one for now). That will be done with the deck refinishing.
  • Solenoid control panel. We will probably go for one of the switch/sniffer/alarm systems. That will be done when the galley stove goes in.

No comments: