WTF is this? - Page 4 - SailNet Community
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post #31 of 55 Old 10-01-2013 Thread Starter
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Re: WTF is this?

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Originally Posted by ottos View Post
OK the large component is a piezo buzzer - I think it is - (PKB6-5A0)

Is there a connection from the other side of the rheostat? I can't see one. There is also a small Motorolla component which I can't identify.

Anyway FWIW - holding tank alarm seems very likely based on your observations of where the wire goes. The button is probably a temporary reset of the alarm.

Take a close look at the red wire from the rheostat. It appears very close to shorting out against the fuse terminal...
The rheostat has only the one connection and I suspect that it simply controls the alarm volume. The angle of the picture makes it look like the red wire is close to contacting the fuse, it isn't. Could there be an electrical pump in the tank that pumps the waste out when the valves are configured for such? Is there such a device? I understand why there is an alarm, you cannot see how full the tank is. Flipping the switch on the fuse panel marked "Holding Tank" and then pressing the button does nothing. I sealed the boat up so that it was quiet and could not detect any evidence of a pump operating when the button is pushed. Could be that it is simply non-operational at this point...

Last edited by ericb760; 10-01-2013 at 01:04 PM.
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post #32 of 55 Old 10-01-2013
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Re: WTF is this?

With only one connection, a rheostat isn't doing anything.....
It may be that the box was reconfigured at some point, and it was left in.
As far as 'could there be' questions...there are others here far more familiar with common and uncommon practices who could give better advice.

You may just have to fill the holding tank to see what happens.....
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post #33 of 55 Old 10-01-2013
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Re: WTF is this?

So you've just spent a couple days on your hands and knees to track a non-functional device that you could only see by standing on your head, in the head.
Welcome to the world of "Yachting".
Sometimes when you find something that doesn't seem to do anything, you should just ignore it for awhile.
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post #34 of 55 Old 10-01-2013 Thread Starter
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Re: WTF is this?

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So you've just spent a couple days on your hands and knees to track a non-functional device that you could only see by standing on your head, in the head.
Welcome to the world of "Yachting".
Sometimes when you find something that doesn't seem to do anything, you should just ignore it for awhile.
Well, that's just, like, your opinion, man...Just kidding, I hear you! But, c'mon, a black box with a red button? Who could resist?
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post #35 of 55 Old 10-01-2013
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Re: WTF is this?

I know, I'm sorry, this could be considered one of those previous owners "stupid tricks", as a man-trap all it lacked was a label saying "Do not press red button" and a tag saying "Do not remove tag under penalty of law".

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post #36 of 55 Old 10-01-2013
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Re: WTF is this?

Pressing the red button activates the glow plug in the lower holding tank.Releasing the button activates the piezo spark igniter and empties the tank .only works when tank is nearly full. I'm surprised it wasn't labeled .
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post #37 of 55 Old 10-02-2013 Thread Starter
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Re: WTF is this?

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Pressing the red button activates the glow plug in the lower holding tank.Releasing the button activates the piezo spark igniter and empties the tank .only works when tank is nearly full. I'm surprised it wasn't labeled .
Is this a stab in the dark or do you have experience with systems such as this? If it's the latter, please tell me more...
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post #38 of 55 Old 10-02-2013
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Re: WTF is this?

Eric, I'll tell you what I believe would happen in the scenario above. The glow plug would warm the space, causing more methane to be emitted. Then the "piezo spark igniter" causes an explosion. The tank is "empited", but it won't really be able to be refilled.

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post #39 of 55 Old 10-02-2013
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Re: WTF is this?

Did you check to see if you had a small "super soaker looking" through-hull near your deck on the port side? I imagine that this boat was raced, and if so spraying poo all over your competitor is far more fun in a crossing situation than yelling "starboard!".
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post #40 of 55 Old 10-02-2013
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Re: WTF is this?

Sorry my flatulent explanation went right over your head. My real area of expertise is filling the bowl and discharging the vacu san system . On the ships I was known as the "turd technician'
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