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 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 Holding Tank		  New Topic  Topic Locked
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Grego5
1st Mate

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USA
73 Posts
Initially Posted - 03/21/2004 :  12:00:01  Show Profile
I have a 250 WK that has the factory holding tank installed. I went to the Pump out station yesterday and let it run for about 5 Mins (until I did'nt see any dark debris being pumped) I've only had the boat since Nov and it has'nt been used much. Does anyone know how long it should take to pump it out.
Greg Perkins
C-250 WK #668
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Doug
Captain

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USA
457 Posts
Response Posted - 03/21/2004 :  18:21:24  Show Profile
Related question: I recently removed the Y valve and am now using the holding tank only. Anyone a tank gauge of some sort? how do you know when your tank is nearing the full mark?
Edited by - Doug on 03/21/2004 20:22:29
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Leon Sisson
Master Marine Consultant

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USA
1893 Posts
Response Posted - 03/22/2004 :  00:13:57  Show Profile  Visit Leon Sisson's Homepage
Doug,<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Anyone [have] a tank gauge of some sort? How do you know when your tank is nearing the full mark?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Depends a bit on the specifics of your holding tank installation. when I designed my installation, I started with a rigid tank made of thick translucent plastic. I had a clear inspection/cleanout port (4" Beckson plate) installed in an accessable location on the top, and I made sure that one side of the tank was not completely obscured by the retaining mounts. If I hold a bright flashlight tight against either the top or side, I can see the liquid level inside. The same works for my stbd water tank. There are commercially available liquid level guage systems for cruising boat rigid tanks, but I doubt you'll be pleased when you price them.

Also, my holding tank vent plumbing is 1" and exits the topsides well below deck level. In the event of an overfill, they would dump liquid and maybe even solids overboard. (Which I selfishly prefer to a burst holding tank, even though I've separated that compartment from the rest of the bilge.) If the tank ever does fill, I expect that pumping the head will likely feel and sound different enough to alert me to check the tank level. Thankfully I haven't had occasion to find out for sure!

-- Leon Sisson
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Arlyn Stewart
Master Marine Consultant

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USA
2980 Posts
Response Posted - 03/22/2004 :  07:52:18  Show Profile  Visit Arlyn Stewart's Homepage
The time of pump out will be dependent on the system doing it, and the systems vary greatly from commercial systems to home built stations. Most I've experienced take far less than 5 min, more like 30-45 sec for my 13 gal tank.

Of course the answer is as you describe, when the effluent no longer shows to be flowing in the usually supplied clear section of suction line.

A side issue is that some types of pumps used should not be run dry for very long or they will be damaged... hence the clear tube to shut down when flow stops.

As to monitoring tank level... like Leon, I have a tank which allows the level to be seen but because the tank is located in the dark area just aft of the wet locker, it required a small light mounted just above the tank to enable easy monitoring.
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Doug
Captain

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USA
457 Posts
Response Posted - 03/22/2004 :  09:27:40  Show Profile
My tank is black. Can't see through it. Are the tanks CD sells white?

I can also tell you that if the tank is full it has no problem pumping a messy combination of fluids and bio solids through the vent. Then down the side of the boat and on to the dock.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.