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Go Back   SailNet Community > On Board > Gear & Maintenance > Best way to connect lavac head?
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Thread: Best way to connect lavac head? Reply to Thread
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Topic Review (Newest First)
04-30-2007 12:29 AM
sailingdog Northeaster-

Just fit a through hull to the 3/4" hole and put a hose on it, and then lead the hose to a shower sump unit mounted in the bilge compartment, somewhere below the level of the shower pan.
04-29-2007 05:54 PM
Northeaster I would like to improve the shower setup, on my new "old" boat, as well, but will probably wait and make sure the big stuff works OK first. The boat has a shower, but looks like it just drains to the bilge. There is only a 3/4 hole in the head area floor - which, I assume drains to the bilge. I like the idea of having a separate shower sump, but I don't like the idea of cutting an approx 8-10" square section out of the head "sole / floor" to let the waterdrian to it. I am not sure what a normal install would be, but I think it would be cutting / recessing, or building a mock/raised floor around it, which would then be tripped over constantly! Is there another way, I am missing?
04-29-2007 01:37 PM
Valiente
Quote:
Originally Posted by sailingdog
I believe the water intake was left off the drawing to simplify it... and not confuse the novice boat plumbers...

This setup with the modifications I've indicated is designed to allow flushing into the holding tank or directly overboard, as well as pumping out the tank via the pump used to flush the Lavac head, or via a deck pumpout fitting. It is also designed to only require one pumpout fitting or connection on the holding tank.
Then it's identical to mine. My only modification, which I may or may not pursue, is to use the Henderson as a manual sump pump for an as-yet-designed shower stall. I would have an electrical bilge pump as a matter of course, but I wouldn't want my "fail-safe" to be a bucket and sponge if the sump pump packed it in.
04-27-2007 06:24 PM
sailingdog It depends on the design and size of the tank and location of the first vent. In many cases, like on the tank on my boat, one vent is fine. Also, larger tanks generally benefit more from a second vent, as they need the cross ventilation to properly air out the tank.
04-27-2007 06:23 PM
sailingdog It depends on the design, size and location of the first vent. In many cases, like on the tank on my boat, one vent is fine. Also, larger tanks generally benefit more from a second vent, as they need the cross ventilation to properly air out the tank.
04-27-2007 05:30 PM
Northeaster I know it is not the ideal material, but the current holding tank is metal (steel or aluminum, I didn't look to closely), but it seems fairly new, with strong welds, etc, on the outside anyway. I noticed that it only has one air vent, and I have read about experts advocating 2 vents. I assume that I could buy another vent fitting, drill a 2nd vent hole (filling with water ./ talking top hose off, to avoid an explosion!!)
Do you think that adding a 2nd vent would be worth the trouble?
04-27-2007 04:44 PM
Freesail99 Early last year, Good Old Boat had a story and a very good diagram on head plumbing. Maybe the Jan. 06 issue. Also the Lavac head is on sale here.
04-27-2007 04:34 PM
sailingdog Glad to help... Yes, having to make two separate pumpout connections to the tank or pumping out through the manual pump both struck me as less than ideal.
04-27-2007 04:32 PM
Northeaster Yes, I realize there needs to be a water intake - I am good with its placement.

SD - I will probably put the extra t fitting in, to allow pumpout, when needed. This setup seems much simpler to me, than both of the lavac options (from their web page), as this does not bring waste back through the pump, when using a dockside pump. Also, the flow seems esaier to follow, than in their drawings.

Thanks again!
04-27-2007 02:18 PM
sailingdog I believe the water intake was left off the drawing to simplify it... and not confuse the novice boat plumbers...

This setup with the modifications I've indicated is designed to allow flushing into the holding tank or directly overboard, as well as pumping out the tank via the pump used to flush the Lavac head, or via a deck pumpout fitting. It is also designed to only require one pumpout fitting or connection on the holding tank.
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