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I'm heading into a marina for 6 months. Pump-out is extremely expensive... like US$31!

I use the 2 heads and holding tanks *only* for urine as the marina bathrooms are close and modern, including for my guests.
Toilet paper goes into a bag.

The marina is small and inside a Lock so using the Holding Tanks is important. The water in the marina is salt.

Theres many products for marine and RV tank biodegradable effluent... but I am interested in any idea/product/chemical that might mean I can flush using less water, and, reduce pipe and tank buildup.

Fresh dock water is free, so I was wondering if theres any benefit to using fresh to flush?


Thanks :)


Mark
 

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Two problems come to mind.
If you hook up your heads to your fresh water system, back flow is possible, contaminating your fresh water system. Second, most salt water marine heads are not set up for pressure water rinsing, so this could damage the mechanism. I'd contact your head manufacturer and see what they have to say about it.
 

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I have the cheapest jabsco head available. When I'm in a marina I always use fresh water to flush with and just keep a cup in the head get water from the sink to pour flush into the bowl. I assume You can flush some acid down the line once in a while also to remove the scale.
 

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It sounds like you're wondering if you can flush less clear chase water and leave urine in the waste lines and whether fresh water would be a better idea. I understand that salt water is more likely to react with urine than fresh, so perhaps fresh would reduce scale build up. Fact check that one.

Nevertheless, I don't think it's wise to do for 6 months, even with fresh. Waste left in the lines, even urine, will eventually permeate. I understand that pushing through sufficient clear chase water really fills a holding tank fast.

Here's an idea. Buy a pilot relief jug for yourself at night, or even during the day. I use one in the shoulder seasons, before marina systems are all commissioned, or I can't get to the pump out. No way I want to walk to the shore facilities at night in the cold. My wife finds it gross, but long distance pilots have been using them forever and urine really is sanitary. They have a lid. Carry it up to the shower in the morning, in whatever bag you pack your clothing and toiletries. You could also have a larger storage bottle aboard, which you transfer to and empty less frequently.

https://www.amazon.com/1st-Defense-Industries-3591-Portable/dp/B003VSCIJ4?ref_=fsclp_pl_dp_1

Save your holding tank space for guests.
 

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Mark--

I don't know where you are situated at the moment but we are in a similar marina environment and have one head that is designed for "urine only" that flows overboard rather than into a holding tank. Urine has virtually no effect on water quality as the dilution is so great. The bowl is used, the reasonably filled with fresh water from the sink tap, then pumped overboard. Once a month or so, flush a solution of a gallon of fresh water with 8 ounces of Muriatic acid through the system and you're fine.

FWIW...
 
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....The marina is small and inside a Lock so using the Holding Tanks is important......
.....designed for "urine only" that flows overboard rather than into a holding tank. Urine has virtually no effect on water quality as the dilution is so great........
I knew this would come up. I'm the first to say that environmental discharge rules are not all scientifically sound. They paint a broad brush, rather than try to detail all the variables.

However, in Mark's case, it seems both inappropriate and a good way to get in conflict as a foreign transient guest.
 
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What is the impact of one person's urine pumped into the sea? Urine has a role in the earth's nitrogen cycle. In balanced ecosystems urine fertilizes the soil and thus helps plants to grow.
 

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I doubt there is any science that proves a small amount of urine, from a recreational live aboard does any harm. I've read perspective from many that human urine can contain chemicals, especially if one is taking meds, that are harmful to the marine environment. I suspect, in most marina, the dilution is still ample, but maybe not in all marinas.

In the end, while I'm okay with some discretion, I wouldn't want to be called out, in what Mark described as a small marina behind a lock, as a foreigner who hasn't been to the pump out in a while, without a pretty good explanation.
 
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can flush some acid down the line once in a while also to remove the scale.
I've been looking for over 5 decades for "some acid" or any other product that I could simply flush down the head to clear the ceramic build-up out of the head exhaust lines, to no avail. Got anything specific in mind?
I've used white vinegar to clean head parts and it works to some degree (it takes days), but it does not work well enough to clear the lines significantly.
 
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Pretty sure studies have been done on all the chemical witchcraft folks pour down their heads for all sorts of reasons and none have proven to actually work. Some do more harm than good.
 

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The method I've seen most often is to tee the head intake into the sink drain, close the thru hull and fill the sink with freshwater. I do think FW will reduce odor and calcification some, maybe not a lot.
Fishermen near me liked to drink beer and piss off the transom in afternoons, liveaboard on a Cat took offense, started a civil war in the marina. I grew up on small boats, took my wife years to train me to go below instead of just pissing over the side when sailing so I got no dog in this fight.
 

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The great irony of US discharge laws is that it's not illegal to pee over the side. It's only illegal to discharge it from a holding tank. It may be illegal to expose yourself, but one could easily conceal.

The easiest way to fresh water flush, especially temporarily, is to pull over the shower head (I'm pretty sure Mark has one) and fill/rinse the bowl. We do this before leaving for extended periods, just so the salt water doesn't rot and stink in the bowl.
 

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If you have a diverter valve on the head effluent... you can send urine into the sea... no need to risk public indecency ;-)
 

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Discussion Starter #16
The easiest way to fresh water flush, especially temporarily, is to pull over the shower head (I'm pretty sure Mark has one) and fill/rinse the bowll.

Yes, that's exactly what I was thinking to do.
The faucet is a shower hose too.

Reading on in tlinternet I found they used to make Gunpowder by mixing pee with straw and after a year of decomposition the rinsed out the salts and made saltpetre!
 

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I've been looking for over 5 decades for "some acid" or any other product that I could simply flush down the head to clear the ceramic build-up out of the head exhaust lines, to no avail. Got anything specific in mind?
I've used white vinegar to clean head parts and it works to some degree (it takes days), but it does not work well enough to clear the lines significantly.
Muriatic acid (cheap hydrochloric acid) from pretty much any hardware store for like $15/gallon. (logging back off email me if more questions)
 

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I used to buy little bottles of 'potassium nitrate' for my Gilbert Junior Mad Chemist Kit to make my gunpowder, bought out the local "toy" store.
 

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Muriatic is just another name for hydrochloric acid. I think I’ll pass keeping it aboard at all. It makes no intuitive sense to me that flushing it will do anything to a hose it just passes over. Maybe it helps the bottom of a holding tank, but it most certainly must destroy the tanks constructive biome.
 

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Muriatic acid (cheap hydrochloric acid) from pretty much any hardware store for like $15/gallon. (logging back off email me if more questions)
I use it to clean my running gear at haul out, but like Minnewaska, I never ever bring it aboard the boat. I seriously doubt I'd pour a couple of gallons of that stuff through my head and leave it sitting in the exhaust lines (27 feet of 2" hose) even overnight. It is, after all, one of the most dangerous chemicals I use and a little spill could have huge consequences.
But thanks for the info.
 
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