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Old 04-19-2012, 09:45 PM   #1
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Deck Shower - Need Advice

I want to add a deck shower so I'll be able to rinse off on the swim platform (cold water only). My idea is to install a tee in the water line that currently feeds the main water pump (for the kitchen and bathroom) and run another line with it's own pump for the deck shower (my water tank is located aft, below the cockpit).

So my question is this, will it create a problem to have two pumps hooked on the same line from the water tank? Would check valves be needed before each pump?

My other solution is to tap into the actual lines (and therefore use the main pump) and run a new line all the way aft for the deck shower (about 20 feet). But I'm thinking it's a bit far and the pressure might not be so good.

What do you think?
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Old 04-19-2012, 10:26 PM   #2
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Either will work. However T off the line and use the one pump is cheaper and easier. The psi on fluids is the same no matter the distance as water does not compress.
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Old 04-20-2012, 06:35 AM   #3
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You might consider using a Hydrant style for the outside valve , rather than a simple hose bib.

Depends on weather the system will still be pressurized in cold (overnight freezing) weather.

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Old 04-20-2012, 07:30 AM   #4
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Either will work. However T off the line and use the one pump is cheaper and easier. The psi on fluids is the same no matter the distance as water does not compress.
That's true only for static pressure (no flow). Measure at the end of a long run of hose or pipe with the rater running (at that location) and the pressure will be less because of the resistance of the hose or pipe.

For the OP: I would just use the existing pump with a "T" (and a valve). That's how mine is set up. It's shorter, perhaps 15 feet and works fine.

My advice - If you're going to all the trouble, make it a hot and cold shower. We use ours rather than the one in the head whenever possible (no one is around) because cleanup is so much easier.
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Old 04-20-2012, 11:45 AM   #5
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My advice - If you're going to all the trouble, make it a hot and cold shower. We use ours rather than the one in the head whenever possible (no one is around) because cleanup is so much easier.
Absolutely! And there's so much more room. We shower in the cockpit even up in SE Alaska. We had another shower in the head, but removed it to make the plumbing simpler, as it got no use after the first few times.
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Old 04-20-2012, 12:13 PM   #6
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We have a sink on the back deck with a long hose faucet that we use to rinse/shower. We also have on in the front shower that is long enough to rinse off the anchor chain.

So do you shower in the nude or with cloths on?
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Old 04-20-2012, 04:11 PM   #7
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There is an existing spigot on the transom of my boat and it is teed into the cold water line under the sink in the aft head. works fine.
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Old 04-20-2012, 04:19 PM   #8
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We have a sink on the back deck with a long hose faucet that we use to rinse/shower. We also have on in the front shower that is long enough to rinse off the anchor chain.

So do you shower in the nude or with cloths on?
We shower in the nude. If we're around other people (a city dock with no showers, for example), we use the shower in the head. Anchored away from folks, we use the cockpit shower.
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Old 04-20-2012, 04:22 PM   #9
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I keep my socks on
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Old 05-01-2012, 03:06 AM   #10
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I keep my socks on
On what?
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Old 05-11-2012, 01:41 AM   #11
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Americans can be justifiably proud of fellow boaters so attracted to Alaskan nude cock-pit showering, using an existing spigot, they removed the inside shower. Living in temperate climes,I`m in awe.
Reminds me of Winston Churchill, British PM, during the Battle of Britain, being informed by a nervous hesitant Secretary that a young male staffer had been arrested at 2am the previous wintery night found "cavorting" nude with a sailor in the bushes in Hyde Park. Churchill asked "Was it not extremely cold and snowing heavily all last night"? That confirmed,Churchill is said to have remarked "Makes you proud to be British".
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Old 05-11-2012, 11:15 AM   #12
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When we were moored on Lake Union the boats where so close/squeezed together, you got to know your neighbors really really well. Our galley windows was directly opposite our neighbor with about 3 ft in between. Also our marina/dock was a party dock and many parties would spill over on to our slip/dock. Many morning we would find young scantly clad young people asleep passed out on our boat. In the summer most wore very little or nothing. We would just cover them up and go about our business.


I got my grandson, 16, a job at the Blue Water Bristol, a well know meet/meat/pick up place at the end of the dock, which lasted about 2 days when I found/noticed the female where taking to much of an interest in him. Quickly got him a job at a family pizza restaurant before my daughter found out.

Those where the days. Now we are morred in dull old Everett that closes up by 7:00 ast the latest.
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Old 05-11-2012, 11:39 AM   #13
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Bruce K - Sir Winston has so many great notable quotes.

Fotoman - Assuming you T off the existing line, which I'd recommend, for the 20' run install one size larger piping than used elsewhere in the boat and the extra "length" will be no problem.
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Old 05-11-2012, 01:49 PM   #14
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I'd also recommend puting a valve close to the T so you could isolate the line and drain if needed.
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Old 05-20-2012, 08:53 PM   #15
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I put a "T" in the freshwater line and ran simple gargen hose through the bilge to the cockpit and installed a standard hose bib. Short peice of garden hose and a pistol nozzle and was in business.
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Old 05-20-2012, 11:06 PM   #16
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Charles, do you have a shut-off upstream from the garden hose? How about a check valve immediately downstream from the T? I'd be concerned about two things:

1. The garden hose bursting under constant pressure causing the loss of all freshwater. I don't trust garden hoses. Reinforced potable water hose is cheap and readily available here.

2. The taste and contamination effect on having garden hose water backing up into the freshwater system.

My freshwater washdown spigot is plumbed with reinforced freshwater hose. I rarely use it since I have raw water washdowns and I primarily boat in fresh water, but when I do use it, it never leave a charged hose connected after I'm done for any period of time to prevent its water from making its way into my freshwater system. I could install an anti-siphon attachment, but they spit water onto the decks every time you turn off the water. I just close the spigot and release any pressure in the hose.
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Old 05-21-2012, 06:51 AM   #17
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FlyWright,
As I have said often, I had the boat for 25 yrs.
LIved onboard for 5 yrs. Connected to shore water with a high quality hose from SEARS, SEARS BEST, for drinking water supply on board, never a bad taste from the hose. My experience.
About the hose breaking, not likely, never happened with the SEARS hose and it was in the sun all the time. Of course when I left the boat the spigot was turned OFF.

Think about pressure from the water pump on the boat, it is miniscule compared to shore side water pressure so that is not an issue.

In the engine room, where the fresh water pump was located, I actually had two "T" 's in the line, one for a short hose and nozzle for use in the eng room and then the one leading to the cockpit, again standard garden hose fare, with the twist valves.

Never a problem, again YMMV, it worked for me.

I forgot, for many years, I had another T in the line leading to the bow wash down hose bib, another one plumbed with garden hose. I used FRESH WATER TO WASH THE ANCHOR, why you ask, I had a 300 plus gallon capacity! When we started the 5 yr Great Circle Cruise I did install a raw water pump for this, the thru hull for it , I had installed a number of yrs before but just never got around to the pump.
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Old 05-21-2012, 11:49 AM   #18
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Thanks for clarifying that for me, Charles. I don't have a city water hookup in my boat, so that wasn't even on my radar. It makes sense that the pressure from the city water would be much greater than the system pressure.
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Old 05-21-2012, 06:49 PM   #19
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FlyWright,
As I have said often, I had the boat for 25 yrs.
LIved onboard for 5 yrs. Connected to shore water with a high quality hose from SEARS, SEARS BEST, for drinking water supply on board, never a bad taste from the hose. My experience.
About the hose breaking, not likely, never happened with the SEARS hose and it was in the sun all the time. Of course when I left the boat the spigot was turned OFF.

Think about pressure from the water pump on the boat, it is miniscule compared to shore side water pressure so that is not an issue.

In the engine room, where the fresh water pump was located, I actually had two "T" 's in the line, one for a short hose and nozzle for use in the eng room and then the one leading to the cockpit, again standard garden hose fare, with the twist valves.

Never a problem, again YMMV, it worked for me.

I forgot, for many years, I had another T in the line leading to the bow wash down hose bib, another one plumbed with garden hose. I used FRESH WATER TO WASH THE ANCHOR, why you ask, I had a 300 plus gallon capacity! When we started the 5 yr Great Circle Cruise I did install a raw water pump for this, the thru hull for it , I had installed a number of yrs before but just never got around to the pump.
Regardless of how many years you have been boating, how many years you had the boat, and regardless of your personal experience, plumbing a boat with garden hose, even Sears's best garden hose, is just wrong. Would you plumb a house or business with garden hose?

Proper marine potable water tubing is readily available, inexpensive, easy to work with, and is designed and approved for this purpose.

You don't see boat manufacturers plumbing boats with garden hose. There's a reason for that.
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Old 05-21-2012, 07:07 PM   #20
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Not EVERYTHING needs to ALWAYS be marine grade. If a Sears hose works, especially for something as simple as a deck shower, go for it. West Marine (and others I suppose) thrives on the idea that plenty of boaters fall prey to the notion that everything on a boat surely MUST be made only for a boat and it's simply not the case.

Some of us MUST find cheaper alternatives just to continue the lifestyle.

I'm just sayin'.

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