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Old 02-02-2009, 23:06   #1
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Replacing blackwater lines - need a 180 fitting?

OK, I'm going to tackle this job we've put off...

Here's a problem. The line that goes from the overboard pump to the seacock has a kink in it (which we rarely use because we're not often that far offshore AND remember to pump it or need to pump it). But still, if I'm doing the job, I'm going to do it right AND we do have some extended cruising plans. The bozo that originally plumbed this, ran a piece of clear, reinforced hose from the hand pump to the seacock that is right next to it, by just doubling the hose over, and kinking it.

So, what I really need to do is to run the hose about a foot to a 180 degree fitting, and then a foot back to the seacock. I could make a long run with a full loop in it, but I hate to have that much more hose (at $8 a foot) AND it still makes it likely to kink over time.

Any thoughts as to what/where I should purchase?

TIA,
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Old 02-02-2009, 23:12   #2
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How about two 90 degree street elbows with a hose barb at each end?

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Old 03-02-2009, 03:59   #3
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A plumbing fitting with a 180-degree bend is called a “return”. Ask at a plumbing wholesaler.
They're common in Copper, but I don't recall seeing them in PVC.
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Old 03-02-2009, 04:48   #4
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Blackwater plumbing

If you are going to do it right, you must be intending to use proper sanitation hose ( the white stuff is best).It is not so subject to kinking. I think that if you run this as far as it needs to go to make a 180 degree turn you will be in business. It will take some more hose, but then again, you want to do it right, no? The only other way would be to use a vented loop fitting, might be a little less hose used that way.of course this will work only if you can route the hose UP to above the heeled waterline.
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Old 03-02-2009, 09:10   #5
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Any way you can move the hand pump over a bit so you can run a short straight length of hose to the seacock?
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Old 03-02-2009, 15:08   #6
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Both are permanently attached...
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Old 03-02-2009, 15:10   #7
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I'd always heard that the Trident Black is the best... Is there a better choice?
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Old 03-02-2009, 16:31   #8
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Here, you figure it out...

Trident Marine: Sanitation Hose
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Old 03-02-2009, 16:46   #9
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Quote:
Originally Posted by DeepFrz View Post
Here, you figure it out...

Trident Marine: Sanitation Hose
Thanks... They look identical to me...
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Old 03-02-2009, 18:03   #10
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I just did that job myself. I was told that the white hose was the best. It has a longer gurantee. The job was not as offensive as I thought it would be. Make sure you have plenty of rags and plastic shopping bags. whenever you take a hose off stuff a plastic garbage bag in the end and then put a rag on top of that. Doing this helps to prevent leakage. I was not able to get a 180 degree bend out of the white pipe even when heating it with a heat gun and slowly bending it around. The two ideas that I had were to:1) build a 180 degree turn with a combination of street and regular 45 degree PVC. 2) to take an antisiphon and connect it with short pieces of straight hose and then plug the antisiphon vent. What I finally ended up doing was beating the calcium build up out of the piece of pipe that was there, testing it with a warm rag to see if it was the cause of any odor, and using that pipe. For some reason the black hose was better able to make the 180 degree turn than the white pipe. Probably the metal inside the hose. I have heard but don't know if it is true that the black hose is just the same as exhaust hose only it has a different label. If you do a search on CF you can probably locate that thread.
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Old 03-02-2009, 18:07   #11
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Funny story this ... the "best" sanitation hose is allegedly not the white stuff that we're all accustomed to, but rather a black sanitation hose that looks suspiciously like wet exhaust hose. I had a customer order several hundred feet of this from me. I ordered it from our supplier "Unaflex". When it didn't show up on time, I called them to see what the problem was. Thier response was that they had to change the label printed on the hose from "101 wet exhaust hose" to "100 sanitation hose" ... and simply hadn't gotten around to it. Anybody want to guess how much more the "sanitation hose" cost than the "wet exhaust" hose ?
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Best wastewater hose to use
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