Poly garden pipe in a boat?
Submitted by nebbian1 on Tue, 2020-12-15 12:07
Hi all,
I've recently bought a boat, and am a little concerned at the hose that connects the skin fitting to the kill tank. It looks like it's normal garden poly pipe (3/4"), which kinks easily, and can split at the kink if you're not careful. It's the one running from the camera all the way to the back of the boat in the attached picture.
As this is below the waterline, I'm concerned about it.
I bought some radiator hose (thick rubber, reinforced with string) however it seems like it's a little too thick to get through the passageway underneath the fuel tank.
What hose would you recommend for this application?
Image Upload:
dodgy
Posts: 4577
Date Joined: 01/02/10
I would use a wire
I would use a wire reinforced clear hose. I think it's commonly called suction hose.
Does anyone know where the love of god goes, when the waves turn the minutes to hours?
dodgy
Posts: 4577
Date Joined: 01/02/10
And double hose clamps on
And double hose clamps on anything under water line.
Does anyone know where the love of god goes, when the waves turn the minutes to hours?
crano
Posts: 702
Date Joined: 04/11/09
Plastic
That skin fitting looks like plastic. If it is I would swap it for a metal one.
Spicey
Posts: 219
Date Joined: 17/01/11
Barfell hose
Something like this mate
Spicey
Posts: 219
Date Joined: 17/01/11
scubafish
Posts: 962
Date Joined: 15/08/12
try
https://www.whitworths.com.au/reinforced-pvc-hose-p-metre
Does it have a one way valve on it to stop the boat from filling up with water ?
http://img.gg/BQ91Sys
nebbian1
Posts: 166
Date Joined: 31/08/17
Thanks scubafish, I was
Thanks scubafish, I was thinking something like that hose, great to hear that it's the right stuff.
No one way valve, as it is supposed to fill up the kill tank when you stop (then empty it when you travel).
Thanks for the advice, much appreciated.
scubafish
Posts: 962
Date Joined: 15/08/12
All good
I would not use one ,i kill and get on salt ice asap for the best results .Have not seen or heard of too many people think a kill tank is the best way to keep fresh fish.
Pretty sure all commercial fishos put in ice slurry.
https://www.youtube.com/watch?v=wPVnm8EDFnQ
https://www.youtube.com/watch?v=SJqWpADINrA&ab_channel=UltimateFishing
"Hey Brah"
http://img.gg/BQ91Sys
Swompa
Posts: 3878
Date Joined: 14/10/12
This stuff, metal skin
This stuff, metal skin fitting and 316 ss hose clamps.
sea-kem
Posts: 14967
Date Joined: 30/11/09
Jesus, that's pretty average
Jesus, that's pretty average and looks like it's kinked ready to split. I've literally just put a skin fitting in mine 316 stainless and reinforced clear hose, also a ball valve attached to skin fitting so I can shut it off if anything happens with the hose.
Love the West!
meglodon
Posts: 5981
Date Joined: 17/06/10
Advice
I think sea-kem has the right idea clear hose so you can always see what is coming in/out and a ball valve is an absolute necessity on anything below the water line. Can't say I would be thrilled by the idea of the tank filling while stopped then draining whilst under way. I know a friend of mine uses this setup but I don't like it.
Feral
Posts: 1508
Date Joined: 01/11/06
While I agree it looks a bit
While I agree it looks a bit shit and the clear hose would be a far better option, there is no reason you can't use that retic hose. It will handle water pressure far above what it's being used for.
nebbian1
Posts: 166
Date Joined: 31/08/17
Thanks for that guys, I
Thanks for that guys, I really appreciate the advice.
Feral, the picture might not be very clear, but the hose has a couple of permanent kinks in it, which are just asking to split and dump my family into the ocean. Not ideal.
I agree that new poly pipe can handle a lot of pressure, but I doubt it's rated for below waterline applciations, especially when it's old and kinked!
Scubafish, I just bought some of that hose, looks like it will do the job.
Now I'm trying to find a SS skin fitting and a ball valve. It's a bit hard because I live in Margaret River, long way from anywhere that has that sort of stuff.
I assume Whitworths in Perth would have it?
Sea-kem, where did you get yours from? Do you have a picture of it?
sea-kem
Posts: 14967
Date Joined: 30/11/09
Got the fittings from
Got the fittings from Whitworths and they have the correct sealant too. If I get a chance will put up a pic.
Love the West!
scubafish
Posts: 962
Date Joined: 15/08/12
Ball valve
Hardware store should have one Brass is ok and put it in line at the skin fitting end.
Skin/short piece hose/ball v/hose to tank connection.
Plastic skin is ok ,leave it.
Used to service banks and ATM'S In Maggi on way to Augusta.IGA deli make nice rolls.
http://img.gg/BQ91Sys
Swompa
Posts: 3878
Date Joined: 14/10/12
Is the boat ally? Just be
Is the boat ally? Just be aware of stainless on ally and the corrosion it will cause.
nebbian1
Posts: 166
Date Joined: 31/08/17
You guys are amazing!
You guys are amazing! Thanks so much.
I've managed to find the right stuff at Whitworths (I think) so please have a look at this and let me know if I've missed anything.
Advice on how to install this would be appreciated.
Do you need teflon tape on the stainless threads?
sea-kem
Posts: 14967
Date Joined: 30/11/09
Mate that's exactly what I
Mate that's exactly what I used but you need the sealant to go on the outside and inside part of the fitting. I still have the tube I used and you're welcome to use it but I'm away today until the 2nd.
Love the West!
Swompa
Posts: 3878
Date Joined: 14/10/12
Spot on parts wise. Trusting
Spot on parts wise. Trusting the skin fitting is below water, you need some Sikaflex too. Sika 291 from Bunnings comes in small squeeze tubes and is perfect for this application.
pelagicyachts
Posts: 1322
Date Joined: 23/02/11
wear gloves with duralac -
wear gloves with duralac - dont get that stuff on your skin
scubafish
Posts: 962
Date Joined: 15/08/12
Boat
Is it a pressed ali or plate ? I think over kill with s/s on what looks like a pressed Ali Hull. Have fitted plastic skin fittings to a 47ft fiberglass hull(all ok). Out of curiosity, do you have a deck wash and if so what fittings are on that ? Hose clamps and hose
.
i would have used Sikaflex on threads
http://img.gg/BQ91Sys
nebbian1
Posts: 166
Date Joined: 31/08/17
For those playing along at
For those playing along at home, I ended up using the radiator hose and replaced the skin fitting with a new plastic one.
There just wasn't the room to put in the stainless skin fitting, the stainless valve wouldn't fit anyway, and I was concerned at the weight of the stainless valve being supported by just the skin fitting (moment arm was huge).
The PVC hose I had was too stiff to make it between the ribs and the bottom skin (underneath the fuel tank), whereas the radiator hose was able to be pulled through with several choice words of "gentle encouragement". It's set up in such a way that even if the clamps were to fail completely, it would not want to come off by itself. I'm happy with this now. The radiator hose is double skinned, it's designed for vibration heavy environments and can bend without permanently kinking, unlike the poly pipe.
Thanks for everyone for the words of encouragement and advice, also a big thanks to pelagicyachts about the warning on duralac. That stuff is nasty, as I discovered when doing other jobs on the boat.
scubafish
Posts: 962
Date Joined: 15/08/12
all good
Well done and happy boating .
http://img.gg/BQ91Sys
pelagicyachts
Posts: 1322
Date Joined: 23/02/11
no worries looks like a fair
no worries
looks like a fair serve of sika in there to seal it! :-)
PBS
Posts: 35
Date Joined: 06/10/13
Good Job
That last photo looks like a good quality repair.
Concerning is that the original job is an indication of the attitude and ability of whoever did it.
I would check everything absolutely everything in the boat and trailer, especially anything that would come under usual owner maintenance like wheel bearings and electrics.
sea-kem
Posts: 14967
Date Joined: 30/11/09
That looks a bit sexier than
That looks a bit sexier than the original.
Love the West!
Swompa
Posts: 3878
Date Joined: 14/10/12
Good fix there, mate!
Good fix there, mate!