Trojan Boat Forum

I have decided to replace all the pipe/tubing/hoses in fresh water system . I am thinking about using PEX tubing as its easy to work with and bends nicely and its cheap too . Any thoughts on using PEX or any other ideas ? Thanks .

I prefer push-to-connect fittings over the PEX-brand crimp fittings. They are more costly, but they include an o-ring seal, require no specialized tooling, come in a gazillion configurations, are (usually) all plastic, and are a joy to work on. OK, that might be a stretch. Regardless, the crimp fittings are not as easily reversible as the venerable NPT or push-to-connect. That said, I've no complaints about the quality of PEX-brand piping. And you will probably want to spring for the de-crimping tool when you pony-up for everything else. It will come down to what you are comfortable working with and how many fittings you have to buy.

I used the red and blue pex and re did my entire system . decided to uses the the push on sharkbite fittings for a few reasons. easy to install in very tight areas where it would be impossible to use a crimping tool. they swivel after being installed which make them easy to adjust. if you screw up you can remove and reuse the fitting. They never leak .

I thought about red and blue but its not available in 1/4" along with many fittings If I when with a larger size I would still have to down size at the facets so I trying to stay with a 1/4"

prowlersfish wrote:I thought about red and blue but its not available in 1/4" along with many fittings If I when with a larger size I would still have to down size at the facets so I trying to stay with a 1/4"

Our boat has 1/2 older style pex type which works real good, only thing is getting the fittings right at the taps etc, past that it is fairly easy to work with.....you could consider the larger size tubing as a type of volume reservoir and only worry at the ends, that would be a bit of a benefit I think...Mike

I replumbed my 46' trawler with Sea Tech brand which is the red and blue tubing. Great stuff to work with. I used the larger size in order to get the maximum flow possible. One problem with it is when you buy the coiled tubing, it is very difficult to get it to straighten out. I ordered 10' straight tubes instead. You can get plastic fitting that are used in home plumbing to make 90 degree turns without any fitting which also helps maintain good flow. I would not use 1/4" tubing any more than absolutely necessary due to low flow. The Sea Tech fittings are very easy to use. Just make sure that you fully insert the tube into the fitting. Also, you are able to remove the fitting and reuse it. As previously mentioned, you can swivel the fitting under pressure without causing a leak. It also comes in white tubing which I used for sea water wash down plumbing.

Mine has 1/4" id now I believe that what it came with new But at its age who knows for sure . I want to stay with 1/4 . As a increases in flow could mean more water used .

Hey Paul, double check your tubing size I find it hard to believe you have 1/4" tubing. Our boats are only a few years apart and mine is 1/2" tubing. It may be 3/8" but doubt its 1/4. With 1/4" tubing you would have very little water flow. Is that why you don't shower on the boat?

The section I just replaced was and is 1/4" as is the section going to the galley sink . The section I just replaced goes to the sink in the head . This tees off the line going forward to the shower . Its possible that could be larger I will check the size of this before ordering . Funny thing about PEX the 1/4 is a full 1/4" ID and the 3/8 and 1/2 are not . They are slightly smaller 3/8 is 0.35" and 1/2 is 0.475" .

Thinking about it , it makes sence that the lines that feed to the shower and have tees to the head sink and the head it self would be large then the lines coming off it . I will find out soon .

I would go with Pex. I am a plumber by trade. FWIW. You should have 3/8" to lav. kitchen and head and 1/2" to shower. Get the brass fittings because they hold up better. Also go with the copper crimp rings not the tin. Shark bites are ok in a pinch but it is a mechanical device. All mechanical devices have problems. And they can leak. PEX is very resilient and will work great in the marine atmosphere. It holds up to freezing very well too.

Defiantly 1/4"ID to the sinks . Flow is fine . I will check the others this weekend

FYI. In general tube is measured on the outside and pipe is measured on the inside. Then there is pex its a little off. I just have not ever used or seen 1/4" PEX. The other sizes (3/8" 1/2" 3/4" 1") are going to be easier to get all the fittings and adapters.

Reel Easy wrote:FYI. In general tube is measured on the outside and pipe is measured on the inside. Then there is pex its a little off. I just have not ever used or seen 1/4" PEX. The other sizes (3/8" 1/2" 3/4" 1") are going to be easier to get all the fittings and adapters.

The 1/4'" is not as common for sure and its hard to find the fittings other then the "qest" type . But its what boat has now size wise and if I went to say 3/8 I still have to change down to 1/4 ID ( pex pipe is ID sized marked ) at the sink . I know what you mean about PEX being a little off . I bet its metric sized and rounded to us sizing . I am trying to keep this simple but its not easy LOL . And keep the fittings to a minim .

This like what I used to repair 1 line
http://www.lowes.com/pd_308057-61002-AP ... 0xvt+2z8vi__