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TOPIC: Qest to PEX Freshwater Lines Repair/Replace

Qest to PEX Freshwater Lines Repair/Replace 10 Sep 2017 02:40 #1

  • Cool Beans
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Just thought I would share Another one of my projects involving failed/failing Qest compression fittings and tying new PEX line into the existing plumbing.

I originally noticed that the freshwater pump would cycle every 30 minutes or so. I had figured the pump was leaking internally and bleeding pressure back through the diaphragm. Once I started showering on the boat, I decided it would be better to just run the hose to the city water input. I noticed a fizzing sound one night and after finding part of the bilge under the sink full of water I traced the sound to behind the access panel under the galley sink. As you can see in the pictures, the one compression nut has completely failed and looks like it has been weeping for a long time. The other compression nut is on it's way out. A survey of the rest of the fittings in the boat revealed a couple cracked nuts, but no leaks. With the good nuts I've saved, I'm going to repair the other couplers on the boat. Long term goal is to replace everything with new PEX. Only thing left for me to do to finish this part of it up is zip tying the new lines to the cable run. Pics below. Instead of using the PB to PEX coupler sold by Sharkbite, I found the female swivel adapter fits the threaded end of the "T" just fine so the new lines are complete with no splices.




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. . .It places the lotion in the Basket. . .and that basket happens to be in a 1987 Bayliner 3870 w/ Hino 175's
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Qest to PEX Freshwater Lines Repair/Replace 10 Sep 2017 02:42 #2

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. . .It places the lotion in the Basket. . .and that basket happens to be in a 1987 Bayliner 3870 w/ Hino 175's

Qest to PEX Freshwater Lines Repair/Replace 10 Sep 2017 15:12 #3

  • Pcpete
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Excellent work Beans! I'm planning on removing the hand pump toilets and installing fresh water electrics and hadn't gotten to the water supply issue yet. Problem solved!

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P/C Pete
Edmonds Yacht Club (Commodore 1993)
1988 3818 "GLAUBEN"
1980 Encounter Sunbridge "Misty Blue" (Sold)
MMSI 367770440
1972 Chevrolet Nova Frame off Resto-mod in the garage
Boating on the Salish Sea since 1948

Qest to PEX Freshwater Lines Repair/Replace 12 Sep 2017 05:18 #4

  • Jim Gandee
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Great job CB! Thanks for taking the time to share!

Did you increase the ID size of the new lines by any chance?
.

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Jim Gandee
1989 3888
Hino 175's
Fire Escape
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Qest to PEX Freshwater Lines Repair/Replace 12 Sep 2017 17:36 #5

  • Cool Beans
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Thanks! I'm trying to contribute in anyway possible :)

Jim, I installed 1/2" PEX line, if that's what you mean? The stock PB is 3/8" dia. inside. I guess I did, but not on purpose, hehe. I don't think you can buy less than 1/2" water supply line, at least that's what they had at Home Depot...

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. . .It places the lotion in the Basket. . .and that basket happens to be in a 1987 Bayliner 3870 w/ Hino 175's
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Qest to PEX Freshwater Lines Repair/Replace 12 Sep 2017 18:09 #6

  • yachtman
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That old gray stuff is the worst!!

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1989 Avanti 3450 Sunbridge twin 454's

1979 Bayliner Conquest 3150 hull#23

1979 Bayliner Conquest 3150 hardtop hull#24
Twin chevy 350's

Qest to PEX Freshwater Lines Repair/Replace 12 Sep 2017 20:16 #7

  • Jim Gandee
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Cool, I was thinking that a larger diameter line would get more water to the shower, which in my boat is adequate but not what I'd like.

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Jim Gandee
1989 3888
Hino 175's
Fire Escape
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Qest to PEX Freshwater Lines Repair/Replace 13 Sep 2017 02:22 #8

  • Cool Beans
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Hey, where did my pictures go?

Jim, the new lines are 1/2" which is greater then the original lines...but all the fittings are 3/8" so you have the same restrictions and I don't know if you would notice any improvement in flow. With dock water or the 3gpm freshwater pump I find I have a nice shower stream with the right shower head. It is a cheap box store shower head with an option for "high pressure" which I have it set too.

I think if you bump the volume of your down stream lines you need to up the volume your pump can supply. You might need a bigger pump? An extreme example: on a 44 foot trawler I looked at, I believe it had a 1/2hp well pump with a 15 gallon expansion tank on top. It had no problem supplying a nice stream of water :pinch:
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. . .It places the lotion in the Basket. . .and that basket happens to be in a 1987 Bayliner 3870 w/ Hino 175's

Qest to PEX Freshwater Lines Repair/Replace 13 Sep 2017 03:09 #9

  • Jim Gandee
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I'm not anchored out much so conservation isn't top priority. I'd go to a bigger pump if I had to, as well as larger lines to get a good shower! But this project's not at the top of the list right now. Next project is to recarpet the interior.

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Jim Gandee
1989 3888
Hino 175's
Fire Escape
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Qest to PEX Freshwater Lines Repair/Replace 13 Sep 2017 12:39 #10

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I hadn't thought of using PEX piping. I was planning and dreading using CPVC to re-plumb the entire boat. I was have a difficult time trying to figure out adequate ventilation for the solvent and glue (which make me woozy and sick to my stomach). Thanks for the show and tell, and by the way, good job.

Greg

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Newport, Oregon
South Beach Marina
1986 3270 with twin 110 HP Hino diesels. Name of boat "Mr. Darcy"
Past work history: Prototyping, tooling, and repair for Reinell,. General fiberglass boat repair starting in 1976.
Also worked as heavy equipment mechanic, and machinery mechanic for over 30 years....

Qest to PEX Freshwater Lines Repair/Replace 13 Sep 2017 19:56 #11

  • Cool Beans
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Jim, check your shower heads rated GPM output and compare it to your pump. Up to 1992 they were rated for 3.5 GPM, after 1992 2.5 GPM...and I think now you can get 2.0 GPM shower heads.

Can anyone see the 4 pictures in my first post? They were there for a day, now they are gone for me...I will repost them if I need to!

And thanks Greg!

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. . .It places the lotion in the Basket. . .and that basket happens to be in a 1987 Bayliner 3870 w/ Hino 175's

Qest to PEX Freshwater Lines Repair/Replace 13 Sep 2017 21:13 #12

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They're still viewable on my feed. Nice work, too!
Jim- I'm with you. New carpet is next on my list as well. We thought about hardwood but as we live aboard we'd prefer carpet underfoot in the winter.

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Drew Haas
1988 3818 "Painkiller"

Qest to PEX Freshwater Lines Repair/Replace 13 Sep 2017 22:32 #13

  • Jeffw
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Jim Gandee wrote: I'm not anchored out much so conservation isn't top priority. I'd go to a bigger pump if I had to, as well as larger lines to get a good shower! But this project's not at the top of the list right now. Next project is to recarpet the interior.


Jim, I'm sure you've checked for and removed any flow restrictor, right?

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Jeff & Tara
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Lake Havasu City, AZ
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2000 Bayliner 2858
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MMSI: 338094599
In memory of Shadow, the best boat dog ever. Rest in peace, girl. July 2, 2010

Qest to PEX Freshwater Lines Repair/Replace 19 Sep 2017 05:10 #14

  • Jim Gandee
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I've checked the size of the shower nozzle, blockage and contamination and restrictions. I was kinda wondering if larger diameter lines would help cure the hot/cold sensitivity issue with the shower faucet.

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Jim Gandee
1989 3888
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Fire Escape
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Qest to PEX Freshwater Lines Repair/Replace 19 Sep 2017 10:22 #15

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Probably not. Every RV and boat we've had (when on the 12v. pump) has the same issue to some degree.

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Jeff & Tara
(And Ginger too)
Lake Havasu City, AZ
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2000 Bayliner 2858
"GETA WAY"
MMSI: 338094599
In memory of Shadow, the best boat dog ever. Rest in peace, girl. July 2, 2010

Qest to PEX Freshwater Lines Repair/Replace 29 Sep 2017 02:29 #16

  • Alan Teed
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Thanks for the posting on this project. I have done similar. I recently replumbed my cabin and in order to do that I purchased the necessary PEX fittings and a compression tool for PEX. What a great investment! Everytime I address something on the boat I upgrade to PEX in that area. So far I have done both fresh water heads supply plumbing; fresh water pump (two pumps operating in parallel with valves to take one out of circuit if/as needed). My next project will likely be the Galley. With the right tools PEX is cheap and pretty much bulletproof. Equally the cabin plumbing rocks with a manifold and individual runs to each water supply line. Life is good!!

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Alan Teed
MOONDANCE
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Gig Harbor, WA
Previously:
2006 Hylas 49' blowboat
Bayliner 2855
1977 Cal 34' blowboat
1981 Hunter 33' blowboat
Experience: Sail 50 years, Motor 15 years. 2 Transats, 1 Baltimore-Virgin Islands, 6 Months cruising Caribbean, 3.5 years cruising Med.

Qest to PEX Freshwater Lines Repair/Replace 29 Sep 2017 21:53 #17

  • PortHoleDiver
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Beans great thread. The pic's are quality. I had mine split at the same location. I was out in the cockpit and the high ater bildge kept coming on. I knew this wasn't right. As soon as I went inside I heard that sound. Spraying all under the cabinet. Love the PEX idea.

Tom keep us up to date on the carpeting cost.B)

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Charles
'89 3870 M/Y
Located on Galveston Bay
Prior boat '85 300SB Sea Ray
Lost in Hurricane IKE
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