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05-16-2018, 06:50 AM
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#21
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Junior Member
Join Date: Jul 2014
Location: Los Gatos, CA
Posts: 4
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Quote:
Originally Posted by LabRat
I think it has to do with water pressure and possibly coupled with a loose fitting. The main clue is that the problem goes away when you use water which reduces the pressure. The regulator you are using maybe allowing the pressure in the lines to slowly creep up when there is now water usage. It is had to tell without a pressure gauge.
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I had leaking under sink with adjustable water regulator and found the leak by letting the hot water heater pressure build up and that started the leak. If air gap in hot water heater was sufficient, no leak, but if not it would leak when pressure built up from the hot water. I fixed it by better securing the fitting, just tightened them.
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10-02-2018, 07:42 AM
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#22
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Junior Member
Join Date: Jun 2018
Location: Gambier
Posts: 27
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I have two water leaks at the elbows on the hot/cold lines going to my bathroom sink they are the blue/red pex lines with the silver crimp band any ideas on how to tighten them?
__________________
2015 Ram 2500 6.4 Liter Hemi
2018 Keystone Laredo 296 BHS
Retired C-130 flight Engineer (me)
Retired C-130 Loadmaster (wife)
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10-02-2018, 08:12 AM
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#23
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,846
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Unless you have (or buy/borrow) a PEX crimping tool, chances are you can't successfully tighten those crimped bands. Probably easier and less costly would be to purchase a couple of Sharkbite elbows, cut out the leaking elbows and replace them with the Sharkbite connectors.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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10-02-2018, 08:15 AM
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#24
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Senior Member
Join Date: Nov 2017
Location: Picacho, Az
Posts: 6,809
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There are 2 types, one is a solid band, the other has a small square shaped notch sticking up, you can get the tools for Pex piping at most home improvement stores for which ever type band you have & try retightening them, worked for me.
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Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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10-02-2018, 08:35 AM
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#25
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,846
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The two types of crimps are shown here. Crimp rings are all I've ever seen as OEM on Keystone trailers. The Crimp bands are significantly more expensive (about $3 each vs 30 cents each) and Keystone (at least by reputation) is much too cheap to use the expensive type. And as TT said, there are specific tools for each which are not interchangeable.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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10-02-2018, 01:00 PM
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#26
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Senior Member
Join Date: Nov 2017
Location: Picacho, Az
Posts: 6,809
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Quote:
Originally Posted by JRTJH
The two types of crimps are shown here. Crimp rings are all I've ever seen as OEM on Keystone trailers. The Crimp bands are significantly more expensive (about $3 each vs 30 cents each) and Keystone (at least by reputation) is much too cheap to use the expensive type. And as TT said, there are specific tools for each which are not interchangeable.
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The 2nd picture is the only type used on my 5er & the tool to crimp them fits every size used on my 5er. The "bands" in the 1st picture require a different tool with various sizes inserts to fit different size bands.
__________________
Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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10-02-2018, 01:39 PM
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#27
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Gone Traveling
Join Date: Mar 2018
Location: Ajax
Posts: 431
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I don't think the pressure has anything to do with it. Fittings can leak after a while with the travelling. Where is it leaking...at the crimp or the threaded part that screws onto the faucet? Probably just a bad connection. Pex tools are expensive. You'll need a crimp ring remover also. I would just cut the pipe next to the crimp ring and unscrew the fitting. Screw on the proper sharkbite fitting with some teflon tape to the faucet and push in the pex as JRTJH suggested. You should have some slack in the pipe to do this.
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10-02-2018, 03:54 PM
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#28
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Junior Member
Join Date: Aug 2018
Location: Kellyville
Posts: 7
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Ahh.. memories of our first time out with our brand new TT
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10-02-2018, 04:33 PM
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#29
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Senior Member
Join Date: Aug 2018
Location: prophetstown
Posts: 318
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Quote:
Originally Posted by LabRat
I think it has to do with water pressure and possibly coupled with a loose fitting. The main clue is that the problem goes away when you use water which reduces the pressure. The regulator you are using maybe allowing the pressure in the lines to slowly creep up when there is now water usage. It is had to tell without a pressure gauge.
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I had a similar problem once and started with too much pressure,, after that even with a regulator I would only turn water on outside a turn or a little more,, then go in and check pressure, if it was enough would leave it alone,, if not give it another 1/4 turn and so on
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10-02-2018, 08:44 PM
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#30
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Senior Member
Join Date: Nov 2017
Location: Picacho, Az
Posts: 6,809
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[QUOTE=RagingRobert;310012]I don't think the pressure has anything to do with it. Fittings can leak after a while with the travelling. Where is it leaking...at the crimp or the threaded part that screws onto the faucet? Probably just a bad connection. Pex tools are expensive. You'll need a crimp ring remover also. I would just cut the pipe next to the crimp ring and unscrew the fitting. Screw on the proper sharkbite fitting with some teflon tape to the faucet and push in the pex as JRTJH suggested. You should have some slack in the pipe to do this.[/QUOTE
Most pex fittings have a cone washer in them that don't require Teflon tape & hand tighten only.
Also by only partially opening the faucet you are reducing the flow not the pressure which is what the cheapo so called water regulator they probably gave you with your rv does also. A good quality regulator is recommended.
__________________
Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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10-03-2018, 12:49 AM
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#31
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Gone Traveling
Join Date: Mar 2018
Location: Ajax
Posts: 431
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Danny...pretty sure the one side of the SHARK fitting that screws onto the faucet threads needs Teflon tape. I've never seen a Pex fitting with a washer in it...I'm talking elbows/couplings/tees (you said most fittings) those plastic ones that screw onto faucets yes they do. The water pressure has nothing to do with the leak IMO. A good connection will not leak regardless of the pressure unless it's extreme...then you'll want it to leak or it will probably burst.
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10-03-2018, 01:50 AM
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#32
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Senior Member
Join Date: Oct 2017
Location: Rochester, NY
Posts: 590
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Quote:
Originally Posted by RagingRobert
Danny...pretty sure the one side of the SHARK fitting that screws onto the faucet threads needs Teflon tape. I've never seen a Pex fitting with a washer in it...I'm talking elbows/couplings/tees (you said most fittings) those plastic ones that screw onto faucets yes they do. The water pressure has nothing to do with the leak IMO. A good connection will not leak regardless of the pressure unless it's extreme...then you'll want it to leak or it will probably burst.
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The fittings that screw onto the faucet itself, should have a rubber washers inside it, so they would not require to be Teflon taped.
__________________
Mike & Barb
2015 Keystone Bullet Premier 26RBPR
2018 Cedar Creek 36CK2
2017 Chevy Silverado LT Z71
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10-03-2018, 01:57 AM
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#33
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Gone Traveling
Join Date: Mar 2018
Location: Ajax
Posts: 431
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The Pex no tape....a female Sharkbite fitting you need tape
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10-03-2018, 02:46 AM
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#34
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,237
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I’ve never used Teflon tape on shark bite fittings, just the cone washers.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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10-03-2018, 08:37 AM
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#35
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Senior Member
Join Date: Nov 2017
Location: Picacho, Az
Posts: 6,809
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If you're using a pex fitting with pipe threads on one end, yes use Teflon tape, but as I said pex fittings have the cone washer, no tape needed. Even the braided hoses to connect to water supply lines under the sink have the washer, no tape.
__________________
Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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