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Questions tagged [pex]

PEX (cross-linked polyethylene) is a flexible plastic pipe that has gained popularity due it being cheaper (and often easier) than copper or PVC. Use for questions about working with the pipe, and use with the [plumbing] tag

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Baseboard heater connection to Pex Pipe Corrosion [closed]

What I'm showing is the unfinished wall behind the drywall. The pipe connects to a small bathroom baseboard heater (hot water boiler system). The pipes for the heating element look just fine on the ...
Nick B's user avatar
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6 votes
4 answers
862 views

How to insert a pex segment with sharkbite/ push-to-fit connectors in an existing [copper] line

I'm conceptually lost on how to get a sharkbite connector put on the right side of the picture below. This pex stuff is not bendable to the extent of being able to put the connector on and then get ...
WestCoastProjects's user avatar
0 votes
1 answer
24 views

PEX Piping for Tub Filler

We're installing a new tub/shower and are planning to use a Grohe valve - and thus a a Grohe Rapido Smartbox for the rough in. The ports on the Smartbox are all 1/2" and Grohe does not advise ...
dlu's user avatar
  • 508
2 votes
1 answer
109 views

Hanging multiple PEX lines along steel I-beam

I have an I-beam running along the middle of my house's basement, and I would like to attach three 1/2" PEX lines (for hot, cold, and unsoftened water) to the beam, and run them from one end to ...
adamj537's user avatar
  • 135
0 votes
0 answers
39 views

How to run 1/2” pex to manifold from old trunk and branch system?

I have old quest pipes that leak so I am repiping my home to pex, the issue I am having is how to repipe my trunk and branch system 3/4” pipe to a central location to 1/2” pipe… I will need more holes ...
Sho's user avatar
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0 votes
1 answer
72 views

What caused pex lines to become wavy?

I have a newly built home but in the past week we have noticed our water pressure seems much lower. I have looked for leaks and can’t find anything. We are on county water and they are having no ...
Colin Campbell's user avatar
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0 answers
43 views

Concern with overtightening brass shower valve fitting

I installed a shower valve with 4 brass 1/2" male fittings. Before installing I wrapped each thread with teflon 4 or 5 times. I installed it into 3x brass fittings that lead to PEX, and the 4th ...
Ocmersh's user avatar
0 votes
1 answer
37 views

Correct PEX sizing for dedicated recirculation line between fixtures

I plan on using the TACO 600e3 recirc pump. My dedicated recirculation line is slightly over 100'. The TACO Instruction Sheet (https://www.tacocomfort.com/documents/FileLibrary/006e3_iSheet_102-533....
Larry Lupe's user avatar
0 votes
1 answer
72 views

Has anybody used "Flexpex"

I am fixing a leak in my RV plumbing a ran into a new plumbing system called Flex Pex or possibly FlexPex, which is clear pex-like tubing and plastic compression fittings. I could deal with Pex, but ...
AKG's user avatar
  • 101
2 votes
1 answer
138 views

Is my Dedicated Recirculation Line designed correctly?

Question 1.) TLDR; is my design, overall, ok? (Pictured at bottom) I was originally going to do a dedicated "race-track" style hot water recirc line, then I came across a this YT video (...
Larry Lupe's user avatar
3 votes
2 answers
1k views

Restoring collapsed buried pex line?

I installed a pex water line to an outbuilding several years ago, about 150' long, buried in 18" trench. The line was disconnected for over 3 years and I recently reconnected it and no water is ...
user15741's user avatar
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0 votes
1 answer
187 views

Replace Corroded Copper Pipe With PEX?

I hired a contractor to renovate my shower. He has a five star rating with 40 reviews on Google Maps and four years on the Better Business Bureau with no complaints. Yesterday I turned off the water, ...
Ryan's user avatar
  • 557
2 votes
0 answers
58 views

Chemical smell in cold water supply after bathroom remodel

Last year, we had our bathroom redone after a toilet-related leak. The leak was in March and the work was finished in May. The house is from 1890 or so, and the contractors (chosen by our insurance) ...
Grinfish's user avatar
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1 vote
1 answer
51 views

Why is a disconnected cold line dribbling water?

A disconnected cold mainline dribbles room temp water from upstream faucets. I am going to install a water softener but did not have a dedicated line to the kitchen (for unsoftened water). However, in ...
batman's user avatar
  • 25
1 vote
1 answer
271 views

Do I need to do an air pressure test or can I just turn on the water in my new plumbing?

I am repiping the entire house with PEX-A and expansion fittings (1 bath, kitchen, washer/dryer, fridge) ... In general, to pass a city inspection: is a water line air pressure test required or is ...
farinspace's user avatar
1 vote
1 answer
50 views

Options for an immediate 90° elbow from a PEX barb options

I'm trying to install some freeze free hose bibs on my house. I purchased the shortest ones available, knowing it doesn't often freeze around me. The issue is that the hose bib intends to connect with ...
Travis's user avatar
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0 answers
99 views

Is self-seal rubber k-flex safe for hot water pex pipe

I ask because it seems the adhesive is melting and sticking to the pipe (see attached image). Is this okay? Should I instead use k-flex that isn't self-seal? Or maybe should I use a different ...
teachmehow1977's user avatar
0 votes
0 answers
48 views

Connecting Large Copper Pipe To PEX With Sharkbyte

I have some 4-6 inch copper piping that I need to replace a portion of. I have looked and can go copper to pex no problem. But is is it possible to go from 4-6 inch copper to PEX? There is a ...
Stanley Jones's user avatar
5 votes
3 answers
2k views

Main Water Line coming into House leaking/rusted out - How to replace and with what?

We just purchased a home in Joshua Tree, CA and the main water line coming into the house after the exterior shut off valve is leaking a lot. The concrete over part of it came off and I am able to see ...
JTree44's user avatar
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3 votes
2 answers
466 views

Very low hot water flow in single fixture

I have very low hot water flow (0.7 GPM) to my master shower. Other fixtures served by the same hot water line get about 2.5 GPM hot water or more. I suspect that there is a kink in the final PEX run ...
Drew Shafer's user avatar
0 votes
2 answers
154 views

Connecting new fridge to existing pex

I'm looking for a good way to connect a new fridge with water to an existing pex pipe. I previously did not have a fridge with water. Backstory, years and years ago, the contractor remodeling my ...
Dave Jorgenson's user avatar
0 votes
1 answer
108 views

Should I redo this Pex-A fitting?

I'm new to Pex A. I put this Tee together, and didn't get the line at the center of the tee seated fully before it gripped. It is not leaking, and has been holding fine for 2 days. Is it good ...
Grunthos's user avatar
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Outdoor kitchen cold water supply hookup and housing

I need to hookup a recently installed outdoor kitchen faucet and two (total) hose bibs from an existing 1/2" galvanized pipe to the exterior. In summary - 3 locations: hose bib attached to home ...
Abe's user avatar
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1 vote
1 answer
138 views

How do I stop violent pulsing in my water lines?

I am on city water. I recently replaced my galvanized pipe water line with PEX in my home (every fixture), and I now have violent pulsation in my water lines when I turn on a fixture. The PEX is well ...
Nathaniel J. Gardner's user avatar
1 vote
1 answer
247 views

Can I connect PEX to any sink shutoff valve?

Had to disconnect my dishwasher for a kitchen project, my existing supply line is in bad shape, bought one of those Dishwasher kits that uses PEX (see https://www.homedepot.com/p/SharkBite-1-2-in-...
ConfusedWithPex's user avatar
0 votes
0 answers
121 views

3/4 Black Poly Main Line Replaced With 3/4 Pex

Due to many leaks in the existing main supply line, plumbers have replaced my 3/4 black poly line from the meter in to my house with 3/4 pex. Existing line was about 25 years old. The new 3/4 pex line ...
Nick Benzick's user avatar
0 votes
1 answer
55 views

Can the pump in a hot water recirculation system handle a large descent/ascent in the race track?

Based on the Uponor logic system, our "race track", for the hot water recirculation line, would have to shoot up (vertically) 4', over 25' (horizontally), and then down 7' and back up 7' (...
Larry Lupe's user avatar
1 vote
0 answers
69 views

Are all PEX-A pipes from one brand to the next built to the same standards?

I've read that Uponor PEX-A has what's called "undulations" on the interior which causes imminent failure when exposed to chlorine and a current class action lawsuit claiming the patented ...
Larry Lupe's user avatar
1 vote
2 answers
1k views

Pex pipe to garden: Best way to connect to hose bib at house

I want to connect a 150-200' run of pex from my house hose bib out to the garden. I should probably take the hose bib off and attach another device to the copper so I can keep the hose bib and supply ...
Terrence's user avatar
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0 votes
0 answers
130 views

Pex pipe to garden. What are advantages of 3/4 in vs 1/2

I have read many posts similar to this, but have not drawn a conclusion. My hose bibs are 1/2. I am running pex out to the garden. Probably 150-200 foot run, connecting 2-3 garden hose bibs. I know ...
Terrence's user avatar
  • 111
0 votes
1 answer
368 views

Can I run pex in my attic and cap the cpvc lines in the foundation?

I live in South Florida near Jupiter. I bought a house that was built in 1997. All original plumbing is cpvc. I have heard horror stories of both slow and catastrophic leaks in the neighborhood. I ...
Daniel Morrison's user avatar
1 vote
1 answer
854 views

Normal for PEX-B fittings to rotate in tubing after crimping with copper crimp rings?

Is it normal for a PEX-B fitting to be able to rotate in the tubing after crimping with copper crimp rings? I’m using Apollo fittings, tubing, and copper crimp rings along with the IWISS iCrimp angle-...
John DiBaggio's user avatar
0 votes
1 answer
439 views

Connection between Copper and Pex pipe broke in extreme cold

During extreme cold month of Feb in East coast, my baseboard radiator pipe broke, basically the connection between the copper and pex pipe broke and water leaked all over. I called a contractor and ...
jay roy's user avatar
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0 votes
0 answers
57 views

Install outside spigot from PEX piping

I want to install an outside spigot from my PEX piping inside the house. The previous line was extracted, and I can't find where it was to follow that same route. However, my basement window is ...
Dawn's user avatar
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0 votes
1 answer
134 views

What conditions cause issues with bacteria in supply pipes other than copper such as PVC or PEX?

I know that copper is naturally antibacterial, and that seems like an advantage of running copper pipe. If PEX is becoming more common, how are problems with bacterial growth inside the pipes being ...
Ryan Mortensen's user avatar
4 votes
2 answers
3k views

How can I close a quarter turn valve?

I've been trying to figure out how to shut off this water supply line. Doesn't matter which way I turn it it does absolutely nothing. It still fills up and acts in exactly the same way. It is a ...
Sherri's user avatar
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2 votes
1 answer
249 views

Is it a problem that a PEX crimp isn't over all three barbs of a valve nipple? [closed]

My question is whether I should completely cut out and replace a PEX B copper crimp connection to a barbed 1/4 shut off valve (for toilet water supply). I didn’t have a lot of pipe length to work with ...
Chris's user avatar
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0 votes
2 answers
386 views

Is there an specific correct way to split PEX connections?

I currently have a hose bibb on one corner of my house, and want to install one on each corner. We have 3/4" pex under the house, and I am wondering if there is a correct way that the connection ...
riseagainst's user avatar
9 votes
1 answer
2k views

Do sink shut-off valves have to be centered under the sink, one on left and one on right?

I’m re-doing a small bathroom and because of size constraints need to route both shut-offs on the left side under sink one above the other. They will be hidden and accessible inside the vanity. Is ...
ACS's user avatar
  • 153
1 vote
0 answers
629 views

How do you connect things to 1/4" PEX?

I'm currently doing research on an upcoming major re-plumbing project, and have run across a bit of a mystery... Lowe's sells these riser supply lines (faucet version, toilet version) that are ...
jasonharper's user avatar
5 votes
4 answers
3k views

Should I re-do this cinched PEX connection?

It is tight against the connector on the other side, but not quite even on this one. (See pic). It is not leaking and seems to be working well. Just don’t want issues down the road and don’t know how ...
ACS's user avatar
  • 153
2 votes
2 answers
274 views

Shorten hansgrohe techniflex hose?

I'd like to shorten a Hansgrohe Techniflex hose. The spot that the pipe nipple comes out of the wall is too low and the handshower can hit the tile. Here's a pic. I already broke one hand shower this ...
jameshowison's user avatar
3 votes
1 answer
403 views

Bonding wire on copper pipe

The previous owner of my house (built in 1999) started replacing the copper water lines with PEX. There’s a bonding wire connected to a section of copper pipe that runs from my kitchen sink, but that ...
Manny Maltese's user avatar
2 votes
2 answers
92 views

Options for connectors/couplings for polyethylene pipe

A while back I asked a question about which type of pipe to use for running above ground water to a house. I've decided to use 1-1/4 inch IPS 160 psi NSF Polyethylene Pipe. Are there better options ...
trueCamelType's user avatar
0 votes
2 answers
457 views

How do you cut pex-al-pex or pe-al-pe?

The tubing pex-al-pex has an aluminum layer in it. This question is about tubing with an aluminum layer inside and not, not regular PEX-A or PEX-B. My house has (or had) kitec pipes. I'm in the ...
Evan Carroll's user avatar
0 votes
1 answer
7k views

How long should you wait after you set a cold-expansion fitting before pressurizing the system?

Some people online say you should wait after using cold-expansion fittings before adding pressure to the system. With Uponor pipe, is there any guideline on this?
Evan Carroll's user avatar
10 votes
6 answers
12k views

Why can't you use PEX between tub and shower valve and the spout?

This took me by surprise, but I was reading the Residential Installation Instructions for Uponor PEX A, and it says, Do not install Uponor AquaPEX pipe between the tub/shower valve and tub spout. ...
Evan Carroll's user avatar
1 vote
2 answers
1k views

Outdoor plumbing using pex pipe

I live in Portugal and moved into this house a few weeks ago where the plumbing was renovated by the previous owner using PEX pipe. The plumbing is all outside of the walls, including before it enters ...
Nmaster88's user avatar
  • 121
1 vote
1 answer
3k views

No hot water from wall feed into washing machine?

I have a basement laundry room with washer/dryer and utility sink. I am receiving no hot water flow out of the valve for the washing machine. I have checked the hose from the wall to washer and it is ...
Matt927's user avatar
  • 31
4 votes
2 answers
1k views

Can I migrate from Kitec to PEX in gradual stages?

My house has Kitec plumbing. I would like to replace my main runs which are 3/4 inch hot and cold water; these 3/4 runs are the ones that run in the ceiling. This leaves the runs in the wall for later,...
Evan Carroll's user avatar

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