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

Filter by
Sorted by
Tagged with
1
vote
1answer
40 views

Installing PEX pipes close to heating vents

We are renovating all the bathrooms in our house that was built in the early 70s. The plumber has replaced most of the copper pipes with PEX tubing. He has not replaced copper entirely and has ...
2
votes
1answer
627 views

Chemical Smell After Tankless Water Heater Install

I recently had a plumbing company install a tankless water heater in my crawlspace. Everything with the install works and looks great, but we are experiencing a very strong chemical smell (like nail-...
1
vote
1answer
209 views

PEX Home Run System

I am looking for insight. I am the 3rd owner of a single-story home built in the late 80s. It has 3/4" polybutylene (PB) plumbing running through the attic with 1/2" PB branching off. We have 2 full ...
0
votes
2answers
108 views

Copper to PEX connection

I am swapping out an old pedestal sink for a conventional vanity. Currently in place are some 1/4 pex lines that are run through the pedestal. I want to swap the small pex for 1/2” and am fairly ...
1
vote
1answer
31 views

PEX repipe and hot water issues

We just repiped out 45 yrs old house with PEX and the whole process was very smooth and I’m glad we did this. I knew the water pressure would change going from 90 psi water pressure to I don’t know ...
3
votes
1answer
1k views

Should I replace my trunk-and-branch setup with a PEX manifold?

My house is plumbed using PEX trunk-and-branch, with the main 3/4 line coming in, splitting off to 3/4" to the hot water tank, and then a 1/2" trunk that all the other branch supplies tee off from. ...
0
votes
0answers
31 views

Any differences between Apollo PEX-B and Sharkbite PEX-B - Need to Run through Wooden Studs

I noticed that near me, HD carries Apollo PEX-B and Lowe's sells Sharkbite PEX-B. Are there any differences between these two in terms of flexibility, durability, etc? I wasn't sure if one brand was ...
0
votes
2answers
88 views

Would Replacing an Existing 3/4“ Water Main Line with 1” Improve Overall Volume/Flow to House (GPM)

After my own inspection and talking to the utility company I have the following: The meter (near the road) is 5/8" x 3/4". From what the water company told me - this is the most commonly installed ...
1
vote
1answer
94 views

What size manifold for 1" pipe from meter?

I am running all new water supply in an old house (c 1884). The incoming line from the meter is 1" galvanized (no idea how much mineral buildup is inside). Will it be sufficient to replace all of ...
1
vote
2answers
372 views

Does 3/4” pex supply enough water for a house

Will 3/4” pex with an inside diameter of .68 inches have enough capacity to supply a 3/4” manifold with 1/2” supply lines to a bathtub, washer and toilet and sink with no pressure drop? I plan on ...
0
votes
0answers
28 views

where to run pex in cabin

pressure tank in unheated cabin Best way to keep a PEX run in an attic (above a foyer) from freezing? I have the full well and pressure tank system finally working :) Need a run from the wiring ...
1
vote
0answers
105 views

Installing Spigot Upside Down and Close to Ground

I live in a trailer and am debating attempting to put a hose outside/on the side. A few considerations: I have no plumbing experience It gets -40 where I live in the Winter I have read great things ...
2
votes
1answer
750 views

Water Softener Drain Line with Loop - Flexible PVC to Sharkbite?

So, I bought a Genesis Revolution upflow water softener to install in my first house in Laveen AZ. We have a water softener loop already plumbed into the house. The airgap is in the laundry room ...
3
votes
2answers
95 views

Pex bend supports keep breaking

I've used PEX bend supports in the ½" size before which worked great, but trying to use them for ¾" has been difficult. Regardless of the method I've tried, the plastic ones keep snapping. Using the ...
1
vote
2answers
124 views

How crooked can you crimp pex rings?

I had to add a supply valve for my refrigerator in my house. It's my first time working with pex. I added some Pex B to my existing Viega cold water line and used copper crimp rings with the ...
0
votes
1answer
48 views

Should I replace 3/4“ and 1/2” galvanized pipe with the same sizes of pex?

So I am about to replumb my house. From the meter to my house is 3/4" 60 yr old galvanized pipe. Once it gets to the house it changed to 1/2" lines serving everything in the house. Example is a 1/2" ...
2
votes
0answers
50 views

Is PEX very susceptible to damage from rats/rodents?

A friend of mine wants to re-plumb his house. The neighborhood has recurring issues with rats. I heard rats like to (as in "seek out opportunities to") chew through and damage PEX plumbing, whether ...
2
votes
4answers
39k views

Can I run water lines through the attic?

I recently had a Slab leak in my home in Indianapolis,IN. This is the 4th Slab leak since I've owned the home. I decided it was time to reroute all the Water lines. I thought this was best so I wouldn'...
0
votes
0answers
16 views

1/2 pinch clamp for 3/4 PEX?

I used a 1/2 pinch clamp on a 3/4 PEX and it worked. I was in a pinch, no pun intended! Should I change it out? It's been a few weeks now, no leaks. Tom
0
votes
1answer
21k views

Plumbing rough-in pressure test PSI

My plumbing rough-in is done, and inspection was passed. Unfortunately, I had to move a couple of things the plumbers did. I probably had to redo about six crimps rings. Before I go any further, I'...
3
votes
1answer
86 views

What should happen with plumbing ground connections when converting to Pex?

My house is being re-piped by replacing all of the copper with PEX starting at the water service entrance. I'm on a well which is 150' from the house and the service line is CPVC. Currently, there is ...
3
votes
1answer
207 views

Can anyone identify/name this plumbing component?

Located under all the "AM/PM Kitchen" (bedroom) sinks in the house: It adapts the 3/8 PEX output from the mixer valve to 1/4 PEX to the spigot. The thing that looks like a valve does not appear to do ...
1
vote
0answers
42 views

Tapping into existing 3/4“ supply and 3” drain to add washer

I understand there are a lot of variables to something like this, so I'm going to try to provide enough detail that people can at least understand the question here: I have a washer/dryer I'd like to ...
21
votes
20answers
178k views

What is the advantage of PEX pinch clamp vs. crimp rings?

I just saw these for the first time today at Lowe's: The advantages I can see over the crimp style are: A single tool can work with multiple PEX sizes That single tool is cheaper than a single-size ...
1
vote
2answers
117 views

3/4“ PEX fittings less than 3/4”?

I have some plumbing that has been done in 3/4" PEX and the 90-degree brass elbow fittings that connect the lengths of tubing fit inside the tubing, so I don't see how these elbow fittings could ...
3
votes
3answers
2k views

Is copper piping required within a certain distance from a water heater?

I have read that National Code requires you to use copper for 18 inches from your water heater. How can I do this when everything existing is PEX? I need to replace my existing low boy water heater ...
3
votes
2answers
98 views

PEX: Is it worth replacing crimps with push connections?

I happened upon a question about PEX tubing last week here and in it there was some discussion about how push connections are superior. (If someone can point me to that question, I'd appreciate it.) ...
0
votes
0answers
21 views

Sink Faucet takes a long time to get warm

New Construction Tankless water heater (1 gpm activation) PEX Tubing (the red and blue) Kitchen faucet is Moen 5923 - supposed to be 1.5gpm If I turn on another sink in addition to the kitchen sink, ...
1
vote
2answers
482 views

Sleeve for below grade pipe penetration

I need to run a hot and cold water supply line to an outside structure 13' away through my basement block wall. This is in the Northeast US, where the frost line is 42" and the penetration will ...
3
votes
5answers
43k views

How to remove a stuck Sharkbite connector from a PEX tube?

I have a Sharkbite stopper that I put on the end of a 1/2" PEX tube, and now I'd like to remove it. I've used both the official orange plastic removal tool and an adjustable wrench, and my fingers are ...
2
votes
4answers
952 views

Would increasing pipe size just after the meter give better flow without increasing pressure too much?

I have a wife and 5 kids. Three of them are teenage girls, which means I hardly ever get a chance to shower. I wanted to put in a second bathroom to help fix this. I spoke with some local plumbers and ...
2
votes
1answer
133 views

What is the recommended method of insulating PEX piping?

During the winter chill here in DC, one of my pex pipes that is not insulated and basically exposed to the elements cracked. I blame the contractors who didn't insulate and finish the job, literally ...
6
votes
1answer
158 views

Connecting new Pex water line to 20 yr old Pex

I'm preparing to connect new 1” Pex water line from well to 20 yr old house, that is also Pex piping. I plan to either use copper crimp rings or shark bite clamp fittings. My question is, could there ...
0
votes
2answers
285 views

Can you re-crimp the end of a PEX tube?

If you take apart an existing PEX connection, is it going to perform correctly if you re-crimp the same end of the tube - without cutting it - to a new fitting? Often with PEX you can flex it a bit ...
2
votes
2answers
271 views

Do pex fittings need to be replaced when installing a new water heater?

I have purchased a new water heater to replace the original 11 year unit. I am concerned in attaching the existing fittings to the new unit. I believe the builder used pex directly to the original ...
0
votes
0answers
25 views

Estimating plex tubing purchase

I am in the planning stages of building a new 4300 sqft home for my family. I am working to build out how much it will cost to run all the supply lines for my plumbing (contracting out the drains). ...
0
votes
0answers
135 views

How to calculate pressure loss on PEX 90-degree elbows?

I'm probably overthinking this, but I need to, as close as possible, determine how much pressure I'll lose with PEX 90 degree elbows. Had a new well pump installed (1 hp, 10 GPM), well guy is wrapping ...
2
votes
3answers
24k views

Should I replace all the copper pipe in my heating system with PEX?

I am replacing my existing faucet plumbing with red / blue PEX all over the house. Everything that goes to the sink, dishwasher, washer, bathroom sink and so on will be color coded and installed ...
0
votes
1answer
249 views

What's up with the PEX on this shower valve?

I've been using PEX for a couple years now. I came across a few shower valves recently, but the 1/2 PEX lines for the hot/cold are not what I'm used to seeing. Please compare my photo (top) with a ...
4
votes
1answer
3k views

Can polyalloy (plastic) pex fittings be used with both styles of attachment rings?

Some pex fittings are made of a type of durable plastic known as polyalloy. Examples: These fittings appear to be plastic equivalents of their brass counterparts. In general is it permissible to ...
1
vote
0answers
29 views

Concealing PEX indoors with a metal hat channel

I'm replacing the galvanized incoming cold line with PEX. The incoming line runs into the exterior wall of the home about a foot from the ground, then goes down the wall, through the sill plate into ...
0
votes
1answer
597 views

Do I expand or crimp pex water line, and why?

New construction water lines, should I use expansion on the fittings or should I crimp them?? And why- pros and cons of each. I have another question posted about proper sewer venting diagrams and ...
0
votes
0answers
68 views

Can negative pressure in a PEX plumbing system cause or contribute to leaks?

Generally, when draining one's plumbing system all the faucets (or at least the ones at the ends of the manifolds or loop) should be opened so that all the water drains from the system and as the ...
2
votes
3answers
10k views

Pex Plumbing System w/ Manifold (Entire House)

I am redoing a bathroom and while I have access, I would like to do my entire house in Pex. It looks like I will be able to get to all supplies and had a few questions. My main supply is 3/4 and will ...
0
votes
4answers
1k views

Using PEX as wire conduit

I have some 1/2" PEX-AL-PEX left over and thinking about using it as conduit for ~20' ethernet or phone cable. Pipe is appropriately orange. Will the aluminium layer provide RF shielding? (assuming I ...
0
votes
1answer
170 views

Do I need a regular Tee or a Slip Tee to add new line (pex) to existing line (copper)?

I'd like to cut into an existing hot water (copper) line to add a Tee and run a new hot water line to somewhere else in the house. Do I need a regular Tee or a Slip Tee? I'll be using Sharkbite ...
1
vote
6answers
8k views

How to Get PEX to Seal

I'm in the process of moving my laundry area. For the plumbing we decided to use PEX. Unfortunately I have been unable to properly seal the PEX tubing to the fittings on the final fixtures- they ...
3
votes
1answer
908 views

what PEX fittings can I use with a Zurn PEX QickClamp Crimp Rings?

I have Zurn crimp rings and the Zurn ratchet tool. I was wondering what brass fitting I can use. Do they need to be Zurn fittings or can they be any crimp fittings? For example, can I use ...
16
votes
16answers
76k views

Is it worth it to insulate hot water PEX tubing?

Is it worth the time and expense to put the foam pipe wrap on pex hot water pipes? I've seen mixed statements. What is your thought? But more importantly, can you back it up?
2
votes
2answers
143 views

What brand are these pex threaded T connectors?

Has anyone ever seen these type of PEX connections? I can't find them anywhere online or otherwise.