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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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26
votes
14answers
55k views

Does Pex tubing have any advantages over copper?

What are the advantages/disadvantages of Pex tubing? How does it compare to copper?
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 ...
18
votes
3answers
4k views

Why would you use copper over CPVC or PEX?

Are there any advantages to using copper rather than CPVC or PEX?
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?
14
votes
6answers
32k views

Best way to keep a PEX run in an attic (above a foyer) from freezing?

I plan on running PEX pipes both hot and cold across 16 feet of unheated attic space above a foyer. The foyer is 16' long and is off the kitchen, it isn't heated directly but is part of the house; it ...
10
votes
2answers
35k views

How should I configure my plumbing with PEX?

I have a house built in 1940, which has a mix of copper, PVC and galvanized pipe for its plumbing at present. I am going to be gutting the upstairs bathroom in the near future, and have access to ...
9
votes
4answers
982 views

Does PEX require home runs?

I've been told that PEX requires home runs to a manifold (or star topology, to borrow from networking) to maintain the same flow rate/pressure as copper. Anyone else heard this?
9
votes
8answers
26k views

Why is my brand new PEX clear tubing turning green near the water heater?

I just moved into my house with brand new PEX (uponor) plumbing. I used clear for the hot and cold instead of red and blue, because I bought everything myself and I thought it would prevent wasting ...
8
votes
2answers
24k views

Can I convert/adapt to PEX from copper tubing?

I'm remodeling a bathroom, and some of the copper tubing needs to be replaced, due to leaks and the need to reposition fixtures. Is it feasible and recommended to convert from copper tubing to PEX? ...
8
votes
2answers
1k views

How can I remove the residue that is building up in PEX tubing?

I have a pex plumbing system that has been slowly clogging / losing pressure. Our sulphur treatment system injects peroxide into the pressure tank then flows upstairs to the filter system. The ...
7
votes
1answer
10k views

Does PEX leach BPA when used for hot water plumbing?

Would using PEX for potable hot water result in having Bisphenol A (BPA) leached into the water? Does PEX have BPA content?
6
votes
2answers
2k views

“Dead-ending” unused plumbing

I'm planning on moving our hot water heater from its current location in our mudroom down to the basement, to live in what will become sort of a mechanical closet in the to-be-finished basement. My ...
6
votes
1answer
27k views

How do I tap into the PEX water supply line?

The water supply line for my ice maker was never connected. So I want to know how to tap into the PEX water supply line to allow connection to the ice maker.
6
votes
1answer
2k views

When replacing a supply line to a house in Houston, TX, what is the best material to use?

A house in Houston, TX (southern "sun belt" climate, no frost, but flexible clay soils) has a Polybutalyne supply line running from the meter to the house. It's already burst once and been repaired, ...
6
votes
1answer
159 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 ...
6
votes
1answer
3k views

I think I have a section of frozen PEX inside an exterior wall. What should I do?

The sink in our main floor bathroom, which has an exterior facing wall, seems to have a frozen hot water pipe. The cold water flows freely and toilet is fine, but hot water seems to be frozen, which I ...
5
votes
4answers
17k views

Is it possible to use a hot water recirculation pump with a PEX home run system?

I am interested in getting a hot water recirculation pump installed so that I can get hot water faster to each of my faucets. From looking at the picture and researching I believe I have PEX in a "...
5
votes
2answers
14k views

Whats the difference between black, blue and red PEX pipes sleeves

I'm using PEX pipes for water tubing, but I'm not sure which sleeve type should I use for hot and cold water pipes. Whats the difference between black, blue and red sleeves? and which should I be ...
5
votes
2answers
229 views

Is this too much strain on a PEX joint?

I have some PEX with Sharkbite connectors routed around a joist. There is some tension where the PEX joins the copper plumbing. Is it too much?
5
votes
1answer
3k views

If I use (2) 3/4“ inlet PEX manifolds (hot/cold), do I need 1” PEX supply from the meter?

I am replacing all the plumbing in my house and to the meter. I will be using PEX. I have manifolds for hot and cold with 3/4" inlets and 1/2" outlets at the valves. Do I need to use 1" PEX tubing ...
4
votes
2answers
1k views

1“ pex through 3” pvc conduit?

I intend to use schedule 40 3" pvc pipe to run my pex from outside water heater, through slab, up into an interior wall. I will have sweeping 90 ells. Will 1" or 3/4" pex be able to make the ...
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 ...
4
votes
1answer
435 views

Rough-in pex line

I have plans of building a bathroom on the second floor next year. I am currently re-modelling the first floor and I would like to get the plumbing for the new bathroom in place so that I do not have ...
4
votes
2answers
17k views

Proper way to attach tapered, threaded connections?

I've been ripping out the PB water line throughout my house and replacing with PEX and a bit of copper piping. However, the few threaded fittings each have very slow leaks. Above the water tank I ...
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 ...
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
1k views

Is it a problem that PEX emerging from the walls is floppy

I'm working on a bathroom remodel (necessitated by a failing sub-floor, but that is neither here nor there), and PEX has been recommended either to completely replace the affected plumbing or at least ...
3
votes
4answers
4k views

Is temporarily reducing the water supply line an option when installing a water softener?

I am installing a water softener in my house. Currently we're getting the water supply from 1" PEX that has a service loop in the garage. I built my own 1" PVC bypass system for a GE water softener (...
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.) ...
3
votes
2answers
1k views

Usefulness of PEX Manifold

I am redoing the plumbing for a small studio that only needs (currently) 5 hot and cold lines to go to faucets and fixtures. I am thinking of a manifold that looks like the following diagram: This ...
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 ...
3
votes
1answer
2k views

Does PEX tubing need to be secured to attic joists?

I am slowly replacing my pin-holed leaking galvanized plumbing, piece be piece with PEX and Sharkbite connectors. The old galvanized is secured, in many places by both clamps and u-nails. What is ...
3
votes
1answer
87 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 ...
3
votes
1answer
910 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 ...
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. ...
3
votes
1answer
540 views

Do I need to angle/pitch pex tubing for draining in the winter?

I've never installed any plumbing before, but I'm going to try to install an outside faucet/sillcock because it seems fairly simple. The only interesting part is that the pex tubing will be run under ...
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 ...
2
votes
3answers
8k views

Should a water distribution manifold consist of a circular loop?

I'm replacing the copper in my house with PEX tubing and I'd like to set up my new utility room with hot water and cold water manifolds. Each connection on the manifold would then lead to either hot ...
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.
2
votes
1answer
310 views

Should I upgrade to 3/4" pipe all the way to my new pex manifold?

I have a water meter with a 3/4" supply line that is fitted to an adaptor which then runs 1/2" to all the pipes in my house. I'm in the process of installing a PEX manifold system for some new ...
2
votes
2answers
972 views

A proper tool for removing a PEX pipe from a fitting barb

When a pinch crimp has to be removed and re-done, what is the proper tool to remove the PEX pipe from a barb after removing the clamp and cutting of the pipe? I thought of using the PEX pipe cutter'...
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 ...
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'...
2
votes
4answers
982 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
2k views

Plumbing Manifold Use With a Tankless Hot Water Heater

Due to the nature of a tankless hot water heater only heating water when it needs to (as opposed to having hot water on reserve), does a tankless water heater still work in a manifold system? ...
2
votes
5answers
4k views

PEX Pipes running along Ceiling on Inside Wall

My landlord fixed a leak from the baseboard heating system using a plumber who decided to run the red [guessing PEX pipes] from the water heater/boiler to the baseboards along the ceiling. The pipes ...
2
votes
2answers
9k views

Using PEX for baseboard run

I had a copper (baseboard heat) pipe freeze and burst, and need to replace a run of pipe that's exposed to that kind of cold when it gets below 0F outside. The pipe is below the floor on an exterior ...
2
votes
2answers
275 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 ...
2
votes
1answer
1k views

Would it make sense to put 2 pinch clamps on every PEX fitting as an insurance against leaks?

When installing PEX tubing would there be any benefit in putting 2 pinch clamps over each nipple instead of 1 to prevent leaks? I am not concerned about the cost, as I bought more than 2x the clamps I ...