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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37 views

Hot and cold 1/2 pex, straight run for outdoor shower, pvc 1.25 is that too narrow for both runs.?

Outdoor hot and cold faucets, idea was to attach 1/2 pex to faucets and run through 1 1/2 pvc piping about 12" under ground for an Outdoor sbower, before pavers are installed. Both pex lines ...
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74 views

Can PEX be routed through existing Copper Pipe?

We have a kitchen island with a faucet/sink and the existing copper pipe under the tile floor has sprung a leak. The plumber is suggesting to run a PEX pipe through the existing copper pipe to restore ...
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4answers
5k 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 ...
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31 views

Replace Copper Pipe & Gate Valves With PEX Pipe & SharkBite Ball Valves & Fittings

Summarize the problem My 35 year-old home's water supply gate valves and outdoor hose bibbs are very difficult to turn on and off. Provide details and any research The primary water supply comes in ...
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4answers
106 views

Hose splitter leading to low pressure

I recently added a garden hose splitter to my bib in my garage and outside, to be able to use 2 hoses at the same time from the same bib. I would sometimes need to run both my garage bib and outside ...
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2answers
83 views

Can I safely attach new fittings to an older PEX A line?

I have a 10yr old "PEX A" line (red, 1/2", "potable," "100PSI") running to my rear hose bib. I'd like to install a tee in this existing line and run a branch to the ...
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2answers
141 views

Protecting PEX/UF-B/Ethernet from gophers with hardware cloth?

I have a well house and some outbuildings that will need some water. I am running 1" PEX underground in 30" deep trenches to these buildings, as well as 10/3 UF-B and some ethernet cable for ...
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1answer
3k 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 ...
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1answer
467 views

PEX Line Toilet Water Supply Disconnect

I just bought a house built in 1984 it has PEX plumbing. I need to remove a toilet to install a new floor and I noticed the water supply line to the toilet connects to a water shut off valve that I’ve ...
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2answers
187 views

Can pex be used underground?

I have 2" PVC coming from my well, connecting to a PVC shutoff valve and then to an existing spigot. I want to removed existing spigot and extend water line 140ft to my RV location and install a ...
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2answers
235 views

For a bathroom pex plumbing should I go with trunk-branch or with a home run manifold plumbing layout?

Below is the layout of my bathroom and my starting point are the red/blue vertical copper pipes you see in the picture. The walls you see will be tiled so not sure how much sense would make to have a ...
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1k views

Is putting a pex tube underground and then through a concrete slab OK?

I have a house with a basement and I'm building a garage about 50 feet away in the backyard. The garage will be on a concrete foundation and I want to run both power and water out there. (I want the ...
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2answers
1k 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 ...
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1answer
2k views

Can the drain pipes in my kitchen soffit be relocated into the wall?

I'm in planning stages for a major kitchen remodel. Home built in 1984 with PEX plumbing, all electric, etc. We would like to demo the kitchen soffit (bulkhead) to make the ceiling level and install ...
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59 views

Can you use wirsbo/uponor/expansion pex for underground sprinklers?

I cant find much information around this online, it appears that its possible.
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1k 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 ...
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1answer
445 views

PEX Outdoor UV Protection

PEX must be protected from UV A Florida bypass will require 20 feet of pipe be outdoors: it is in a rectangular tunnel, where it is mounted to concrete overhead, but sunlight illuminates the ...
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1answer
150 views

Is it normal for installed PEX piping to be curved or bowed?

Red PEX is curling or bowing throughout the main hot water line from hot water tank feeding all the faucets and showers. Is this normal?
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3answers
278 views

When using using 3/4 PEX for cold water in a bathroom that has shower, sink and toilet, do I need to reduce to 1/2 when I am branching to the fixture?

I was advised to use 1/2 PEX for the hot water and 3/4 Pex for the cold water The bathroom has shower, sink and toilet Do I need to reduce to 1/2 when I am branching to the fixture ? I can't find ball ...
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1answer
169 views

Do I need a floor drain for the water heater in my townhome?

I’m looking at replacing an 11-year-old water heater as the hot water has become extremely discolored recently. I have flushed it twice in five years (I know, not enough) and could never remove the ...
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0answers
85 views

Can red dye cause premature failure in pex tubing?

I've been told that red pex had a higher failure rate because of some flaw introduced by the red dye in it. Has anyone heard anything like that? I can't find anything online about it so far.
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123 views

Running PEX exposed along garage ceiling for spigot

I was planning on running PEX-A from my basement, through my garage to the exterior cement brick wall (20-30 ft) and down where I'd like to put a small spigot (maybe will a small run of copper along ...
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3answers
27k 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 ...
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6answers
13k 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 ...
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1answer
120 views

Does anyone recognized this PEX Crimp System (Make/Model)?

Does anyone recognized this product? Looks like a good idea. There is this red spacer ring to help position and hold the crimp ring in the right place. I want to know more about it.
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1answer
205 views

Frozen PEX in exterior shower wall

The temp dropped to zero last night and the shower head mounted on an exterior wall has no water flow: frozen PEX line. There is no access to this space from above or below. If I use a hair dryer on ...
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4answers
283 views

Pipes on Exterior Wall

I recently had frozen pipes in my basement. I took some drywall down to identify the location of the frozen pipes and to apply heat to thaw it. It appears the frozen section is somewhere about halfway ...
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2answers
29 views

T tap with valve for pex?

This picture is of a 1/4 inch PEX line from a reverse osmosis filter. This section is right before a remineralization cartridge. The water before that cartridge is fairly close to being distilled ...
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2answers
40 views

Brass push-fitting pipe insertion depth (standard or varies by brand?)

I have a 90-degree "elbow" 1/2 (both sides) brass push-fitting installed by previous owner. I'm replacing the PEX pipe. I don't know the brand of the fitting but it is NOT SharkBite. Do all ...
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1answer
83 views

Can PEX be installed in sections?

I have an older house with lots of pinhole leaks in the copper pipes. From what I have been told, you have to replace the pipes, copper or PEX or maybe something else. I am trying to avoid the ~$10k ...
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2answers
3k views

Pex Pipe Freezing & Tankless Hot Water Heater Too

I have Pex pipes. My issue is freezing pipes and tankless hot water heater on the north side of my house (built in 2009) where my master bath is (the tankless is on the outside of the house on that ...
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2answers
603 views

How to protect PEX pipes from puncture

I'm replacing the copper pipes in my house and I'm converting the trunk and branch type to home run style using PEX A pipes. I want to protect the pipes in the wall that I'm running them up from the ...
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17answers
99k 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?
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1answer
241 views

What size manifold for 1" pipe from meter? [closed]

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 ...
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1answer
3k views

Pex Connections As Unions?

I've noticed that in a properly (I assume) crimped Pex connection the tubing will rotate around the fitting it is crimped to - so that you have, in effect, a union. So, I'm wondering: Is that how it ...
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2answers
247 views

Basement bathroom PEX branching to fixtures

We're plumbing our new basement bathroom. The nearest fixture from the main hot/cold water line will be the vanity sink. Can I run from the main line to the vanity sink (one faucet), and then branch ...
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2answers
435 views

Water flow with plastic and brass pex fittings

Is the smaller ID on plastic fittings (for pex) "smaller enough" than brass to have an effect on water flow through the pipes? I'm trying to do everything I can to get the most possible ...
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3answers
2k views

Can I replace hydronic water boiler return pipes with pex?

My house was built in the 1920s, the heating source was a hot water/radiator system. Originally the basement was probably used only for a coal furnace (we have the drop-off door that the coal guy used ...
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2answers
1k views

PEX pipe burst: what else needs to be fixed to prevent it happening again?

I'm a renter in NYC and our 4-story building has recently-installed (within the last 8 years) baseboard hydronic heat. All of the tubing is PEX, except for from the boiler itself (as required by code) ...
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1answer
2k views

Burying PEX Pipe in the ground

Revised: September 27, 2020 @ 4:30 PM. Background Information This is an existing installation by a national builder. I had to dig up this section for another reason and found a PEX splice. I wanted ...
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1answer
48 views

PEX - Do not install tubing above or below septic tanks, leach fields, pits, or cesspools - why?

I am reading the "Installation Manual for Viega PureFlow Water System" and on page 41 it states: Do not install Viega PureFlow PEX tubing where soil is or may become contaminated with ...
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33 views

heating system backwards?

I have an outdoor wood boiler about 40' from my house. It is piped to a heat exchanger on the water tank, and then to the oil furnace(doesn't burn oil). I think the supply and return have been ...
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1answer
59 views

Water feed pipe diameter: is 1/2" OK?

The 3/4" water feed in a slab has a leak. A proposed bypass includes a 1/2 inch PEX, run through the ceiling. Why should a 1/2 inch PEX be used to bypass and not a 3/4 inch? Assume that the ...
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1answer
30 views

Threaded Brass adapter leak

A pair of adapters is bridging CPVC to PEX. The pair is coupled through threaded brass: PTFE Teflon tape was applied. There is a very slight leak in the brass threading. Any suggestions remedy the ...
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0answers
16 views

PEX / CPVC leak-test

The leak check includes a visual self-inspection of each end of a pressurized new PEX pipe. The PEX is to be piped into existing CPVC: the plan is to leak-check every 12 hours. How many days should ...
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1answer
203 views

PEX minimum radius of curvature

The photographed PEX radius of curvature is approximately 2 feet. What is a reasonable curvature for PEX piping? What is the minimum RoC? I ask because if I can avoid using a 90 degree shark bite, ...
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1answer
179 views

Replacing polybutylene pipe to add a new outdoor spigot (freeze proof sillcock)

I need to replace the entire outdoor spigot (sillcock), the shutoff valve that goes with it (because it is old and leaking), and some polybutylene pipe in the process. I have included several photos ...
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21answers
240k 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 ...
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4answers
13k 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 ...
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1answer
207 views

Can you use PEX for venting?

Is there such an option as using PEX for an 1-1/2 vent ? I have a stretch where I need some flexibility for my pipe which is going to be difficult to achieve with copper or ABS. this is related to ...