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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Need help planning reroute of cold water line

Recently purchased a house and am in the middle of replacing the lead water service line along with what I think are more lead pipes. From the water service line, the pipe goes underground then re-...
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PEX Plastic fitting

Can I use a copper clamp ring which has F1807 written on it with a plastic (poly) fitting? It seems like F1807 should only be used with brass (as ASTM states). I understand ASTM F2159 describes copper ...
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How can I create a plumbing disconnect for winterizing a cottage?

I have a summer cottage where, each year, I need to unhook a few pex connections to drain the system so that it doesn't freeze. I'm re-working the system this spring, and want to design it so that it'...
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Which is better, brass or plastic fittings for pex-a pipe (which uses expansion fittings)?

We are replumbing an old house with pex-a in a north central Texas. I have seen pros and cons for using brass vs plastic fittings. There does not seem to be a consensus on the best choice. Price is ...
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2 answers
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Two reducers in-line from air compressor to air tool?

Previous house owner run PEX pipe in the garage from a 60 gal air-compressor to multiple hose reels. One of them developed a leak and I had to cut through copper pipe to remove it - it was all hard-...
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PEX Homerun vs T&B with 1/2in Supply

I'm adding a small bathroom to my detached garage. I've read lots on home run vs trunk and branch, I've got a pretty good idea of the pros and cons of each. Issue for me is, I've got 1/2in copper ...
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3 votes
4 answers
569 views

Elbow or just bend PEX pipe through wall

I have this PVC piping: It comes out the basement wall, up the exterior wall, and then back through the bathroom wall. One pipe is carrying hot water, and it's leaking so I want to change for more ...
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How to have a tub faucet, shower head, and rain shower head?

I am remodeling my bathroom and installing a new bathtub. I would like to have the tub outlet, a shower head outlet, and a ceiling rain outlet. I would like to use the rain shower head and the normal ...
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254 views

How do I connect Pex Line to Braided Hose?

I have a singular Pex type B hot water line running to my sink specifically for dishwasher hookup, however my dishwasher has a threaded hose line running from it to reach the sink. How/what do I do to ...
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Any issues with putting foam around a pex rough in?

I don't like the idea of drilling the holes required to attach the below cover for the blue pex pipe The plan is to use silicone or PL to glue the cover to the tiles I did try to test drill in piece ...
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Would there be a problem running a whole house water filter in line like this?

I am in the process of changing the 50 year old copper plumbing in my house to PEX. I wanted to install a filter and scale inhibition system in line right after the valve and meter coming in from ...
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Is there an adhesive that I can use to install this PEX tube cover?

The tiles are porcelain The PEX cover tube is like this one Typical installation is like this but I am not sure if the tile is not going to crack in my situation the hole around the pipe is not like ...
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3 votes
1 answer
712 views

Can I pull ethernet cable through 1/2" pex?

I have an exterior garage that I need an ethernet cable in for a desktop computer, but it's surrounded by a concrete slab and brick patio (seemingly making it impossible for me to run it underground). ...
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2 votes
3 answers
880 views

How do I Loosen a Stuck Threaded Brass Fitting?

I’m about to replace some of the brass water pipes to PEX in my basement. I bought an adapter fitting at a plumbing supply store(picture 1) and cut the cold water pipe(picture 2). I tried to remove ...
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1 vote
1 answer
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Is PEX okay with the high temperature steam?

I’m about to replace my old cooper pipes to PEX. There’s a steam pipe and a branch attached in 90 degree to release some steams. The thing is, the cold and hot water pipes are right above the steam ...
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3 votes
2 answers
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How can I tell PEX from polybutylene pipe?

There's a blue pipe (1" diameter) extending ~3 feet from the city water meter before transitioning to 1" copper, then the copper connects 2 feet later to my rusted galvanized. I've run new ...
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How best to change a section of PEX hot water return line between two FIP tee fittings?

I want to change the section of PEX hot water return line between the 1/2" tee fitting near the floor beam and the 3/4" tee fitting at the water heater drain. I want to keep it simple with ...
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4 votes
2 answers
524 views

What material pipe to carry water to a detached garage

Location: California. The water service to my house arrives with some sort of plastic material pipe (I would assume this is the original material used in the 70s when this house was built). I now plan ...
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Does PEX-B support expansion fittings?

PEX is a type of plastic piping used in buildings. It's an old technology but the variant PEX-A (frequently known by the brand name Uponor) has come to be viewed largely as the better variant because ...
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1/4 copper to 1/2 PEX to 1/4 copper?

I have an old home that has a 1/4 copper line running from a copper valve tee in the basement, directly up through the floor boards, into the fridge. I'm trying to add an ice maker valve box behind my ...
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Mixing PEX A and PEX B?

I want to run 1" trunk and 1/2" branches to fixtures, and would prefer to use PEX A mainly for its flexibility. Unfortunately my local stores only carry PEX A in 1/2 and 3/4 sizes. Would it ...
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3 votes
2 answers
321 views

repiping house with PEX [closed]

1950s house with original galvanized pipes. Looking to repipe with PEX. Currently low water pressure, takes minute(s) for hot water to reach back of house, very hard water with occasional orange/brown ...
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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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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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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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1 vote
4 answers
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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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1 vote
2 answers
118 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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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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8 votes
2 answers
3k 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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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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1 answer
348 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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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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2 votes
3 answers
2k 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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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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1 vote
1 answer
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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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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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1 answer
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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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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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-1 votes
1 answer
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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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4 answers
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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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3 votes
2 answers
382 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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1 answer
151 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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2 votes
2 answers
1k 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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1 vote
2 answers
661 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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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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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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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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1 vote
1 answer
3k 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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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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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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