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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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
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1answer
535 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
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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
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1answer
624 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-...
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0answers
1k views

Pulsing water with PEX tubing?

Our home is plumbed with PEX tubing, from what I can tell. When summer started, the shower started running hotter, so we turned down the shower lower and lower. But when we reached a certain place ...
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1answer
38 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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0answers
103 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 ...
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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 ...
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2answers
370 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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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 ...
1
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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 ...
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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 ...
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0answers
124 views

What Pex system and re-design would you use for this small bungalow update - Floor Plans Attached?

There is a small Bungalow in the Midwest that I have attached two new design drawings for. Its a smaller 740sqft home with a 1st floor and current unfinished basement. I wanted to see if the group ...
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0answers
200 views

Can Zurn oxygen barrier pex radiant heating pipe be used for potable water?

Is it safe to use some oxygen barrier Zurn hydronic heating pipe for potable water?
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0answers
136 views

Replumbing a Four Family with PEX

Glad I found this site, happy to be on here and I look forward to learning from the crew and sharing. In any case, I'm in the process of buying a four family. I have it under contract, am buying at a ...
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30 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 ...
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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 ...
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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
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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, ...
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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). ...
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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 ...
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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 ...
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0answers
209 views

Alternative attachment to concrete floor containing pex heat tubes

I am getting ready to finish my basement. The counties "Typical Finished Basement Details" say that bottom plate attachment to floor is with 16D concrete nails face nailed. What are USBC approved ...
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0answers
1k views

How do I flush and pressure-test a PEX system?

I have all the information on how to install the PEX plumbing system, but nothing on how to flush it or how to pressure test the PEX system. Can someone help?
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1answer
813 views

Pipe Size from well to house

I'm new to owning a house with a well and am looking to clean up piping and well equipment as it is all from the 70's and I'm experiencing strong sulfur smells in my water. From the specs I've ...