Submitted 1 year ago by ALostInquirer@lemm.ee to nostupidquestions@lemmy.world
I have some decent ideas as to why, I’m asking mainly as a hopefully fun contribution here, and to maybe learn some interesting plumbing info!
Plumbing Apprentice here. Garden hoses wear out in 5-10 years, and ideally the water and drainage pipes will be there for decades.
Do they wear out because they’re exposed to the elements and movement, or because of their material? I read that as “what if you were to put a hose in the wall?” Would its rate of degradation be the same as say a pvc pipe?
Over time the rubber of the hose dries and cracks, and the elements/movement can expidite that process. I guess a hose inside of a wall could last much longer depending on the material. If they were made in the same way Fernco fittings are made, they could last a just as long (Fernco claim the fittings can last 50 years, but the company has only been around for ~50 years so the claim can’t really be tested).
Pvc is designed to last 50 years but some people claim that its useful lifespan is 75-100 years, but Pvc hasn’t been around long enough to test the 100 year claim.
Huge disclaimer that I’m not a plumber or even close to a plumber, but I did have a house and think about houses:
Isn’t the current “standard” plumbing PEX plumbing, which is basically just a bunch of hoses?
Like I think you’re on to something but the industry beat you to the punch 😉
I recently had to have my 1980s house’s water main connection replaced because they used some experimental flexible hose material from the late 80s and it’s all starting to embrittle and fail now. Wouldn’t have happened with PEX…
I’ve been reading about PEX now and it sounds like it only became commercially viable to produce in large volumes in the 1990s, even thought it’s existed as a form of polyethylene since the 1930s. It’s just now becoming cheap enough to be used everywhere because it’s obviously better and we have lots of material performance data on it.
Polybutylene. Yeah bad times if you’ve plumbing made out of it the US.
some experimental flexible hose material from the late 80s
I got you beat there. My house had cardboard sewer pipe. Orangburg pipe.
Isn’t a pipe just a stronger hose?
Pass me that blunt
I work in construction and will give you the common viewpoint (non-US).
We use PVC pipes to drain used water and PPRC pipes to supply fresh water to flats in an apartment. These are all installed to be practically permanent. The concrete is put in place on top of these pipes.
I imagine hoses can be used for the same purpose, but the price would be simply higher and no investor would prefer hoses over pipes for this reason. If there is a type of hose that is as effective as these pipes and as affordable, it’s not available in my region
After doing plumbing professionally for 10 years I’ve come to the conclusion that the main reason is difficulty of insulating PEX once it’s installed. Plumbers don’t generally do insulating in commercial jobs. There’s inherently no such differences in quality that would make PEX unsuitable for most applications. Still we seem to prefer either composite pipe for water or steel for heating. PEX mainly when it’s installed somewhere you can’t check for leaks later bexause with PEX you can do it with minimal to no joints. Underfloor heating for example.
The standard PEX is somewhere in the middle- a stiff hose.
I would call most plumbing as hoses as they are using flexible plastics in most installations. Pipes are generally referred to as rigid items. But that is selective even. Hoses under some definitions are pipes with multiple layers. Ie. Rubber and a metal mesh grid for strength.
Think the definitions are quite interchangeable. We simply use the cheapest most dependable option available that adheres to code.
Hoses are much more useful if they can bend and be coiled up. Pipes usually are quite hard to bend.
While I’m not a plumber there is something to consider as well.
I think this is why something like Pex works well since it’s flexible while not being so flexible that you’d have to worry about long term abrasion and wearing away from a hose bouncing back and forth from it.
Pex is also resistant to bursting in the event of freezing. I used pex in my van build and the few times the pipes have frozen haven’t resulted in any issues other than having to wait for the pipes to thaw.
But water hammer is an understood, fixable problem. It’s mostly that modern appliances have solenoid valves that switch too quickly for older piping found main most peoples homes. Even then, a water hammer arrestor will usually cover it
dope@lemm.ee 1 year ago
Because until recently flexible pipes were hard to do, technology-wise.
But now we have pex. And pex is actually pretty scifi stuff. They zap it with rays to make the molecules link up better. It’s like superpowered rubber.
Lev_Astov@lemmy.world 1 year ago
I thought PEX was just an industry term for HDPE pipes, but no, you’re right. The X stands for crosslinked and irradiation is one of (the more expensive) ways of achieving it. It sounds like most common PEX is made by adding peroxides to the HDPE or LDPE before extrusion and the chemical causes the thermoplastic to become a thermoset after the heat and pressure of the extruder. Neat stuff.
LeadSoldier@lemmy.world 1 year ago
Ah! I was wondering how sick a seemingly simple hose had a corner on the market. Apparently it’s not a simple hose at all!
someguy3@lemmy.ca 1 year ago
It sounds like you may know. Does PEX have all those same concerns about plastic water bottles, the BPA and people say there are many more chemicals that didn’t get the same attention.
dope@lemm.ee 1 year ago
I never heard any such concerns.