l***y
发帖数: 554 | 1 昨天去看正在建的房子了
发现水管居然用的都是塑料的
红色的热水 蓝色的冷水
然后在这种塑料管子上面再包裹一层泡沫塑料
可能是保温作用吧
觉得很不可思议~怎么用这种材料
因为在国内自己有装修过房子，国内用的内芯都是铜的，还挺贵的
卖材料的都会强调自己卖的水管内芯是铜的，质量好
是不是这种塑料水管比较适合美国的房子
国内的房子楼太高，水压太强，需要铜的 |
e********t
发帖数: 9607 | 2 铜的其实还有一个缺点就是导热性比塑料好，不加绝缘的话热水能量损耗更多。
diy的人都喜欢塑料，切割连接都很容易。
【在 l***y 的大作中提到】
: 昨天去看正在建的房子了
: 发现水管居然用的都是塑料的
: 红色的热水 蓝色的冷水
: 然后在这种塑料管子上面再包裹一层泡沫塑料
: 可能是保温作用吧
: 觉得很不可思议~怎么用这种材料
: 因为在国内自己有装修过房子，国内用的内芯都是铜的，还挺贵的
: 卖材料的都会强调自己卖的水管内芯是铜的，质量好
: 是不是这种塑料水管比较适合美国的房子
: 国内的房子楼太高，水压太强，需要铜的
|
l***y
发帖数: 554 | 3 现在国内的水管有绝缘的，内芯是铜，外面包裹了一层pvc材料
【在 e********t 的大作中提到】
: 铜的其实还有一个缺点就是导热性比塑料好，不加绝缘的话热水能量损耗更多。
: diy的人都喜欢塑料，切割连接都很容易。
|
N**s
发帖数: 1916 | 4 用井水的话也是塑料好, 井水eats copper.
【在 l***y 的大作中提到】
: 昨天去看正在建的房子了
: 发现水管居然用的都是塑料的
: 红色的热水 蓝色的冷水
: 然后在这种塑料管子上面再包裹一层泡沫塑料
: 可能是保温作用吧
: 觉得很不可思议~怎么用这种材料
: 因为在国内自己有装修过房子，国内用的内芯都是铜的，还挺贵的
: 卖材料的都会强调自己卖的水管内芯是铜的，质量好
: 是不是这种塑料水管比较适合美国的房子
: 国内的房子楼太高，水压太强，需要铜的
|
H******7
发帖数: 34403 | |
l*****o
发帖数: 26631 | 6 铜的缺点是时间长了会腐蚀掉。。。
我爸来这边后也对这边大量用塑料材料觉得不可思议，不过后来他说这边的塑料质量明显要比国内的好很多。 |
H******7
发帖数: 34403 | 7 经孔教授鉴定，你爸为汉奸
明显要比国内的好很多。
【在 l*****o 的大作中提到】
: 铜的缺点是时间长了会腐蚀掉。。。
: 我爸来这边后也对这边大量用塑料材料觉得不可思议，不过后来他说这边的塑料质量明显要比国内的好很多。
|
h*d
发帖数: 214 | 8
WTF?
【在 H******7 的大作中提到】
: 经孔教授鉴定，你爸为汉奸
:
: 明显要比国内的好很多。
|
w********r
发帖数: 8704 | 9 塑料便宜
【在 l***y 的大作中提到】
: 昨天去看正在建的房子了
: 发现水管居然用的都是塑料的
: 红色的热水 蓝色的冷水
: 然后在这种塑料管子上面再包裹一层泡沫塑料
: 可能是保温作用吧
: 觉得很不可思议~怎么用这种材料
: 因为在国内自己有装修过房子，国内用的内芯都是铜的，还挺贵的
: 卖材料的都会强调自己卖的水管内芯是铜的，质量好
: 是不是这种塑料水管比较适合美国的房子
: 国内的房子楼太高，水压太强，需要铜的
|
M********I
发帖数: 848 | 10 可以加钱改铜管。
原来打算盖新房时，跟builder谈，就是到厨房的管道用铜管。好像当时谈到时候，只
换这一段也没加钱。 |
|
|
s*8
发帖数: 1933 | 11 完蛋了，我居然发现我家的水管是铁的，而且是那种很粗很粗的铁管，和国内那种自来
水管一样的，怎么办，会不会生锈呢？
【在 l***y 的大作中提到】
: 昨天去看正在建的房子了
: 发现水管居然用的都是塑料的
: 红色的热水 蓝色的冷水
: 然后在这种塑料管子上面再包裹一层泡沫塑料
: 可能是保温作用吧
: 觉得很不可思议~怎么用这种材料
: 因为在国内自己有装修过房子，国内用的内芯都是铜的，还挺贵的
: 卖材料的都会强调自己卖的水管内芯是铜的，质量好
: 是不是这种塑料水管比较适合美国的房子
: 国内的房子楼太高，水压太强，需要铜的
|
m********c
发帖数: 13337 | 12 这才是真正的原因。
其他的只是借口。
【在 w********r 的大作中提到】
: 塑料便宜
|
k*****a
发帖数: 7389 | 13 塑料水管 is illegal here!
Any licensed plumber uses 塑料水管 will get his license revolved!
Do be stupid! |
m**a
发帖数: 1228 | 14 听说过pex plumbing吗？
【在 k*****a 的大作中提到】
: 塑料水管 is illegal here!
: Any licensed plumber uses 塑料水管 will get his license revolved!
: Do be stupid!
|
C*******d
发帖数: 15836 | 15 然！只听见要把朔料升级到铜的，没听说要把铜的升级到朔料的。
【在 m********c 的大作中提到】
: 这才是真正的原因。
: 其他的只是借口。
|
M********I
发帖数: 848 | 16 What is PEX?
PEX is cross-linked polyethylene. Through one of several processes, links
between polyethylene molecules are formed to create bridges (thus the term "
cross-linked). This resulting material is more durable under temperature
extremes, chemical attack, and better resists creep deformation, making PEX
an excellent material for hot water and other applications.
How long has PEX been used?
PEX was developed in the 1960s. PEX tubing has been in use in many European
countries for plumbing, radiant heating and snow melt applications since
that time. PEX was introduced in the United States in the 1980s, and has
seen significant growth in market demand and production.
What are recommended uses for PEX?
PEX 's flexibility and strength at temperatures ranging from below freezing
up to 200 degrees Fahrenheit makes it an ideal piping material for hot and
cold water plumbing systems, service lines, hydronic radiant heating
systems, snow melting applications, ice rinks and refrigeration warehouses.
Why is PEX an excellent piping material for plumbing?
PEX is ideally suited for potable water plumbing applications. It is
flexible, making it easy to install and service. PEX is able to withstand
the high and low temperatures found in plumbing and heating applications,
and is highly resistant to chemicals found in the plumbing environment.
Flexible systems are quieter than rigid piping. The smooth interior will not
corrode which can affect other materials long term pipe flow
characteristics. PEX is also very freeze- break resistant. PEX systems have
fewer joints and are easier to install providing a lower cost installation
over traditional plumbing materials.
How can I be sure that PEX is a safe product for plumbing?
PEX is manufactured and tested according to stringent national consensus
standards: ASTM F 876, F 877, AWWA C904 and CSA B137.5. Both the product
manufacturer and independent third party testing agencies conduct routine
quality control and quality assurance evaluations to insure the product
meets ASTM, ANSI/NSF International and CSA Standards. Compliance with the
standards ensures the end user of safety and quality. Additionally, PEX is
included in all of the major model plumbing codes used in the United States
and Canada; NPC, UPC, IPC and NSPC, and approved by HUD for hot and cold
potable water plumbing use.
Where is PEX approved for use?
PEX is an approved material in all the current model-plumbing codes; however
, some jurisdictions using older versions of these codes may not have
amended the code to include PEX tubing. Contact the local authority with
jurisdiction over plumbing to verify the acceptance of PEX tubing for
plumbing applications in your area.
Can PEX be used under the slab?
Yes. The flexibility of PEX allows it to be supplied in coils meaning
installations under the slab can be made in a single, continuous length
without the need for fittings. PEX is not affected by concrete, (it is
commonly encased in concrete for radiant floor heating). PEX, however, must
be sleeved when penetrating a slab.
Can PEX be used for underground cold-water service applications?
Yes. Although the high temperature resistance of PEX makes it particularly
suitable for hot and cold interior plumbing applications, it also makes an
excellent underground water service piping. The new AWWA C904 standard also
applies to PEX used in this application. PEX can be installed using the same
fittings recommended for copper tube sized SDR-9 polyethylene tubing.
Can PEX be used for aboveground outdoor applications?
No. PEX is currently designed for indoor and buried applications only and is
not recommended for outdoor, aboveground use. Short exposures to sunlight
during construction are permissible, but should not exceed the manufacturer
’s recommendations. PEX should be stored under cover, shielded from direct
sunlight or in the original packaging. In the future, PEX products rated for
outdoor use may be developed.
Can PEX save me money?
Yes. PEX saves money in many ways. For the installer, PEX tubing is
competitively priced. Installation of flexible systems is fast because of
the easy handling of the tubing and PEX installation requires fewer
directional fittings. Since most plumbing problems occur at joints, fewer
fittings also reduce the chances for leaks and callbacks, saving the
installer even more time. The homeowner saves in the cost of the installed
system, and can reduce utility costs in some layouts .
Home run or manifold plumbing systems utilizing PEX tubing can substantially
reduce water and energy consumption in a home. The home-run concept
provides dedicated direct lines from the manifold to the fixtures, reducing
the amount of water that must be purged from the lines to get hot water at
the fixture. Direct lines can be sized to the fixture requirements, further
reducing the amount of time to wait for hot water. Faster hot water delivery
reduces water waste and the amount of times the water heater must cycle to
supply hot water.
What is the expected performance of PEX water distribution systems?
PEX is designed and tested to perform as well or better than any other
material approved for hot and cold-water distribution systems. For indoor
plumbing applications, PEX is expected to perform as long as copper, CPVC or
any other approved plumbing distribution materials.
What joining systems are available?
There are several methods of connecting PEX, all of which involve mechanical
fittings. There are two approved standard specifications for PEX
connections: ASTM F 1807 and ASTM F 1960. Both reference mechanical insert
fittings. The crimp fittings specified in ASTM F1807 are the most widely
used. Other fitting systems, including insert and outside diameter
compression fittings, are also available. PEX cannot be joined by solvent
cement or heat fusion methods.
What manufacturing methods for PEX are available?
There are currently three methods for producing PEX tubing, the “Engle” or
“Peroxide” (PEX-A) method, the “Silane” (PEX-B) method, and the “E-
beam” (PEX-C) method . All three processes produce tubing that exceed the
minimum requirements of ASTM F 876 and are acceptable for potable water
distribution applications. All PEX that has been tested and certified for
potable applications carries the mark(s) of nationally recognized third-
party certification agencies such as NSF, IAPMO, ICBO-ES, Warnock Hersey or
UL.
How long can PEX be exposed to sunlight?
PEX tubing is not intended for outdoor applications and must be stored in a
covered environment not exposed to direct sunlight. Refer to manufacturer’s
instructions as to how long your pipe can have UV or sunlight exposure.
What are temperature limitations for PEX?
PEX tubing can be used up to 200° Fahrenheit for heating applications. For
plumbing, PEX is limited to 180° F. Temperature limitations are always
noted on the print line of the PEX tubing.. PEX systems are tested to and
can be used with standard T and P relief valves that operate at 210” F and
150 psi.
How are PEX systems tested for leaks?
PEX plumbing and radiant heating systems can be pressure tested using water
to check for leaks. Follow manufacturer's instructions.
How soon after installation can you pressure test a PEX tubing installation?
Most PEX plumbing systems can be tested immediately after the installation
is complete but follow manufacturer’s directions.. There is no wait time
for glue to dry or joint to cool off. Manufacturer's instructions should be
followed in cold climates.
Where is PEX available?
PEX is available through most plumbing wholesale distributors throughout the
United States and Canada. Many retail building supply outlets also supply
PEX piping and fittings. Piping and fittings are commonly available in 1/4"
through 1" CTS (Copper Tube Size) with some manufacturers also supplying
larger sizes up to 2." Because the wall-thickness is proportionate for each
size, the pressure ratings are the same for all sizes.
What sizes, lengths and packaging options of PEX are available?
PEX is available in 1/4" through 1" CTS (Copper Tube Size) and is packaged
in coils or 20' straight lengths. Some manufacturers tubing is color-coded
for easy identification of hot and cold lines. Coil lengths generally run to
a maximum of 1000' and are available in a variety of shorter lengths.
Is flexible PEX plumbed differently than rigid material plumbing systems?
Yes, the flexibility of PEX allows many directional changes to be made
without fittings. PEX systems are sized in the same manner as copper or
CPVC CTS plumbing systems. PEX piping is also used in high performance
manifold plumbing systems that takes advantage of the flexibility and cost
effective.
What are manifold plumbing systems?
Manifold, parallel or home-run plumbing systems are much like a breaker box
for the electrical system in the home. The manifold provides a common
location from which all the plumbing fixtures are supplied. Some high-end
manifolds also feature fixture shut-off valves allowing the user to shut off
the water to individual fixtures from one location. Others are semi-home
run manifolds or termination manifolds, which may feed the plumbing
requirements for a room or set of rooms and reduce the number of fittings
required in the plumbing system.
How are PEX systems sized?
PEX systems are sized just like other CTS plumbing materials such as copper
or CPVC when used in a trunk-and-branch installation. PEX can be sized in
manifold systems to meet the specific demands of each fixture, reducing
water and energy waste in the home.
Is the thermal expansion/contraction of PEX a problem?
No. While PEX expands more than other plumbing materials, directional
changes made with the tubing and some slack in the tubing during
installation accommodate the expansion and contraction of the system if
properly installed.
Is PEX freeze-break resistant?
PEX piping is freeze damage resistant and can expand and contract as water
freezes and thaws within the tubing. No tubing material is freeze-break
proof, however, and PEX should be installed using the same locally-
prescribed insulation requirements to prevent freezing of any plumbing
system.
How do I thaw PEX lines?
When water freezes inside PEX tubing, it can be thawed using a hair dryer,
warm wet rags or heat tape, taking care not to overheat the tubing beyond
the maximum recommended temperature.
Can PEX be joined with solvent cement?
No. PEX cannot be joined with solvent cement, glues or heat fusion. PEX is
installed using only mechanical fittings or compression fittings. |
e********t
发帖数: 9607 | 17 license revolve是指执照升级吗？
【在 k*****a 的大作中提到】
: 塑料水管 is illegal here!
: Any licensed plumber uses 塑料水管 will get his license revolved!
: Do be stupid!
|
p******t
发帖数: 3764 | 18 哈哈哈哈，笑得滚桌子下面去了
【在 e********t 的大作中提到】
: license revolve是指执照升级吗？
|
w********r
发帖数: 8704 | 19 可能敲错了,应该是revoke?
【在 e********t 的大作中提到】
: license revolve是指执照升级吗？
|
H******7
发帖数: 34403 | 20 PE is not only less money than the other two, it has a proven 30+ year
record of very long term service free use while being incapable of adding
anything to the water; the same as PEX and unlike copper. Copper can not
meet the NSF Standard 61 if the pH of the water to be run through it is <6.5
. Acidic and otherwise aggressive water deteriorates copper from the inside
out while adding copper to the water. Copper used underground 'has' to be
protected from the soil and/or cement or it can deteriorate from the outside
in and cause pinholes leaks.
That does not mean PEX or PE tubing is perfect They both require being laid
without coming into contact with sharp edges below or above them. UV can
damage them both as constant exposure to high chlorine content of the water
can harm PEX although I do not know about PE in that regard. I don't know
about PEX but PE can allow the infiltration of certain comtaminates through
its wall if they are present in the soil. But on avaerage and if you look at
the quality of water exiting the 'pipe', PEX and PE have the advantage.
I suggest 200 PSI rated PE. It comes in coils; usually 100', 300' and 500'.
Gary
Quality Water Associates |
|
|
e********t
发帖数: 9607 | 21 不能太cheap了。要拿金子做水管，别说塑料了，铜都不行，会被王水腐蚀掉。
只听说有人把铜管升级成金管的，没听说有人把金管升级成铜管的。
.5
inside
outside
laid
【在 H******7 的大作中提到】
: PE is not only less money than the other two, it has a proven 30+ year
: record of very long term service free use while being incapable of adding
: anything to the water; the same as PEX and unlike copper. Copper can not
: meet the NSF Standard 61 if the pH of the water to be run through it is <6.5
: . Acidic and otherwise aggressive water deteriorates copper from the inside
: out while adding copper to the water. Copper used underground 'has' to be
: protected from the soil and/or cement or it can deteriorate from the outside
: in and cause pinholes leaks.
: That does not mean PEX or PE tubing is perfect They both require being laid
: without coming into contact with sharp edges below or above them. UV can
|
d****2
发帖数: 6250 | 22 这也能吵起来？ 铜管还是不错的，如果王水腐蚀了，担心的应该不是水管，是这水质
喝下去长期效果。 |
k*****a
发帖数: 7389 | 23 it's not 铜管不错, it is 铜管 is required by regulations and city codes.
you should mind your health too |
H******7
发帖数: 34403 | |
w********r
发帖数: 8704 | 25 没吵,正常学术交流,呵呵
【在 d****2 的大作中提到】
: 这也能吵起来？ 铜管还是不错的，如果王水腐蚀了，担心的应该不是水管，是这水质
: 喝下去长期效果。
|
v***s
发帖数: 4031 | 26 可能是你住的地方的建筑标准不一样。我装修房子很多次，进水的都是金属的，铁的或
是铜的，排水的大部分是塑料的，也有金属的。
【在 l***y 的大作中提到】
: 昨天去看正在建的房子了
: 发现水管居然用的都是塑料的
: 红色的热水 蓝色的冷水
: 然后在这种塑料管子上面再包裹一层泡沫塑料
: 可能是保温作用吧
: 觉得很不可思议~怎么用这种材料
: 因为在国内自己有装修过房子，国内用的内芯都是铜的，还挺贵的
: 卖材料的都会强调自己卖的水管内芯是铜的，质量好
: 是不是这种塑料水管比较适合美国的房子
: 国内的房子楼太高，水压太强，需要铜的
|
C*******d
发帖数: 15836 | 27 排水的基本上没有任何水压，而且也没有太多的腐蚀/保温等问题，所以对水管的要求
低得多。
【在 v***s 的大作中提到】
: 可能是你住的地方的建筑标准不一样。我装修房子很多次，进水的都是金属的，铁的或
: 是铜的，排水的大部分是塑料的，也有金属的。
|
S*A
发帖数: 7142 | 28 塑料有很多种，例如 CPVC 和 PVC 就不是一个东西。
最便宜的 PVC 接引用水是不对的，会有化学物质的东西
释放到水里。 CPVC 是氯处理过的，价格就比 PVC 贵很多
了。就算用 CPVC， 沾管子的胶水也有讲究是不是引用水
可以用的。绝大多数常见的都不是。基本上老莫用的都不
讲究这些的。
用塑料有很多偷工减料的方法造成有害的或者违反规定
的都不知道。我个人觉得饮用水还是避免使用塑料的管道。
不是说用朔料的一定违反规定，只是这个环节有很多地方
可以出猫腻。铜的猫腻就是少很多，承受压力也大，没有 UV
问题。我还是喜欢铜的。 |
H******7
发帖数: 34403 | 29 你说的不对。市政水管用的最多的就是PVC管。美国大约占塑料管的90％。
【在 S*A 的大作中提到】
: 塑料有很多种，例如 CPVC 和 PVC 就不是一个东西。
: 最便宜的 PVC 接引用水是不对的，会有化学物质的东西
: 释放到水里。 CPVC 是氯处理过的，价格就比 PVC 贵很多
: 了。就算用 CPVC， 沾管子的胶水也有讲究是不是引用水
: 可以用的。绝大多数常见的都不是。基本上老莫用的都不
: 讲究这些的。
: 用塑料有很多偷工减料的方法造成有害的或者违反规定
: 的都不知道。我个人觉得饮用水还是避免使用塑料的管道。
: 不是说用朔料的一定违反规定，只是这个环节有很多地方
: 可以出猫腻。铜的猫腻就是少很多，承受压力也大，没有 UV
|
