Article Introduction
They look pretty similar. They’re both made from the same form of unplasticised PVC (PVC-U) but the difference is in the wall thickness. Schedule 40 upvc pressure pipes and fittings are made with thicker walls that stand up to low pressure applications. Whereas PVC DWV piping has thinner walls and is not made for pressurized applications.
ARTICLE CONTENT：
- What is PVC
- Are PVC pressure pipe and PVC DWV pipe the same
- What are the main differences between PVC pressure pipe and DWV pipe
- What are the applications in PVC pressure pipe and DWV pipe
- About SAM-UK
What is PVC？
Way back in 1835 the French Chemist H V Regnault prepared vinyl chloride in a laboratory and he observed that in sunlight it changed forms. This new form became known as Polyvinyl Chloride (PVC). Over time, it was discovered that by adding different chemicals to it, PVC could become much more flexible. It became plasticized.
In the 1930s, PVC started appearing on the commercial market in different forms. It was being used to make vinyl records, raincoats, thin sheeting and pipes. The benefits of PVC pipes soon became clear. They were light, easy to use and cost-efficient, compared with pipes made from concrete or copper.
As its use in piping evolved, so did the types of PVC piping, two of those types being schedule 40 PVC pressure pipe and PVC DWV pipe.
Are PVC pressure pipe and PVC DWV pipe the same?
Sometimes there can be confusion over them and it’s easy to understand why. They look pretty similar. They’re both made from the same form of unplasticised PVC (PVC-U) but the difference is in the wall thickness.
Schedule 40 plastic pressure pipe are made with thicker walls that stand up to low pressure applications.
Whereas PVC DWV piping has thinner walls and is not made for pressurized applications.
Another thing that can cause confusion sometimes is the end types. Usually both types of pipes are slip fitting, but some PVC DWV pipes and fittings schedule 40 upvc high pressure pipes & fittings are made with threading and to the same size as each other. Because of this they’ll fit together, but it’s not recommended.
Using them together in the same piping system can lead to major problems. It could even end in disaster if non-pressure pipes end up being used in pressure applications.
What are the main differences between PVC pressure pipe and DWV pipe？
There are a number of main differences between PVC DWV pipe and schedule 40 high pressure plastic pipe fittings.
PVC DWV PIPE:
- Have thinner walls
- Because of this they are less expensive than schedule 40 high pressure pvc water pipe
- Are not made for handling pressure
- Come with a few specialized parts including p-traps, drains and cleanouts
Because of these differences, their applications are vastly different. Let’s take a look at their applications.
What are the applications in PVC pressure pipe and DWV pipe?
We mentioned one of the key differences is their thinner walls, made for non-pressure applications. This means the types of pipe systems they suit are for Drain, Waste and Vent. This is why they’re called DWV. It signifies the three applications.
PVC DWC piping is also used in above ground plumbing and drainage in buildings, and underground sewerage and drainage in buildings and infrastructure.
On the other hand, schedule 40 high pressure plastic water pipe and high pressure pvc coupling is used in gas distribution, heating and cooling systems, fire protection installations, water supply and distribution.
About SAM-UK
SAM-UK are a professional 18+ years manufacturer in producing vinyl building profile products and PVC,CPVC, PPH,PPR,PP pipes and pipe fittings, valves, taps and so on. We own the certificates of SGS\SONCAP\ISO9001\CE\NSF，support color /size customization. Welcome to consult for Catalog and Product. you can contact us at email sales@sam-uk.com
