P trap Raw Material Guide 101

In this blog post, you’ll read:The best solution for an engineer is always different based on the application and project conditions. When selecting the finest material for a P trap, you must consider factors such as cost, durability, performance, and other characteristics.

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Which Is the Best Material For the P trap?

The best solution for an engineer is always different based on the application and project conditions. When selecting the finest material for a P trap, you must consider cost, durability, performance, and other characteristics. The following are the most popular materials utilized in P traps: copper, brass, PVC, CPVC, and others. Each of these four materials, as well as a few others you could come into during construction, will be discussed in this article.


Since the 1960s, copper has been used for P traps because it is very durable. Even though other materials have been introduced since then, copper is still one of the best options because it can last for a long time without needing to be replaced. The main disadvantage of using copper piping is its high cost.

Copper p-trap
Copper p-trap

In addition, soldering and additional fittings are required to install it properly. Using copper for your P trap might save you money in the long term, even if it may cost more upfront since you won’t need to repair it as frequently. Copper is also a good choice because it is corrosion-resistant and can withstand high temperatures. When made correctly, a P trap made from copper can last many years without leaking or breaking. Copper is the way to go if you want a durable, long-lasting option.


  • Leaks resistant
  • Proven reliability since the 1960s
  • Durable
  • It does not pollute water.
  • Heat tolerant
  • Long lifespan
  • Old pipes can be recycled
  • Corrosion resistant


  • Lead solder is sometimes used in older installations.
  • Copper pipes manufactured from solid or recycled old copper pipes can be reused. Still, copper mining and refining have environmental consequences. As a result, copper isn’t considered an environmentally friendly material.

Additionally, copper pipe is utilized in various applications, such as refrigerant lines for HVAC systems and hot and cold water supplies. The thickest-walled type of copper pipe, Type K, is frequently used for underground utility lines. Type L has intermediate walls, whereas type M has the thinnest walls and is used primarily for wall supply lines.

Regular Copper P trap types and specs available in the market:

Sizes of copper P-trap
Sizes of copper P-trap


As any plumber knows, brass is one of the most popular materials used in plumbing today. Its corrosion resistance and excellent machinability make it ideal for water supply lines, drains, pump fittings, and other plumbing applications.

Brass is also an excellent heat conductor, making it a desirable choice for water tanks and wells. Thanks to these many advantageous properties, brass piping is one of the most popular materials used in plumbing today.

Brass P-trap
Brass P-trap

P trap and other plumbing parts made from brass are some of the most reliable on the market. So, brass is an excellent choice if you’re looking for a material that can withstand years of wear and tear.


  • Highly resistant to corrosion
  • Heat resistant
  • Soft material, which allows tight seals
  • Physical properties similar to copper
  • Long service life


  • It may contain lead.

Regular Brass P trap types and specs available in the market:

P-trap size standard

Polyvinyl Chloride (PVC)

PVC is a common material used in P traps, and it comes in two sizes, Schedule 40 and Schedule 80.

  • Most residential fences are made of Schedule 40 PVC, with thinner walls and a lower price than other types.
  • PVC with schedule 80 walls is more expensive, durable, and expensive.

The American National Standards Institute (ANSI) maintains tables that describe the outer diameter of PVC pipes. The advantages and disadvantages of using PVC as a pipe material are compiled in the following table.

pvc p trap drain pipe
pvc p trap drain pipe


  • Resistant to rust and corrosion
  • Resistant to high water pressure
  • Low cost
  • Easy installation, no welding or metalwork
  • Versatile: multiple sizes and fittings
  • Strong and durable
  • Nonconductive


  • It cannot be used for hot water since heat deforms PVC.
  • UV radiation causes PVC to deteriorate; hence, sunlight exposure is not permitted.
  • Not safe for drinking water.
  • Not recyclable.

PVC, or polyvinyl chloride, is a type of plastic frequently used in plumbing. It is solid and durable, making it an ideal material for drain lines. PVC can also be used for indoor P traps, underground plumbing, vent stacks, central water supply lines, and high-pressure piping.

PVC is also used for sewage drainage systems. One advantage of PVC is that it corrodes less than other metals. Another benefit of PVC is its connections with a wide range of piping, making it a flexible option for plumbing applications.

Regular PVC P trap types and specs available in the market:

pvc trap specifications
PVC trap specifications

Chlorinated Polyvinyl Chloride Piping (CPVC)

CPVC stands for Chlorine-PVC Violet. It is a high-chlorine variant of PVC piping. Although standard PVC isn’t suitable for hot or drinking water, CPVC is. Copper pipes are rougher and make no sound when water flows through them, whereas CPVC pipes are smoother and produce fewer vibrations.

Besides being more flexible than metallic pipes, CPVC piping is insulated to avoid energy loss. It is fire-resistant as well as smoke and heat-resistant.


  • Water that may be drunk safely
  • simple to install
  • may transport hot water
  • more adaptable than PVC and aluminum pipe
  • PVC advantages with added durability
  • Fire resistant
  • Nonconductive
Cpvc p trap
Cpvc p trap


  • CPVC pipes split when frozen
  • Not recyclable
  • More expensive than PVC
  • The manufacturing process is highly polluting

Common uses for CPVC pipes include water and waste drains and hot and cold water supplies. Circulation systems (valves, fittings, and elbows) also commonly utilize CPVC pipe because it is flexible.

Its ability to resist heat without softening has made it popular among environmental engineers. It’s ideal for constructing tunnels under pesky roots or other barriers that would prevent the passage of sewage pipes through your property’s infrastructure.)

Regular CPVC P trap types and specs available in the market:

Fits pipe dimensions
Fits pipe dimensions

Galvanized Steel

This product was formerly widespread, but because of its hazardous consequences, it has been abandoned:

  • Due to the zinc covering, internal corrosion occurs in pipes of tiny diameters.
  • It can get clogged over time
  • Corroded pipes can release lead
  • Water discoloration
galvanized steel p-trap
Galvanized steel p-trap

Galvanized steel pipes are heavy-duty and can withstand a lot of wear and tear, making them ideal for drains that see a lot of use. However, because of their weight, they are only suitable for P traps, where the weight isn’t an issue.

These pipes were frequently used in greywater and non-potable water drains, as they can withstand high-stress levels without breaking. In addition, galvanized steel pipes are resistant to corrosion, which makes them ideal for use in drains that come into contact with harsh chemicals or other corrosive substances.

Stainless Steel

stainless steel P trap
stainless steel P trap

Stainless steel is a robust and durable metal that is resistant to corrosion. Because of this, it is an excellent option for plumbing parts, especially in locations with a risk of corrosion, such as along the coast.

Stainless steel pipes are more expensive than copper pipes, but they will last longer and require less maintenance. If you are concerned about the cost, you can look for high-quality stainless steel pipes certified. This will ensure you get a product that will last and perform as expected. Stainless steel pipes are an excellent investment for your home, and they can provide many years of trouble-free use.

When choosing stainless steel pipes for your home, select a reputable brand with a warranty. Knowing you are protected if something goes wrong will make you feel more at peace.

This material offers the following benefits:

  • Strong and corrosion-resistant
  • Pipes can be produced in flexible or rigid
  • Available in several sizes and lengths

Cast Iron

Cast iron p-trap and Pipes
Cast iron p-trap and Pipes

The bulk of cast iron P traps are bell and spigot types, the most heavy-duty plumbing pipes. They’re highly resilient and may replace portions of a cast iron piping system using PVC. Cast iron pipes, however, are rather hefty and need additional support during installation.

Cast iron pipes are frequently used in underground installations, such as significant pipes in drainage, sewage, and water distribution systems.

Grey Plastic Polybutylene

Polybutylene piping (PB) is a type of grey plastic plumbing pipe commonly used in home construction from the 1970s to the 1990s. It is inexpensive and easy to install but also prone to leaks.

ploybutylene p trap and pipe fittings
polybutylene p trap and pipe fittings

Over time, the plastic pipes can become brittle and crack, allowing water to leak into your home. If you have PB piping in your home, it is crucial to have it inspected regularly by a licensed plumber. Any damage to your house should be fixed or replaced as quickly as feasible to stop additional harm.

High-Density Polyethylene (HDPE)

High-density polyethylene piping (HDPE) is a flexible material commonly used in various applications. HDPE offers excellent corrosion resistance and long service life, making it an ideal choice for many industries.

HDPE P-trap
HDPE P-trap

However, this superior performance comes at a price, and HDPE is typically more expensive than PVC. Despite the higher cost, HDPE is often preferred for demanding applications where corrosion resistance and long-term reliability are critical. In addition, HDPE is a recyclable material, making it an environmentally friendly option for many projects. When selecting piping for your next project, consider the benefits of HDPE to determine if it is the best choice for your needs.

Polypropylene (PP)

Polypropylene P traps are rigid plastic pipes that are similar in many ways to CPVC pipes. Like CPVC, they are solid and durable, making them an excellent choice for plumbing and other applications.

However, polypropylene pipes are not combined with chemicals; heat is used to adhesive the mating ends. This makes for a stronger bond that is less likely to leak. In addition, polypropylene is resistant to various chemicals, making it an ideal choice for many industrial applications.

PP p-trap
PP p-trap

Consequently, polypropylene pipes have become increasingly popular as an alternative to traditional metal and PVC piping in recent years.

  • PP is frequently utilized in Europe but not discussed well in the US.
  • PP is a long-lasting, human-safe, and ecologically beneficial substance.
  • The most significant disadvantage is a complicated installation procedure that needs specialist equipment.

PP trap is commonly used in hot and cold water supplies and drains.

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