An engineer explains why kitchen drains should use reinforced-series PVC piping; the gray piping withstands effluents up to 70°C from the machine and boiling water in the sink, resists impact better, and prevents cracks and problems that can arise in 2 or 3 years.

Written by Carla Teles

Published on 24/04/2026 at 21:03

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In kitchen drainage, using reinforced series gray PVC piping helps handle boiling water in the sink and hot effluent from the washing machine, reducing the risk of cracks and increasing installation durability with little cost difference over a few meters.

A civil engineer specializing in BIM installation projects explained why kitchen drainage often requires two types of piping in the same environment. In the project shown, white pipes, normal series PVC drainage, and gray pipes, reinforced series PVC, appear. The difference, according to her, is not aesthetic: it is a choice of use to avoid future problems in the client’s installation.

The central point lies in the kitchen routine. Contrary to what many people think, the challenge is not just “hot tap water.” Kitchen drainage receives high-temperature effluents from the washing machine, which can discharge water at 70°C, and also very hot water from food preparation, such as electric kettle water poured into the sink and boiling water used in cooking, which ends up going down the drain.

Kitchen drainage: why reinforced series gray piping is recommended

Kitchen drainage: Reinforced series PVC and gray piping withstand boiling water and washing machine, preventing cracks.

The engineer states that normal series white PVC piping does not resist high temperatures as well as the reinforced series. Therefore, the project guidance is to use reinforced series PVC throughout the entire kitchen drainage line up to the grease trap.

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What changes in practice: washing machine effluent at 70°C and boiling water in the sink become the real test

The most direct example cited is the washing machine, which heats water for cleaning and can discharge an effluent of around 70°C into the system. Added to this are common daily habits: electric kettle water and boiling cooking water, such as pasta water, which many people pour directly into the sink.

In practice, this means that kitchen drainage doesn’t just receive “lukewarm” water. It can frequently receive temperature peaks, and this repetition is the type of stress that, according to the engineer, makes reinforced series PVC a safer choice for this specific section.

Impact resistance: why the reinforced series helps beyond temperature

In addition to temperature, reinforced series piping is described as more impact-resistant. The engineer mentions that it is also recommended when piping passes through areas with vehicle traffic and without a slab above, precisely because it is a more robust material.

In the case of the kitchen, the practical consequence is to increase the installation’s tolerance to aggressions from use and construction, reducing the chance of small cracks that turn into leaks and subsequent repairs.

“Will it be a problem if I use white PVC?” The risk that might only appear in 2 or 3 years

The engineer does not say that white PVC will necessarily fail immediately. She states that nothing might happen in six months, or even in a year. The warning is about the medium term: depending on the frequency of installation use, the problem might appear in 2 or 3 years, precisely when many people already think “everything is resolved.”

That’s why the recommendation is to focus on specific points. The idea is not to apply the reinforced series throughout the entire house, but in the section where the actual use of kitchen drainage is more aggressive.

“Few meters, big difference”: the cost argument and the design decision

Another point highlighted is the cost. The engineer states that there is a small difference in the per-meter value between normal series white PVC and reinforced series PVC of the same gauge, and that, since kitchens have few meters, the additional investment tends to be limited.

According to her, this small acquisition difference can generate a big difference in the quality and durability of the installation, because it avoids rework and future problems in a critical point of the house.

BIM and quantities: how the choice becomes a material list and arrives ready at the construction site

The engineer also explains how this fits into the design process. Since projects are done in BIM, everything inserted into the model automatically appears in the quantities. She cites the example of inserting 4 meters of reinforced series piping, which automatically appears in the material list, allowing the client to quote, purchase, and bring to the construction site exactly what is planned.

In practice, the choice of material ceases to be “on-site improvisation” and becomes a planned decision in the project, with a direct impact on execution.

Do you use reinforced series for kitchen sewage in your projects, or do you think white PVC is sufficient and reinforced is overkill?

Content based on information presented on the channel Julia Cadore – BIM Installations.

An engineer explains why kitchen drains should use reinforced-series PVC piping; the gray piping withstands effluents up to 70°C from the machine and boiling water in the sink, resists impact better, and prevents cracks and problems that can arise in 2 or 3 years.

In kitchen drainage, using reinforced series gray PVC piping helps handle boiling water in the sink and hot effluent from the washing machine, reducing the risk of cracks and increasing installation durability with little cost difference over a few meters.

Kitchen drainage: why reinforced series gray piping is recommended

What changes in practice: washing machine effluent at 70°C and boiling water in the sink become the real test

Impact resistance: why the reinforced series helps beyond temperature

“Will it be a problem if I use white PVC?” The risk that might only appear in 2 or 3 years

“Few meters, big difference”: the cost argument and the design decision

BIM and quantities: how the choice becomes a material list and arrives ready at the construction site

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An engineer explains why kitchen drains should use reinforced-series PVC piping; the gray piping withstands effluents up to 70°C from the machine and boiling water in the sink, resists impact better, and prevents cracks and problems that can arise in 2 or 3 years.

In kitchen drainage, using reinforced series gray PVC piping helps handle boiling water in the sink and hot effluent from the washing machine, reducing the risk of cracks and increasing installation durability with little cost difference over a few meters.

Kitchen drainage: why reinforced series gray piping is recommended

What changes in practice: washing machine effluent at 70°C and boiling water in the sink become the real test

Impact resistance: why the reinforced series helps beyond temperature

“Will it be a problem if I use white PVC?” The risk that might only appear in 2 or 3 years

“Few meters, big difference”: the cost argument and the design decision

BIM and quantities: how the choice becomes a material list and arrives ready at the construction site

The Soviet Union spent 22 years drilling into the Earth’s crust and reached a depth of 12,262 meters — they found water where it was thought impossible, hydrogen bubbling from the rock, granite that is 2.7 billion years old, and temperatures of 180 degrees that melted the drill bits.

Ethiopia has banned gasoline and diesel cars, placed over a hundred silent electric buses on the streets of Addis Ababa, and now aims for half a million electric vehicles by 2030, all powered by Africa’s largest dam and a courage that few countries have shown.

Egypt wants to draw 10 million cubic meters of water from the Nile per day into the desert, irrigate a new agricultural frontier, and build a city where there is currently only sand.

BRICS is preparing a payment system inspired by the Brazilian PIX that will allow direct transactions between countries using national digital currencies without relying on the dollar or Western banks as intermediaries.

Norway is drilling 27 kilometers of rock 392 meters below the bottom of a fjord to build the world’s largest and deepest underwater road tunnel — when completed, a 21-hour journey will be reduced to 10.

Chinese engineers begin filling a 217-meter dam at an altitude of 3,000 meters and prepare a 2,240 MW hydroelectric power plant to integrate hydropower, solar, and wind energy in the upper Jinsha.

An astronaut spent 340 days in space while his twin brother stayed on Earth, and NASA found a “rejuvenating” effect, genes, microbiome, cognition, and immune system that revealed the biological cost of living outside the planet.

It’s not a 3D printer: an inventor from Pará created a construction robot that ejects reinforced concrete into molds and builds an entire house at once, reduces labor by 50%, saves 20% on cost, and is already negotiating over 1,000 units across Brazil.

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In 1991, Brazil’s GDP was almost double India’s, and today it is little more than half: while India grew 6.5% per year and trained engineers, Brazil preferred to train lawyers, and now it is rushing to strengthen ties with the world’s fourth-largest economy.

A mother taught her twin children to read and write at age 2 inside an oncology hospital, and 16 years later, the two were accepted into two of the most difficult universities in the world in the United States.

NASA transforms a retired Boeing 777 aircraft into its largest flying laboratory, capable of carrying 34 tons of equipment to 13,100 meters and flying for 18 hours to investigate storms, polar ice, and extreme weather events across the planet.

It’s not a 3D printer: an inventor from Pará created a construction robot that ejects reinforced concrete into molds and builds an entire house at once, reduces labor by 50%, saves 20% on cost, and is already negotiating over 1,000 units across Brazil.