Choosing Drainage Pipe for Saudi Projects
Choosing drainage pipe in Saudi Arabia comes down to four things: gravity sewer versus pressurised drainage, the right diameter for the flow, the correct SAS class, and the pipe type for the ground conditions. uPVC sewer pipe to SAS 1395/1396 (Class 2–4, 110–710 mm) covers most gravity drainage; perforated pipe handles sub-soil and groundwater. 4B Factory manufactures the full range in Al-Kharj.
Sizes
Gravity Sewer or Sub-Soil Drainage?
The first decision is what the pipe is draining. Gravity sewer and stormwater systems carry wastewater or surface water downhill and use solid-wall uPVC sewer pipe to SAS 1395/1396, sized by flow. Sub-soil and groundwater drainage — lowering the water table around foundations or in agriculture — uses perforated or slotted pipe that lets water enter through the wall.
Most projects need both: solid sewer pipe for the wastewater network, and perforated pipe for dewatering and land drainage. Getting this split right at the design stage avoids specifying the wrong pipe for either job.
Drainage Pipe by Application
Match the drainage job to the right pipe type, class and size. Confirm exact ratings against the product datasheet.
| Application | Pipe, Class & Size |
|---|---|
| Municipal Gravity Sewer | uPVC sewer · SAS 1395/1396 · Class 3–4 · 200–710 mm |
| Building & Residential Drainage | uPVC sewer · SAS 1395/1396 · Class 2–3 · 110–315 mm |
| Stormwater Drainage | uPVC sewer / large-diameter · Class 3–4 · up to 710 mm |
| Sub-Soil & Dewatering | Perforated uPVC · slotted/perforated wall · 75–500 mm |
| Agricultural Land Drainage | Perforated uPVC · custom slot pattern · 75–315 mm |
| Bends, Junctions & Specials | Fabricated uPVC · made to drainage spec |
What to Confirm Before You Specify
1. Pipe Type
Solid-wall sewer for wastewater and stormwater; perforated for sub-soil — see uPVC sewer pipes and perforated pipe.
2. Diameter for Flow
Size the pipe to the peak flow — 110 mm for building drainage up to 710 mm for municipal and stormwater mains.
3. SAS Class
Sewer pipe comes in Class 2–4 to SAS 1395/1396 — heavier classes for deeper burial and traffic loading.
4. Ground Conditions
uPVC's corrosion resistance suits Saudi saline ground; perforated patterns are matched to soil and water table.
Bends & Junctions
Drainage runs need bends, junctions and specials — fabricated to spec, see fabricated products.
Standards & Approval
Confirm SAS compliance and request the certificate of conformity — see the full product range.
Drainage Pipe by 4B Factory
Solid-wall sewer, perforated and fabricated drainage pipe, manufactured in Al-Kharj to Saudi Standards. Open any product for full specifications.
uPVC Sewer Pipes
Solid-wall gravity drainage. SAS 1395/1396, Class 2–4, 110–710 mm.
More Information →
Specifying a Drainage System?
Send your drainage type, flow, depth and site conditions and 4B Factory will recommend the right sewer or perforated pipe, class and diameter, manufactured in Al-Kharj with standards documentation.
Frequently Asked Questions
uPVC sewer pipe to SAS 1395/1396 is the standard choice for gravity drainage in Saudi Arabia. It is corrosion-free, comes in Class 2–4 and sizes 110–710 mm, and suits municipal, building and stormwater drainage.
Solid-wall sewer pipe carries wastewater and stormwater in a closed system. Perforated pipe has slots or holes in the wall to let groundwater in, so it is used for sub-soil drainage and dewatering, not for carrying sewage.
Size the pipe to the peak flow: 110–160 mm for building drainage, 200–315 mm for residential networks, and up to 710 mm for municipal and stormwater mains. A drainage engineer confirms the exact size for the flow.
uPVC sewer pipe comes in Class 2–4 to SAS 1395/1396. Heavier classes are used for deeper burial and where traffic or surcharge loading is higher. Confirm the class against the burial depth and loading.
Yes. uPVC does not corrode, which suits Saudi Arabia's saline ground and groundwater. It is the standard material for sewer, stormwater and sub-soil drainage across the Kingdom.
Request Drainage Pipe for Your Project
Send your drainage type, sizes, class and quantities for a factory-direct quotation with standards documentation. Call, WhatsApp, or email info@4bfactory.com.