GRP septic tanks, single or two-chamber, built to your municipality's requirement
We make each septic tank to order as one sealed piece in our Dammam factory, at the capacity and chamber layout your engineer or municipality asks for, and deliver it ready to bury with an installation guide.
- One or two chambers
- One-piece, no rust
- 25-year warranty
- Delivery to every region
We reply within one working hour, Saturday to Thursday.
What the Saudi private sewage code asks of a septic tank
The Saudi Private Sewage Disposal Code (SBC 702) lists glass fibre among the permitted septic-tank materials and requires the tank to be watertight and formed as a single structure. Its key figures, in plain terms, to check with your engineer:
- At least two compartments: the inlet compartment at least two-thirds of total capacity and not under 1.9 m³; the second at least 0.95 m³ and no more than one-third.
- Minimum liquid capacity 2.85 m³ (2,850 litres).
- Liquid depth at least 750 mm; cylindrical tanks at least 1.2 m in diameter.
- One 600 mm access opening per compartment, with a GRP riser integral to the tank.
- A 75 mm compacted bed of sand or gravel under the tank.
- Pump-out when sludge and scum reach one-third of the liquid capacity.
From our factory and delivery sites
Real photos from the Laura factory in Dammam and from loading and delivery.
Single or two-chamber, to your municipality
Requirements differ between municipalities, so we build single or two-chamber tanks to what your municipality or your engineer's drawing specifies. Send the requirement or drawing with your request.
Our smallest diameter is 1.20 m, the code's minimum for cylindrical tanks. A 600 mm manhole with a GRP riser is available on request, and capacity is set by length on the diameter that suits your pit.
Septic tank with a soakaway, or a sealed holding tank?
Where groundwater is high or the site floods, the code requires the tank to be anchored against buoyancy. That belongs to the pit design your engineer sets.
- A septic tank settles the solids and discharges the liquid to a soakaway or drain field, so the soil and site must allow drainage.
- A holding tank is sealed, has no outlet and is emptied by a suction tanker. The code allows it only where no other private system fits the site; for non-dwellings it must hold at least 7.6 m³ and five days of flow.
Who digs and installs, and what keeps the warranty
The factory guarantees the tank for 25 years from the invoice date against manufacturing defects, provided the installation guide is followed. Damage from backfill containing rocks is not covered.
- Laura builds the tank, delivers it, places it by crane as a paid service on request, and sends the installation guide with the quote.
- You or your contractor handle the municipal permit, pit, bedding, connections, backfill and inspection.
Frequently asked questions
Will the municipality accept a GRP septic tank?
SBC 702 lists glass fibre among permitted septic-tank materials. Acceptance of your design and installation comes from the municipality's inspection, which is why we build to its requirement.
What capacity do I need?
The code sizes the tank by the number of building users or the waste volume, with a 2,850-litre liquid minimum. Your engineer or municipality sets it; if you do not know, tell us how many people use the building.
When should it be emptied?
Under the code, when sludge reaches one-third of the liquid capacity. For a sealed holding tank, a larger capacity means longer between pump-outs.
I live in an attached villa. Do I need my own septic tank?
Riyadh Municipality's project audit form requires separate services, including water and sewage tanks, for each attached villa. Check your own municipality's requirement.
Will a GRP septic tank rust or break?
GRP does not rust. The tank stays sound when buried to the installation guide, on a clean bed with rock-free backfill.
Do you deliver to my city?
Yes, to every region of Saudi Arabia. Delivery and crane placement are priced in the quote, or you can collect from the factory.
Related pages
Septic tank rules
The Saudi Private Sewage Code figures, in plain words.
Underground installation
Pit, sand bed, backfill and slab, step by step.
Villas and homes
Cooler water in summer, no rust or algae, and a clear split of who digs and who pours.
Underground water tanks
Cooler water in summer, no rust or algae, any capacity from 2,000 litres.
Ready for your quote?
Send the type, capacity and city, and we reply within an hour.